Previous two summaries

STRONG QUAKE IN SAIPAN, MARIANAS PROBABLY PROMOTED BY TYPHOON KROSA

EARTHQUAKE SUMMARY FOR AUGUST 18, 2019

The strongest earthquake in the world today occurred as an M 5.9 in the northern Mariana Islands. NEIC reported it was felt with intensity II-III in San Roque and Garapan, Saipan, Northern Marianas; in Tinian MP and in Tamuning, Guam. Typhoon Krosa passed over this epicenter about a week ago and was probably a promotional factor in the enhancement of regional seismicity since that time. This summary had noted at the time:

"Typhoon KROSA (11W) continued today over the Volcano Islands with winds up to 105 kts. It is expected to track to the north and possibly to make landfall near Tokyo, Japan around August 15. Some seismic increases may be expected in the Mariana and Volcano Islands and later in eastern Honshu, Japan over the next several days. These areas are currently under a seismic watch through mid-August." (August 9-12, 2019)

A similar M 5.9 hit about 200 km northeast of this on October 26, 2018, a likely aftershock of an M 6.4 on August 28, 2018, the largest in the region since February, 2005. Tropical Storm Jebi was suggested as promotional factor in the August, 2018 event as:

"TS Jebi (TD 25W) continued today east of Guam with winds up to 45 kts. It is expected to track to the northwest reaching the Mariana and Volcano Islands around August 30-31. Seismicity is expected to be enhanced in these regions as Typhoon Jebi

passes through the region." (August 26-28. 2018)

Forecast 117986 had expected today's Mariana Islands activity to the south around August 17.

O: 18AUG2019 18:55:15 16.3N 146.6E mb=4.9 EMSC ANATAHAN REG, N. MARIANA ISLAN

O: 18AUG2019 18:00:26 16.7N 146.3E mb=5.9 EMSC ANATAHAN REG, N. MARIANA ISLAN

P: 17AUG2019 117986 14.0N 145.0E 4.0-5.4 ACAAA So. Marianas/Guam

Another moderate earthquake occurred in Kansas today. This event of M 4.1 was reported by NEIC to have been felt with intensity V in Hutchinson and South Hutchinson and in Arlington, Kansas. Intensity II-III was reported from Partridge, Nickerson, Haven, Buhler, Pretty Prairie, and Sterling, Kansas. This is probably an aftershock of the M 4.7 in Kansas which occurred August 16 and which was described at the time in this summary as:

"A moderate earthquake of M 4.7 was widely felt in Kansas today. NEIC reported this event was felt with maximum intensity VI in Hutchinson, Kansas and V in South Hutchinson and IV in Partridge, Nickerson, Buhler and II-III in Haven, Pretty Prairie, Arlington, Kansas. It was probably triggered by high tidal stresses associated with the full moon on August 15. Earthquakes in this section of the U.S. often occur within a couple of days of full and new moons as noted for example, in previous issues of this summary" (August 16, 2019)

"Today's earthquake of M 4.7 is the strongest in Kansas or Oklahoma since an M 5.0 on November 7, 2016 nearly three years ago. Forecasts 118042 and 118043 had expected today's activity was likely around August 16-17. This earthquake is located at 144 degrees from the M 6.8 in Sumatra of August 2 and was probably promoted by energy from that source." (August 17, 2019)

O: 18AUG2019 08:45:29 38.0N 98.0W Mw=4.1 EMSC KANSAS

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

P: 17AUG2019 118042 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains

An unusual earthquake of M 4.7 hit the area northeast of Australia today continuing unusual seismicity to the north of Australia over the past month. The only similar or larger event within about 300 km of this epicenter east of

Australia in the past 30 years was an M 5.7 on August 18, 2016, exactly three years ago. When this 2016 earthquake occurred this summary noted the coincidence with TS Fiona and the full moon. As today's event also occurred new full moon, a tidal promotion may be implied. The summary from August 18, 2016 had noted in this regard:

"The strongest and most unusual earthquake in the world today was an M 5.7 in Queensland, Australia. This is the strongest earthquake ever recorded off northern Queensland within about 500 km of this epicenter. It was followed by a series of light aftershocks. Simultaneously with this earthquake, the first tropical storm in the Atlantic season came to life near the antipode of this earthquake. This summary has previously reported on the connection between strong tropical storms in the Atlantic and subsequent moderate earthquakes in or near Australia. This appears to be another example of this type of interaction. Another promoter of this event may have been tidal stresses as today is the full moon and the quake occurred near local solar noon." (August 18, 2016)

The 2016 quake was associated with a strong M 7.5 in the South Pacific near the South Sandwich Islands (see History section). Today’s event was also coincident with event of M 5.0 and 5.1 in the South Sandwich Islands which were at 103 degrees from the M 6.8 in Sumatra of August 2.

Today's epicenter is at 103 degrees from the July 6, 2019 M 7.1 in Central California. Seismicity often increases at this distance from large event, probably related to surface energy and today's event in Australia may have been promoted from

California.

O: 18AUG2019 11:38:41 21.0S 151.9E mb=4.7 EMSC EAST OF AUSTRALIA

OTHER GLOBAL EARTHQUAKE ACTIVITY

For most events there are two listings. The first line is the observed event starting with "O:" for Observed. There follows the date, month and year, the time in UT hours:minutes:seconds, the latitude and longitude, the given magnitude and the reporting agency followed by the geographic location. The second line starts with "P:" This is the forecast event as forecast in our summaries normally more than a month in advance. Magnitudes may vary in response to updated seismic watches and daily variations due to tidal and other influences. This line has the forecast date, month and year, the forecast number, latitude, longitude and forecast magnitude range. This is followed by a comparison between the forecast and the event. The comparison includes letters A-D. The first is number of days difference from predicted (A:up to 2, B3-5; C:6-10; D:more than 10), Difference in latitude (A:up to 1 degree; B:1-2 degrees; C:2-4 degrees; D:more than 4 degrees); longitude (same comparison as with latitude); magnitude (A: within forecast range; B: higher than forecast range; C: lower than forecast range; D: no comparison possible). The last letter is a stand in for a future comparison which needs to be done statistically after a large number of forecasts have been made. In previous data, an excellent match is generally AAAAA; a good match as one or two B's; a fair match has several B's and C's and a poor match is one which contains a number of C's or D's.

ASIA

O: 18AUG2019 07:52:44 55.0N 164.7E mb=4.5 EMSC KOMANDORSKIYE OSTROVA REGION

P: 16AUG2019 118090 53.0N 170.0E 4.0-5.5 ABCAA Near Islands

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 18AUG2019 10:05:37 0.7S 127.4E ML=4.2 EMSC HALMAHERA, INDONESIA

O: 19AUG2019 05:53:47 0.8S 128.3E mb=4.8 EMSC HALMAHERA, INDONESIA

P: 17AUG2019 117949 1.0S 127.0E 4.0-5.3 AAAAA Ceram area

O: 18AUG2019 09:02:23 1.6N 127.2E ML=4.1 EMSC HALMAHERA, INDONESIA

P: 13AUG2019 117940 1.0N 126.0E 4.0-5.3 BAAAA Mindanao, Philippines

O: 18AUG2019 22:05:25 1.6S 127.0E ML=4.5 EMSC KEPULAUAN SULA, INDONESIA

P: 17AUG2019 117949 1.0S 127.0E 4.0-5.3 AAAAA Ceram area

O: 18AUG2019 19:18:55 2.7N 97.5E ML=4.2 EMSC NORTHERN SUMATRA, INDONESIA

P: 19AUG2019 117943 1.0N 98.0E 4.0-5.3 ABAAA So. Sumatera

O: 18AUG2019 14:04:56 3.3S 140.0E ML=4.0 EMSC PAPUA, INDONESIA

P: 15AUG2019 117958 3.0S 142.0E 4.0-5.4 BABAA Papua New Guinea

O: 19AUG2019 01:57:52 3.8N 126.0E ML=4.8 EMSC KEPULAUAN TALAUD, INDONESIA

P: 21AUG2019 117941 3.0N 126.0E 4.0-5.3 AAAAA Mindanao, Philippines

O: 19AUG2019 04:00:27 8.1S 108.1E ML=4.6 EMSC JAVA, INDONESIA

P: 20AUG2019 117959 9.0S 110.0E 4.0-5.3 AABAA So. of Java

O: 18AUG2019 07:06:42 11.3S 124.0E mb=5.0 EMSC SOUTH OF TIMOR

P: 18AUG2019 117951 8.0S 124.0E 4.0-5.3 ACAAA Flores Island area

O: 18AUG2019 18:55:15 16.3N 146.6E mb=4.9 EMSC ANATAHAN REG, N. MARIANA ISLAN

O: 18AUG2019 18:00:26 16.7N 146.3E mb=5.9 EMSC ANATAHAN REG, N. MARIANA ISLAN

P: 17AUG2019 117986 14.0N 145.0E 4.0-5.4 ACAAA So. Marianas/Guam

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 18AUG2019 09:28:28 2.3S 79.3W Mw=5.0 EMSC NEAR COAST OF ECUADOR

P: 21AUG2019 117950 1.0S 81.0W 4.0-5.4 BBBAA Ecuador

NEIC reported this earthquake of M 5.0 near the coast of Ecuador was felt with intensity II-III in the area(s) of Ecuador at Eloy Alfaro, Azogues, Guayaquil, Cuenca, Santa Lucia, Jipijapa and Canamanga.

O: 19AUG2019 05:37:43 12.3S 75.3W mb=4.7 EMSC CENTRAL PERU

P: 13AUG2019 118117 11.0S 74.0W 4.0-5.4 CBAAA Central Peru

NEIC reported this earthquake of M 4.7 in Central Peru was felt with intensity VI in Huayucachi, Junin, Peru and II-III in the area(s) of Central Peru in San Luis and Lima.

O: 19AUG2019 03:04:59 16.0N 98.7W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO

O: 19AUG2019 04:06:46 16.0N 98.7W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO

P: 18AUG2019 117983 16.0N 98.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 19AUG2019 03:26:03 16.4N 86.9W mb=4.2 EMSC OFFSHORE HONDURAS

P: 18AUG2019 117981 17.0N 86.0W 3.5-5.0 AAAAA Nicaragua

NEIC reported this earthquake of M 4.2 in Honduras was felt with intensity II-III in the area(s) of Honduras at Sandy Bay, La Ceiba and Corozal.

O: 19AUG2019 05:42:16 17.6N 98.6W ML=4.2 EMSC GUERRERO, MEXICO

P: 18AUG2019 117983 16.0N 98.0W 3.5-5.2 ABAAA Oaxaca, Mexico

O: 19AUG2019 01:49:19 18.2N 64.1W Md=3.2 EMSC VIRGIN ISLANDS REGION

P: 20AUG2019 117973 19.0N 65.0W 3.0-4.8 AAAAA Leeward Islands

O: 18AUG2019 12:51:46 18.2N 100.3W ML=4.3 EMSC GUERRERO, MEXICO

P: 14AUG2019 117984 18.0N 100.0W 3.5-5.0 BAAAA Oaxaca, Mexico

O: 19AUG2019 05:28:32 18.5N 69.0W Md=3.3 EMSC DOMINICAN REPUBLIC

P: 21AUG2019 117985 19.0N 68.0W 3.4-4.9 AAAAA Puerto Rico

O: 19AUG2019 00:28:12 18.8S 67.9W Mw=4.1 EMSC ORURO, BOLIVIA

P: 21AUG2019 118122 19.0S 69.0W 4.0-5.3 AAAAA So. Peru/Bolivia

O: 18AUG2019 19:13:59 20.2S 68.8W Mw=4.3 EMSC TARAPACA, CHILE

P: 17AUG2019 118126 21.0S 68.0W 4.0-5.4 AAAAA Argentina

O: 18AUG2019 07:53:30 28.1N 112.1W ML=3.3 EMSC GULF OF CALIFORNIA

P: 14AUG2019 117992 28.0N 112.0W 3.5-4.8 BAAAA Gulf of California

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 19AUG2019 06:06:05 59.8S 27.8W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION

P: 15AUG2019 118152 57.0S 27.0W 4.0-5.5 BCAAA So. Sandwich Islands

O: 19AUG2019 03:44:17 60.6S 25.4W mb=5.2 EMSC SOUTH SANDWICH ISLANDS REGION

P: 16AUG2019 118152 61.0S 26.0W 4.0-5.3 BAAAA Southern Ocean

ZEALANDIA AND AUSTRALIA REGION

O: 18AUG2019 11:38:41 21.0S 151.9E mb=4.7 EMSC EAST OF AUSTRALIA

JAPAN AND KURIL ISLANDS

O: 18AUG2019 10:06:41 38.6N 139.4E mb=4.5 EMSC NEAR WEST COAST OF HONSHU, JAP

P: 17AUG2019 118029 38.0N 141.0E 4.0-5.3 AAAAA Off East Coast Honshu

NEIC reported this earthquake of M 4.5 in northwestern Honshu, Japan was felt with intensity II-III in the area(s) of Niigata and Nagoaka, Japan.

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 18AUG2019 20:33:38 31.8N 115.9W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

P: 14AUG2019 118033 31.9N 116.3W 2.5-4.3 BAAAA So. California

O: 19AUG2019 01:24:12 33.6N 116.8W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 07:10:42 34.2N 116.9W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 20AUG2019 118036 34.1N 117.4W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 2.8 in Southern California was felt with intensity IV in Hemet and Aguanga, California and II-III in the area(s) of Hemet, Anza, Murrieta, Escondido, California.

O: 18AUG2019 23:21:53 36.6N 121.2W Md=2.0 EMSC CENTRAL CALIFORNIA

O: 19AUG2019 04:25:13 37.8N 122.2W Md=2.6 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 17AUG2019 118011 36.8N 121.3W 2.5-4.3 AAAAA Central California

NEIC reported this earthquake of M 2.6 in the San Francisco Bay area, California was felt with intensity II-III in the area(s) of Oakland, San Leandro, Castro Valley, Oakland, and Alameda, California.

O: 18AUG2019 17:44:23 40.3N 122.1W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117840 40.6N 122.4W 2.5-4.3 DAAAA Northern California

O: 19AUG2019 04:06:51 40.5N 124.7W Md=2.3 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 19AUG2019 03:03:51 40.6N 124.3W Md=2.4 EMSC NORTHERN CALIFORNIA

P: 15AUG2019 118066 40.3N 124.7W 2.5-4.3 BAAAA Off Coast of No. Calif

O: 18AUG2019 22:02:28 35.7N 117.5W Ml=2.6 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 18:59:18 36.1N 117.9W Ml=2.0 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 18:56:43 35.7N 117.5W ML=3.3 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 18:48:08 35.6N 117.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 18:27:42 36.1N 117.9W ML=3.1 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 18:24:10 35.7N 117.5W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 16:20:49 36.1N 117.9W ML=2.8 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 16:08:34 36.1N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 16:04:20 36.1N 117.9W Ml=2.3 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 13:22:44 36.1N 117.9W Ml=2.2 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 08:25:34 35.9N 117.7W Ml=2.2 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 08:23:59 35.9N 117.7W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 07:42:25 36.1N 117.9W ML=3.3 EMSC CENTRAL CALIFORNIA

O: 19AUG2019 00:09:12 35.7N 117.5W ML=3.8 EMSC SOUTHERN CALIFORNIA

P: 16AUG2019 118039 35.8N 117.6W 2.5-4.4 BAAAA So. California

ALASKA

O: 19AUG2019 02:35:39 56.2N 149.6W ML=3.9 EMSC GULF OF ALASKA

O: 18AUG2019 10:14:24 68.8N 146.2W ML=3.0 EMSC NORTHERN ALASKA

O: 18AUG2019 14:29:33 69.2N 147.9W ML=3.2 EMSC NORTHERN ALASKA

P: 17AUG2019 118108 69.2N 144.4W 3.2-4.8 AAAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

O: 18AUG2019 21:29:10 31.3N 103.6W ML=2.6 EMSC WESTERN TEXAS

O: 19AUG2019 03:10:31 31.7N 104.3W ML=2.6 EMSC WESTERN TEXAS

P: 11AUG2019 117802 31.4N 103.8W 2.0-3.9 CAAAA SW U.S.A

EASTERN U.S./CANADA

O: 18AUG2019 09:07:12 35.1N 95.4W Mw=3.7 EMSC OKLAHOMA

O: 19AUG2019 00:06:05 35.8N 99.2W ML=2.3 EMSC OKLAHOMA

P: 15AUG2019 118042 35.0N 96.0W 2.0-3.8 BABAA Southeast U.S.

NEIC reported this earthquake of M 3.7 in Oklahoma was felt with intensity IV in Stigler and Checotah, Oklahoma and II-III in the area(s) of Oklahoma at Kinta, Quinton, Eufaula, Muskogee and Park Hill.

O: 18AUG2019 08:45:29 38.0N 98.0W Mw=4.1 EMSC KANSAS

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

P: 17AUG2019 118042 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains

O: 18AUG2019 07:25:24 36.2N 82.8W Md=2.2 EMSC EASTERN TENNESSEE

P: 21AUG2019 118022 38.0N 87.0W 2.0-3.8 BBCAA New Madrid area

HAWAII

No earthquakes of M>=3 were located in Hawaii.

MODERATE QUAKE SHAKES BURMA

EARTHQUAKE SUMMARY FOR AUGUST 17, 2019

The strongest earthquake in the world today was an M 5.3 in Myanmar/Burma. It was followed 14 minutes later by an aftershock of M 4.7. No major damage was reported with these quakes, but some minor, local damage is likely. These are located north of the Andaman and Nicobar Islands of India. The last earthquake within about 200 km of today's epicenters with M>5.3 occurred as an M 6.0 on January 11, 2018 and prior to that in April, 2013. Forecast 117964 had expected today's activity to the south in mid-August.

NEIC reported this earthquake of M 5.3 in Burma was felt with intensity IV in Mandalay, Myanmar and in Burma with intensity II-III in the area(s) of Tharrawaddy and Rangoon, Myanmar.

O: 18AUG2019 03:38:15 18.5N 94.6E mb=4.7 EMSC MYANMAR

O: 18AUG2019 03:24:25 18.6N 94.7E Mw=5.3 EMSC MYANMAR

P: 14AUG2019 117964 16.0N 93.0E 4.0-5.4 BCBAA Andaman Islands

The strongest earthquake in the U.S. or Canada today was an M 4.3 in the Alaska Peninsula near Unimak Island. The last earthquake within about 100 km of this epicenter with M>=4.3 was an M 4.4 on July 3, 2019 and prior to that an M 4.4 on April 8, 2019. The last of significantly larger magnitude in this region was an M 6.0 on December 31, 2018. Today's event is probably an aftershock of the December event. Forecast 118097 had expected today's epicenter would be active within about 50 km around August 21.

O: 17AUG2019 20:33:44 54.2N 161.6W mb=4.3 EMSC ALASKA PENINSULA

P: 21AUG2019 118097 54.7N 161.2W 3.5-4.8 BAAAA Unimak Islands, Aleutians

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 18AUG2019 03:38:15 18.5N 94.6E mb=4.7 EMSC MYANMAR

O: 18AUG2019 03:24:25 18.6N 94.7E Mw=5.3 EMSC MYANMAR

P: 14AUG2019 117964 16.0N 93.0E 4.0-5.4 BCBAA Andaman Islands

O: 17AUG2019 20:48:02 23.4N 118.6E mb=4.3 EMSC TAIWAN STRAIT

O: 17AUG2019 14:52:10 23.7N 121.5E ML=4.5 EMSC TAIWAN

O: 18AUG2019 04:05:14 23.7N 121.6E mb=5.0 EMSC TAIWAN

O: 18AUG2019 04:05:14 23.8N 121.5E ML=4.8 TAI Hualien, Taiwan

O: 17AUG2019 14:52:11 23.8N 121.5E ML=4.5 TAI Hualien, Taiwan

O: 17AUG2019 14:52:06 23.8N 121.5E ML=4.4 TAI Hualien, Taiwan

P: 19AUG2019 118001 23.0N 121.0E 4.0-5.3 AAAAA Taiwan

NEIC reported this earthquake of M 5.0 in Taiwan was felt with intensity II-III in the area(s) of Taiwan at Taipei and Kaohsiung.

NEIC reported this earthquake of M 4.3 west of Taiwan was felt with intensity II-III in the area(s) of Xiamen Fujian, China.

The M 4.8 was reported by CWB to have been felt with intensity V in Hualien, II in Nantou, Taitung and Taichung and I in Yilan, Chiayi, Yunlin, Changhua, Miaoli Counties, Taiwan.

The M 4.5 was reported felt with intensity IV in Hualien and I in Taitung, Nantou, Taichung, Yilan and Yunlin Counties, Taiwan

The M 4.4 was reported felt with intensity IV in Hualien and I in Taitung, Nantou and Taichung Counties, Taiwan

O: 18AUG2019 06:28:33 24.0N 93.9E mb=4.9 EMSC MANIPUR, INDIA REGION

P: 17AUG2019 117997 24.0N 94.0E 4.0-5.3 AAAAA Myanmar

O: 18AUG2019 03:12:58 43.9N 76.8E mb=4.6 EMSC EASTERN KAZAKHSTAN

O: 18AUG2019 00:38:52 44.1N 79.7E mb=4.1 EMSC EASTERN KAZAKHSTAN

O: 17AUG2019 23:07:44 44.2N 79.8E mb=4.5 EMSC EASTERN KAZAKHSTAN

P: 21AUG2019 118059 40.0N 78.0E 4.0-5.3 BCBAA Kirgizstan/Xinjiang

NEIC reported this earthquake of M 4.3 in Kazakhstan was felt with intensity V in the area(s) of Taldikorgan Almaty, Kazakhstan.

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 17AUG2019 09:12:29 0.1N 126.7E ML=4.3 EMSC MOLUCCA SEA

P: 17AUG2019 117949 1.0S 127.0E 4.0-5.3 ABAAA Ceram area

O: 17AUG2019 13:54:45 3.4S 101.7E mb=4.8 EMSC SOUTHERN SUMATRA, INDONESIA

P: 15AUG2019 117961 6.0S 102.0E 4.0-5.5 ACAAA So. of Sumatera

O: 17AUG2019 12:00:05 4.0N 126.7E ML=4.2 EMSC KEPULAUAN TALAUD, INDONESIA

P: 19AUG2019 117939 4.0N 127.0E 4.0-5.3 AAAAA Halmahera

O: 18AUG2019 04:19:20 5.5S 131.4E mb=4.5 EMSC BANDA SEA

P: 14AUG2019 117946 7.0S 130.0E 4.0-5.3 BBBAA Banda Sea

O: 17AUG2019 08:51:07 5.9S 102.3E mb=4.5 EMSC SOUTHERN SUMATRA, INDONESIA

P: 15AUG2019 117961 6.0S 102.0E 4.0-5.5 AAAAA So. of Sumatera

O: 17AUG2019 17:23:35 7.1S 108.9E ML=4.6 EMSC JAVA, INDONESIA

P: 20AUG2019 117959 9.0S 110.0E 4.0-5.3 BBAAA So. of Java

O: 17AUG2019 12:42:43 9.4S 120.7E ML=4.4 EMSC SUMBA REGION, INDONESIA

P: 21AUG2019 117951 7.0S 120.0E 4.0-5.3 BCAAA Flores Island area

O: 17AUG2019 15:37:40 9.5S 124.0E mb=4.5 EMSC TIMOR REGION

P: 18AUG2019 117951 8.0S 124.0E 4.0-5.3 ABAAA Flores Island area

O: 17AUG2019 23:55:51 18.8N 146.1E mb=4.5 EMSC PAGAN REG., N. MARIANA ISLANDS

P: 17AUG2019 117986 14.0N 145.0E 4.0-5.4 ACAAA So. Marianas/Guam

O: 17AUG2019 20:50:39 10.9S 113.8E ML=4.0 EMSC SOUTH OF JAVA, INDONESIA

P: 15AUG2019 117960 9.0S 114.0E 4.0-5.3 ABAAA So. of Java

CENTRAL AND SOUTH AMERICA

O: 17AUG2019 09:18 30.0S 71.7W mb=4.2 GUC Coquimbo at Andacollo, La Sere

P: 17AUG2019 118140 30.0S 70.0W 4.0-5.3 AAAAA Coast Central Chile

CSN reported this earthquake was felt with intensity IV in Coquimbo at Andacollo, La Serena and Vicuna and III in Coquimbo, Chile.

O: 17AUG2019 12:34:34 12.2N 88.0W mb=4.8 EMSC NEAR COAST OF NICARAGUA

P: 18AUG2019 117981 12.0N 87.0W 3.5-5.0 AAAAA Nicaragua

NEIC reported this earthquake of M 4.8 off the coast of Nicaragua was felt with intensity IV in the area(s) of Antiguo Cuscatlan, El Salvador.

O: 17AUG2019 15:13:07 15.9N 98.1W ML=4.3 EMSC OFFSHORE OAXACA, MEXICO

P: 18AUG2019 117983 16.0N 98.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 18AUG2019 02:24:45 16.4N 95.0W ML=4.1 EMSC OAXACA, MEXICO

O: 17AUG2019 11:16:51 16.4N 95.2W ML=4.0 EMSC OAXACA, MEXICO

P: 18AUG2019 117966 16.0N 94.0W 3.5-5.0 AAAAA Chiapas, Mexico

O: 17AUG2019 19:26:11 17.8N 69.4W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

P: 21AUG2019 117985 19.0N 68.0W 3.4-4.9 BBAAA Puerto Rico

O: 17AUG2019 15:45:12 18.1N 99.5W ML=4.1 EMSC GUERRERO, MEXICO

P: 14AUG2019 117984 18.0N 100.0W 3.5-5.0 BAAAA Oaxaca, Mexico

O: 18AUG2019 02:20:56 19.5N 70.4W ML=3.5 EMSC DOMINICAN REPUBLIC

O: 17AUG2019 12:23:31 19.7N 70.1W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

P: 21AUG2019 117985 19.0N 68.0W 3.4-4.9 BABAA Puerto Rico

O: 18AUG2019 01:50:20 19.7S 64.0W mb=4.6 EMSC CHUQUISACA, BOLIVIA

P: 14AUG2019 118127 23.0S 64.0W 4.0-5.3 BCAAA Argentina

O: 17AUG2019 19:47:50 20.0N 73.3W ML=3.7 EMSC HAITI REGION

P: 21AUG2019 117985 19.0N 68.0W 3.4-4.9 BACAA Puerto Rico

O: 18AUG2019 04:57:07 25.6N 110.2W ML=4.2 EMSC GULF OF CALIFORNIA

P: 14AUG2019 117992 24.0N 109.0W 3.5-4.8 BBAAA Gulf of California

O: 17AUG2019 09:18:19 30.0S 71.7W mb=4.6 EMSC OFFSHORE COQUIMBO, CHILE

P: 17AUG2019 118140 30.0S 70.0W 4.0-5.3 AAAAA Coast Central Chile

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 17AUG2019 21:35:12 38.7N 14.7E mb=4.1 EMSC SICILY, ITALY

P: 21AUG2019 118020 39.0N 14.0E 3.0-4.3 BAAAA Mediterranean/Sicily

O: 17AUG2019 10:27:49 63.7N 21.3W ML=3.0 EMSC ICELAND REGION

P: 19AUG2019 118109 62.0N 26.0W 3.0-4.3 ABCAA Iceland area

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 17AUG2019 08:40:08 11.5S 166.3E mb=4.6 EMSC SANTA CRUZ ISLANDS

P: 9AUG2019 117903 11.0S 166.0E 4.0-5.3 CAAAA Vanuatu Islands

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

O: 17AUG2019 21:54:01 31.2S 177.4W mb=4.8 EMSC KERMADEC ISLANDS REGION

P: 18AUG2019 118141 30.0S 178.0W 4.0-5.3 ABAAA No. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 17AUG2019 22:36:06 22.6N 142.0E mb=4.3 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 21AUG2019 118002 23.0N 143.0E 4.0-5.3 BAAAA Volcano Islands

O: 17AUG2019 22:28:41 30.9N 142.5E mb=5.0 EMSC IZU ISLANDS, JAPAN REGION

P: 15AUG2019 118028 31.0N 141.0E 4.0-5.3 AAAAA Off East Coast Honshu

O: 17AUG2019 12:54:48 46.0N 152.0E mb=4.2 EMSC KURIL ISLANDS

O: 17AUG2019 07:18:06 46.8N 152.7E mb=4.6 EMSC KURIL ISLANDS

P: 21AUG2019 118075 49.0N 153.0E 3.5-5.3 BCAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 18AUG2019 06:45:48 35.7N 117.5W Ml=2.6 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 05:05:47 36.1N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 05:02:42 36.1N 117.9W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 18AUG2019 04:37:16 35.6N 117.4W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 18AUG2019 02:17:06 36.1N 117.9W Ml=2.3 EMSC CENTRAL CALIFORNIA

O: 17AUG2019 23:16:02 35.3N 117.9W Ml=2.3 EMSC SOUTHERN CALIFORNIA

O: 17AUG2019 17:28:38 36.1N 117.9W Ml=2.0 EMSC CENTRAL CALIFORNIA

O: 17AUG2019 17:24:09 36.1N 117.9W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 17AUG2019 13:37:49 36.1N 117.9W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 17AUG2019 11:55:31 35.9N 117.7W ML=3.1 EMSC CENTRAL CALIFORNIA

O: 17AUG2019 11:51:07 35.6N 117.5W Ml=2.3 EMSC SOUTHERN CALIFORNIA

P: 16AUG2019 118039 35.8N 117.6W 2.5-4.4 AAAAA So. California

O: 17AUG2019 14:20:58 32.7N 115.6W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 17AUG2019 21:07:12 33.0N 115.9W Ml=2.1 EMSC SOUTHERN CALIFORNIA

P: 17AUG2019 118035 32.9N 115.6W 2.5-4.3 AAAAA So. California

O: 18AUG2019 03:49:55 36.0N 121.0W Md=2.3 EMSC CENTRAL CALIFORNIA

P: 21AUG2019 118010 36.4N 121.0W 2.5-4.3 BAAAA Central California

O: 17AUG2019 11:22:15 37.5N 121.8W Md=2.4 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 13AUG2019 118011 37.3N 121.6W 2.5-4.3 BAAAA Central California

O: 17AUG2019 23:40:42 37.7N 119.0W Md=2.1 EMSC LONG VALLEY AREA, CALIFORNIA

P: 20AUG2019 118007 37.3N 119.4W 2.5-4.3 BAAAA California/Nevada area

O: 17AUG2019 22:52:11 38.0N 121.9W Md=2.2 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 13AUG2019 118011 37.3N 121.6W 2.5-4.3 BAAAA Central California

ALASKA

O: 17AUG2019 20:33:44 54.2N 161.6W mb=4.3 EMSC ALASKA PENINSULA

P: 21AUG2019 118097 54.7N 161.2W 3.5-4.8 BAAAA Unimak Islands, Aleutians

O: 18AUG2019 03:31:20 66.3N 156.9W ML=3.1 EMSC NORTHERN ALASKA

O: 18AUG2019 02:48:38 66.3N 156.9W ML=3.3 EMSC NORTHERN ALASKA

P: 14AUG2019 118107 65.2N 155.4W 3.2-4.8 BBAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 17AUG2019 11:41:53 44.4N 128.5W ML=3.3 EMSC OFF COAST OF OREGON

P: 10AUG2019 117842 43.9N 128.4W 3.0-4.3 CAAAA Off Coast of Oregon

P: 14AUG2019 118067 44.5N 129.8W 3.0-4.4 BABAA Off Coast of Oregon

O: 17AUG2019 12:47:50 47.8N 120.2W Md=2.3 EMSC WASHINGTON

ROCKY MOUNTAINS REGION

O: 18AUG2019 04:02:46 39.3N 112.0W ML=2.5 EMSC UTAH

P: 17AUG2019 118008 38.7N 115.4W 2.5-4.3 AACAA California/Nevada area

EASTERN U.S./CANADA

O: 18AUG2019 03:19:37 35.1N 95.4W mb=2.5 EMSC OKLAHOMA

O: 17AUG2019 23:18:05 35.2N 95.4W ML=3.4 EMSC OKLAHOMA

P: 15AUG2019 118042 35.0N 96.0W 2.0-3.8 AAAAA Southeast U.S.

NEIC reported this earthquake of M 2.6 in Oklahoma was felt with intensity II-III in the area(s) of Quinton and Webbers Falls, Oklahoma.

O: 17AUG2019 15:22:29 36.8N 98.1W mb=2.7 EMSC OKLAHOMA

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

O: 17AUG2019 09:56:35 38.1N 98.0W mb=2.8 EMSC KANSAS

P: 17AUG2019 118042 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains

NEIC reported this earthquake of M 2.8 in Kansas was felt with intensity II-III in the area(s) of Kansas at Hutchinson and South Hutchinson and in Buhler.

HAWAII

O: 17AUG2019 09:46:43 19.0N 156.2W Ml=3.1 EMSC HAWAII REGION, HAWAII

P: 17AUG2019 117971 19.9N 155.4W 3.0-4.4 AAAAA Hawaii

NEIC reported this earthquake of M 3.1 southwest of Hawaii was felt with intensity II-III in the area(s) of southwest of Hawaii at Naalehu.

MODERATE QUAKES OFF OREGON AND IN OKLAHOMA RELATED TO FULL MOON

EARTHQUAKE SUMMARY FOR AUGUST 16, 2019

The strongest earthquake in the U.S. or Canada today was an M 5.4 off the coast of Oregon. NEIC reported it may have been felt lightly in Oregon at Eugene and Medford and in Seattle, Washington. A foreshock to the southeast of the M 5.4 occurred earlier in the day near local solar midnight and may have been promoted by strong tidal stresses associated with the full moon. The last event with M>=3.9 near the foreshock occurred a month ago on July 17, 2019 and prior to that as an M 4.1 on June 26, 2019. Both the event in June and July occurred with the full moon as noted at the time:

"It was also promoted by the full moon as noted in the previous summary" (July 18, 2019)

Forecast 117842 had expected today's event within about 100 km of the epicenter was likely around August 14.

O: 16AUG2019 07:27:00 43.1N 126.6W mb=3.8 EMSC OFF COAST OF OREGON

O: 16AUG2019 07:27:01 43.4N 126.9W MB=3.9 ECAN Eugene, Oregon, USA

P: 10AUG2019 117842 43.9N 128.4W 3.0-4.3 CAAAA Off Coast of Oregon

The mainshock of M 5.4 about 250 km northwest of the foreshock was the strongest in this region since an M 5.9 on June 1, 2015. Forecasts 118067 had expected today's earthquake was likely within about 50 km of the epicenter around August 14. This earthquake is located at the third node (120 degrees) from the M 6.8 in Sumatra of August 2 and was probably promoted by energy from that source

O: 16AUG2019 15:23:19 44.3N 129.4W Mw=5.4 EMSC OFF COAST OF OREGON

P: 14AUG2019 118067 44.5N 129.8W 3.0-4.4 AAAAA Off Coast of Oregon

A moderate earthquake of M 4.7 was widely felt in Kansas today. NEIC reported this event was felt with maximum intensity VI in Hutchinson, Kansas and V in South Hutchinson and IV in Partridge, Nickerson, Buhler and II-III in Haven, Pretty Prairie, Arlington, Kansas. It was probably triggered by high tidal stresses associated with the full moon on August 15. Earthquakes in this section of the U.S. often occur within a couple of days of full and new moons as noted for example, in previous issues of this summary:

"As often occurs, Oklahoma saw enhanced seismic activity today with the strongest in a series of events of M 3.4. It is common for the area to become activated at times of full moons when tidal forces are strong and can affect ground water significantly. At M 3.4, this is the strongest earthquake within about 100 km of this epicenter since an M 3.4 on February 28 and an M 3.8 on February 26, 2019. Forecast 115982 had expected today's activity was likely within about 100 km of these epicenters around May 17." (May 16-17, 2019)

Today's earthquake of M 4.7 is the strongest in Kansas or Oklahoma since an M 5.0 on November 7, 2016 nearly three years ago. Forecasts 118042 and 118043 had expected today's activity was likely around August 16-17. This earthquake is located at 144 degrees from the M 6.8 in Sumatra of August 2 and was probably promoted by energy from that source.

O: 17AUG2019 06:21:03 38.0N 98.0W mb=2.0 EMSC KANSAS

O: 16AUG2019 13:43:06 38.0N 98.0W mb=2.7 EMSC KANSAS

O: 17AUG2019 01:03:37 38.0N 98.0W mb=3.0 EMSC KANSAS

O: 16AUG2019 12:59:09 38.0N 98.0W mb=4.7 EMSC KANSAS

O: 16AUG2019 13:30:56 38.0N 98.1W mb=2.6 EMSC KANSAS

O: 16AUG2019 13:10:49 38.0N 98.1W mb=3.1 EMSC KANSAS

O: 16AUG2019 19:55:41 38.1N 97.9W mb=2.5 EMSC KANSAS

O: 17AUG2019 05:23:48 38.1N 98.0W mb=2.1 EMSC KANSAS

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

P: 17AUG2019 118042 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains

NEIC reported this earthquake of M 3.0 in Kansas was felt with intensity II-III in the area(s) of Kansas at Hutchinson and South Hutchinson, Osborne, Perry, and in Oklahoma at Tulsa and Oklahoma City.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 16AUG2019 10:55:07 37.9N 46.6E ML=4.3 EMSC NORTHWESTERN IRAN

P: 13AUG2019 118026 36.0N 46.0E 3.8-5.2 BBAAA No. Iran

NEIC reported this earthquake of M 4.1 in Northwestern Iran was felt with intensity IV in the area(s) of Northwestern Iran at Tebriz.

O: 16AUG2019 19:58:04 39.7N 77.0E mb=4.3 EMSC SOUTHERN XINJIANG, CHINA

P: 21AUG2019 118059 40.0N 78.0E 4.0-5.3 BAAAA Kirgizstan/Xinjiang

O: 16AUG2019 07:49:14 56.2N 164.8E mb=4.5 EMSC KOMANDORSKIYE OSTROVA REGION

P: 16AUG2019 118090 53.0N 170.0E 4.0-5.5 ACCAA Near Islands

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 17AUG2019 04:00:21 1.6N 124.8E ML=4.1 EMSC MINAHASA, SULAWESI, INDONESIA

P: 13AUG2019 117940 1.0N 126.0E 4.0-5.3 BAAAA Mindanao, Philippines

O: 16AUG2019 19:51:38 2.9N 126.7E ML=4.6 EMSC MOLUCCA SEA

P: 14AUG2019 117939 3.0N 126.0E 4.0-5.3 AAAAA Halmahera

O: 16AUG2019 06:59:43 4.9N 96.0E ML=4.0 EMSC NORTHERN SUMATRA, INDONESIA

P: 16AUG2019 117942 5.0N 93.0E 4.0-5.3 AACAA Nicobar Islands

O: 16AUG2019 17:01:31 6.9S 128.3E ML=4.2 EMSC BANDA SEA

P: 17AUG2019 117946 6.0S 129.0E 4.0-5.3 AAAAA Banda Sea

O: 17AUG2019 05:18:26 7.4S 106.1E ML=4.3 EMSC JAVA, INDONESIA

P: 13AUG2019 117959 9.0S 107.0E 4.0-5.3 BBAAA So. of Java

O: 17AUG2019 04:40:57 8.0S 124.0E ML=4.1 EMSC KEPULAUAN ALOR, INDONESIA

P: 18AUG2019 117951 8.0S 124.0E 4.0-5.3 AAAAA Flores Island area

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 16AUG2019 13:51:49 15.0N 94.3W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 13AUG2019 117966 15.0N 95.0W 3.5-5.0 BAAAA Chiapas, Mexico

O: 16AUG2019 21:30:18 16.7N 94.9W ML=4.5 EMSC OAXACA, MEXICO

P: 18AUG2019 117966 16.0N 94.0W 3.5-5.0 AAAAA Chiapas, Mexico

O: 16AUG2019 17:42:34 16.7N 99.5W ML=4.1 EMSC GUERRERO, MEXICO

P: 20AUG2019 117984 16.0N 100.0W 3.5-5.1 BAAAA Oaxaca, Mexico

O: 16AUG2019 09:28:57 17.9N 68.2W Md=3.2 EMSC DOMINICAN REPUBLIC REGION

O: 16AUG2019 16:43:28 18.2N 68.6W Md=3.1 EMSC MONA PASSAGE, DOMINICAN REPUBL

P: 21AUG2019 117985 19.0N 68.0W 3.4-4.9 BAAAA Puerto Rico

O: 16AUG2019 10:54:27 18.6N 65.0W Md=3.1 EMSC VIRGIN ISLANDS REGION

O: 16AUG2019 09:45:15 18.8N 64.5W Md=3.1 EMSC VIRGIN ISLANDS REGION

P: 14AUG2019 117973 18.0N 65.0W 3.0-4.8 AAAAA Leeward Islands

O: 16AUG2019 23:31:35 18.8N 70.4W ML=3.3 EMSC DOMINICAN REPUBLIC

P: 21AUG2019 117985 19.0N 68.0W 3.4-4.9 BABAA Puerto Rico

O: 16AUG2019 07:53:36 25.0S 68.8W mb=4.4 EMSC ANTOFAGASTA, CHILE

P: 21AUG2019 118129 24.0S 69.0W 4.0-5.3 BAAAA Coast No. Chile

O: 17AUG2019 00:09:24 35.3S 71.0W mb=4.1 EMSC MAULE, CHILE

P: 14AUG2019 118139 35.0S 71.0W 4.0-5.4 BAAAA Central Chile

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 17AUG2019 02:22:07 37.4N 20.4E mb=4.5 EMSC IONIAN SEA

P: 21AUG2019 118023 37.0N 20.0E 3.0-4.4 BAAAA No. Greece

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 17AUG2019 05:26:35 21.0S 178.6W mb=4.6 EMSC FIJI REGION

P: 14AUG2019 118136 23.0S 178.0W 4.0-5.3 BBAAA Tonga Islands

O: 16AUG2019 23:30:07 26.7S 175.8W Mw=5.0 EMSC SOUTH OF TONGA

P: 17AUG2019 118136 27.0S 176.0W 4.0-5.4 AAAAA Tonga Islands

OCEAN RIDGES

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

O: 16AUG2019 07:25:08 30.7S 179.7W mb=4.5 EMSC KERMADEC ISLANDS REGION

P: 18AUG2019 118141 30.0S 178.0W 4.0-5.3 AAAAA No. Kermadec Islands

P: 21AUG2019 118141 30.0S 179.0W 4.0-5.3 BAAAA No. Kermadec Islands

JAPAN AND KURIL ISLANDS

No earthquakes of M>=4 were located in Japan or the Kuril Islands today.

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 16AUG2019 21:14:29 31.8N 115.5W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

P: 14AUG2019 118033 31.9N 116.3W 2.5-4.3 AAAAA So. California

O: 16AUG2019 10:57:00 32.9N 116.3W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 16AUG2019 12:29:55 33.0N 116.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 17AUG2019 118035 32.9N 115.6W 2.5-4.3 AAAAA So. California

O: 16AUG2019 07:45:00 33.4N 116.3W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 11AUG2019 117807 34.1N 117.4W 2.5-4.4 BAAAA So. California

O: 16AUG2019 08:57:32 34.2N 117.5W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 11AUG2019 117807 34.1N 117.4W 2.5-4.4 BAAAA So. California

P: 20AUG2019 118036 34.1N 117.4W 2.5-4.4 BAAAA So. California

O: 17AUG2019 02:10:23 36.1N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 16AUG2019 18:14:25 35.7N 117.5W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 16AUG2019 16:35:53 36.1N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 16AUG2019 15:43:32 35.7N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 16AUG2019 12:00:27 35.4N 117.9W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 16AUG2019 11:27:27 36.2N 117.9W Ml=2.6 EMSC CENTRAL CALIFORNIA

P: 18AUG2019 118005 36.1N 118.1W 2.5-4.5 AAAAA California/Nevada area

ALASKA

O: 16AUG2019 15:14:26 58.0N 137.6W ML=3.1 EMSC OFF COAST OF SOUTHEASTERN ALAS

O: 16AUG2019 15:31:58 58.1N 137.6W ML=3.0 EMSC SOUTHEASTERN ALASKA

P: 15AUG2019 118086 58.3N 138.5W 3.0-4.9 AAAAA British Colombia

O: 16AUG2019 14:53:25 61.5N 147.8W ml=3.4 EMSC SOUTHERN ALASKA

P: 19AUG2019 118104 62.7N 149.3W 3.2-4.9 BBAAA Central Alaska

NEIC reported this earthquake of M 3.4 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Palmer, Chugiak, Eagle River and Anchorage.

O: 16AUG2019 19:58:41 67.7N 163.5W ml=3.2 EMSC NORTHERN ALASKA

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 16AUG2019 07:27:00 43.1N 126.6W mb=3.8 EMSC OFF COAST OF OREGON

O: 16AUG2019 07:27:01 43.4N 126.9W MB=3.9 ECAN Eugene, Oregon, USA

P: 10AUG2019 117842 43.9N 128.4W 3.0-4.3 CAAAA Off Coast of Oregon

O: 16AUG2019 15:23:19 44.3N 129.4W Mw=5.4 EMSC OFF COAST OF OREGON

P: 14AUG2019 118067 44.5N 129.8W 3.0-4.4 AAAAA Off Coast of Oregon

ROCKY MOUNTAINS REGION

O: 16AUG2019 09:35:19 31.7N 104.3W ML=3.0 EMSC WESTERN TEXAS

P: 11AUG2019 117802 31.4N 103.8W 2.0-3.9 BAAAA SW U.S.A

EASTERN U.S./CANADA

O: 16AUG2019 12:36:11 35.1N 95.4W ML=2.2 EMSC OKLAHOMA

O: 16AUG2019 17:43:46 35.1N 95.4W ML=2.6 EMSC OKLAHOMA

O: 16AUG2019 20:11:36 36.3N 97.7W ML=2.0 EMSC OKLAHOMA

O: 17AUG2019 03:24:59 36.8N 97.7W ML=2.3 EMSC OKLAHOMA

O: 16AUG2019 13:28:23 34.8N 97.6W mb=2.6 EMSC OKLAHOMA

P: 15AUG2019 118042 35.0N 96.0W 2.0-3.8 AAAAA Southeast U.S.

O: 17AUG2019 06:21:03 38.0N 98.0W mb=2.0 EMSC KANSAS

O: 16AUG2019 13:43:06 38.0N 98.0W mb=2.7 EMSC KANSAS

O: 17AUG2019 01:03:37 38.0N 98.0W mb=3.0 EMSC KANSAS

O: 16AUG2019 12:59:09 38.0N 98.0W mb=4.7 EMSC KANSAS

O: 16AUG2019 13:30:56 38.0N 98.1W mb=2.6 EMSC KANSAS

O: 16AUG2019 13:10:49 38.0N 98.1W mb=3.1 EMSC KANSAS

O: 16AUG2019 19:55:41 38.1N 97.9W mb=2.5 EMSC KANSAS

O: 17AUG2019 05:23:48 38.1N 98.0W mb=2.1 EMSC KANSAS

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

P: 17AUG2019 118042 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains

HAWAII

No earthquakes of M>=3 were located in Hawaii.

UNUSUAL QUAKES SHAKE CENTRAL NORTH AMERICA

EARTHQUAKE SUMMARY FOR AUGUST 15, 2019

Moderate earthquakes of M 4.1 and 4.2 hit the region of north-central North America today. These events in Western Montana and Manitoba, Canada were lightly felt in their respective epicentral areas. An earthquake of M 3.3 also occurred in southeastern Yellowstone, Wyoming, the strongest in that region in more than 10 years.

The strongest earthquake in the world today was an M 5.5 in the southern Vanuatu Islands near the Loyalty Islands. It occurred near local solar noon and at the time of the full moon and was probably promoted by high tidal stresses associated with that alignment. This is not in the typical area of moderate

to large quakes in this area. The last event east of 172.5E with M>=5.5 occurred as an M 5.8 on November 25, 2017. Forecast 118130 had expected today's event in the area was likely around August 18. This summary had issued the tidal seismicity forecast in the past several issues as:

"The full moon arrives on August 15 at 12:29 UT. Longitudes which are anti-solar at this time include the Southwestern Pacific near 175 East and include the Fiji/Tonga/New Zealand area and the western Aleutians. In the west these longitudes are near 5 West and include western Europe and portions of the Mid-Atlantic Ridge. These area the areas most likely to see tidal triggering in the next week, but tidal triggering is common and can be recognized by the timing of earthquakes near local solar midnight and noon." (August 13-15, 2019)

O: 15AUG2019 10:38:32 20.7S 173.3E Mw=5.5 EMSC VANUATU REGION

P: 18AUG2019 118130 22.0S 169.0E 4.0-5.3 BBCAA Loyalty Islands

Moderate earthquakes of M 4.1 and 4.2 hit the region of north-central North America today. These events in Western Montana and Manitoba, Canada were lightly felt in their respective epicentral areas. The earthquake in western Montana of M 4.2 was accompanied by light shocks and was probably triggered by high tidal stresses associated with the full moon. These are part of a series of Western Montana quakes which have been occurring during August. The M 4.2 is the strongest in this area within about 100 km of these epicenters since an M 4.1 in the area on August 6, 2019 and an M 4.0 with the previous full moon on July 14, 2019. The last event of M>4.2 in the area was an M 5.8 and aftershocks on July 6, 2017. Forecast 118063 had expected today's event was likely around August 16.

NEIC reported this earthquake of M 4.2 in Western Montana was felt with intensity IV in Montana at Three Forks, Manhattan, Belgrade and II-III in the area(s) of Western Montana at Bozeman, Radersburg, Pony, Gallatin, Ennis, and Whitehall. Foreshocks were felt with light intensity in the same area.

O: 16AUG2019 00:01:25 45.9N 111.4W ML=3.4 EMSC WESTERN MONTANA

O: 15AUG2019 23:41:27 45.9N 111.4W Ml=2.4 EMSC WESTERN MONTANA

O: 16AUG2019 00:02:37 45.9N 111.4W Mw=4.2 EMSC WESTERN MONTANA

P: 16AUG2019 118063 45.7N 112.1W 2.0-4.0 AAAAA Montana/Idaho

The earthquake in Manitoba, Canada occurred with M 4.1 about 2.5 hours after the M 4.2 in Montana. NEIC reported this earthquake of M 4.1 in Manitoba, Canada was felt with intensity II-III in the area(s) of Esterhazy, Saskatchewan, Canada. It was also likely promoted by high tidal stress accompanying the full moon. Two other earthquakes of M>=4 have hit within about 300 km of this epicenter in the past 30 years - an M 4.1 on February 1, 2012 and an M 4.4 on April 14, 2010.

O: 16AUG2019 02:30:46 50.7N 101.8W mb=4.1 EMSC MANITOBA, CANADA

An M 3.3 also occurred in southeastern Yellowstone, Wyoming today. It occurred within minutes of local solar noon a time when tidal stresses are greatest with the full moon. The M 3.3 is the strongest within about 50 km of this epicenter since an M 4.0 11 years ago on December 31, 2008. Forecast 118079 had expected today's event within about 10 km of this epicenter was likely around August 21.

O: 15AUG2019 08:29:50 44.0N 110.3W Ml=2.0 EMSC WYOMING

O: 15AUG2019 19:46:39 44.1N 110.4W ML=3.3 EMSC WYOMING

P: 21AUG2019 118079 44.2N 110.3W 2.0-3.9 CAAAA Yellowstone/Wyoming

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 15AUG2019 21:41:40 23.6N 120.7E ML=4.6 EMSC TAIWAN

O: 15AUG2019 21:41:40 23.6N 120.7E ML=4.6 TAI Hualien, Taiwan

P: 19AUG2019 118001 23.0N 121.0E 4.0-5.3 BAAAA Taiwan

CWB reported this earthquake was felt with intensity IV in Yunlin, Chiayi, Changhua, III in Nantou, Taichung; II in Kaohsiung, Tainan, Hualien and Penghu and I in Taitung, Miaoli, Hsinchu and Yilan Counties, Taiwan.

O: 16AUG2019 02:09:19 36.4N 70.8E mb=5.2 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 15AUG2019 118017 36.0N 72.0E 3.8-5.2 AAAAA Hindu Kush/Pakistan

NEIC reported this earthquake of M 5.2 in Hindu Kush, Afghanistan was felt with intensity IV in Pakistan in Shinpokh and II-III in the area(s) of Afghanistan a Mahmoud Raqui, Jalal Abad, Kabul, and in Rawalpindi and Lahore, Pakistan.

O: 15AUG2019 07:24:41 56.3N 164.0E mb=4.4 EMSC NEAR EAST COAST OF KAMCHATKA

P: 4AUG2019 117864 56.0N 166.0E 4.0-5.5 DABAA Komandorsky Isl

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 15AUG2019 08:17:54 5.2N 126.4E ML=4.6 EMSC MINDANAO, PHILIPPINES

P: 19AUG2019 117939 4.0N 127.0E 4.0-5.3 BBAAA Halmahera

O: 15AUG2019 12:13:37 7.0S 104.9E ML=4.7 EMSC SUNDA STRAIT, INDONESIA

P: 15AUG2019 117961 6.0S 102.0E 4.0-5.5 AACAA So. of Sumatera

O: 15AUG2019 14:00:32 10.2S 118.8E ML=4.0 EMSC SOUTH OF SUMBAWA, INDONESIA

P: 21AUG2019 117951 7.0S 120.0E 4.0-5.3 CCBAA Flores Island area

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 15AUG2019 16:06:50 8.3S 75.1W mb=4.8 EMSC CENTRAL PERU

P: 18AUG2019 117947 9.0S 75.0W 3.5-5.0 BAAAA Brazil

O: 15AUG2019 11:01:11 16.6N 98.3W mb=4.2 EMSC GUERRERO, MEXICO

P: 18AUG2019 117983 16.0N 98.0W 3.5-5.2 BAAAA Oaxaca, Mexico

NEIC reported this earthquake of M 4.2 in Guerrero, Mexico was felt with intensity V in Ometepec, Guerrero, Mexico and II-III in the area(s) of Guerrero at Cuajinicuilapa, San Marcos, near Mexico City at Mexico City, Naucalpan and Tlanepantla and in Oaxaca at Pinotepa and Amuzgos and Cacahuatepec, Mexico.

O: 15AUG2019 20:57:16 17.3N 94.9W ML=4.0 EMSC VERACRUZ, MEXICO

P: 18AUG2019 117966 16.0N 94.0W 3.5-5.0 BBAAA Chiapas, Mexico

O: 15AUG2019 16:42:48 17.8N 68.5W ML=3.1 EMSC DOMINICAN REPUBLIC REGION

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 CAAAA Puerto Rico

O: 15AUG2019 09:56:03 22.8S 66.8W ML=4.1 EMSC JUJUY, ARGENTINA

O: 15AUG2019 08:40:41 23.7S 66.8W ML=4.1 EMSC JUJUY, ARGENTINA

P: 13AUG2019 118127 24.0S 66.0W 4.0-5.3 AAAAA Argentina

O: 16AUG2019 04:44:53 25.7N 110.0W ML=4.5 EMSC GULF OF CALIFORNIA

P: 14AUG2019 117992 24.0N 109.0W 3.5-4.8 ABAAA Gulf of California

O: 15AUG2019 14:23:41 29.9S 72.1W Mw=5.0 EMSC OFFSHORE COQUIMBO, CHILE

O: 15AUG2019 14:43:37 29.9S 72.1W mb=4.4 EMSC OFFSHORE COQUIMBO, CHILE

P: 17AUG2019 118140 30.0S 70.0W 4.0-5.3 AABAA Coast Central Chile

AFRICA AND EUROPE

O: 15AUG2019 07:00:11 64.5N 16.2W ML=3.0 EMSC ICELAND

P: 15AUG2019 118109 66.0N 17.0W 3.0-4.3 ABAAA Iceland area

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 16AUG2019 03:19:02 15.6S 173.7W mb=4.6 EMSC TONGA

P: 15AUG2019 118124 16.0S 174.0W 4.0-5.3 AAAAA Tonga Islands

O: 15AUG2019 08:08:18 16.2S 168.1E mb=4.5 EMSC VANUATU

P: 10AUG2019 117903 14.0S 167.0E 4.0-5.3 BCAAA Vanuatu Islands

O: 15AUG2019 10:38:32 20.7S 173.3E Mw=5.5 EMSC VANUATU REGION

P: 18AUG2019 118130 22.0S 169.0E 4.0-5.3 BBCAA Loyalty Islands

OCEAN RIDGES

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 15AUG2019 09:07:36 38.6N 142.3E mb=4.9 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 17AUG2019 118029 38.0N 141.0E 4.0-5.3 AAAAA Off East Coast Honshu

O: 16AUG2019 04:37:50 41.5N 140.9E mb=4.3 EMSC HOKKAIDO, JAPAN REGION

P: 10AUG2019 117827 42.0N 142.0E 3.5-5.3 CAAAA Hokkaido, Japan

O: 15AUG2019 09:15:04 42.1N 143.7E mb=4.8 EMSC HOKKAIDO, JAPAN REGION

P: 15AUG2019 118056 41.0N 143.0E 3.5-5.3 ABAAA Hokkaido, Japan

O: 15AUG2019 13:54:31 46.0N 152.1E mb=4.8 EMSC KURIL ISLANDS

O: 16AUG2019 04:31:55 46.4N 152.5E mb=4.9 EMSC KURIL ISLANDS

P: 6AUG2019 117851 47.0N 151.0E 3.5-5.3 CAAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 15AUG2019 18:22:45 33.0N 116.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 17AUG2019 118035 32.9N 115.6W 2.5-4.3 AAAAA So. California

O: 15AUG2019 17:00:19 33.8N 117.5W Ml=2.1 EMSC GREATER LOS ANGELES AREA, CALI

O: 15AUG2019 15:59:20 33.8N 118.1W Ml=2.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 14AUG2019 118036 34.2N 117.8W 2.5-4.3 AAAAA So. California

O: 15AUG2019 18:26:11 35.2N 118.9W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 16AUG2019 02:24:11 35.8N 118.5W ML=2.4 EMSC CENTRAL CALIFORNIA

P: 14AUG2019 118038 35.3N 118.6W 2.5-4.5 AAAAA So. California

O: 15AUG2019 09:14:47 36.3N 120.4W Ml=3.2 EMSC CENTRAL CALIFORNIA

P: 18AUG2019 118011 36.6N 120.7W 2.5-4.3 BAAAA Central California

O: 16AUG2019 05:28:12 38.8N 122.8W Md=2.7 EMSC NORTHERN CALIFORNIA

P: 15AUG2019 118013 38.8N 122.8W 2.5-4.3 AAAAA Central California

NEIC reported this earthquake of M 2.7 in the California Geysers was felt with intensity II-III in the area(s) of the California Geysers at Kelseyville and Middletown.

O: 15AUG2019 13:06:02 40.7N 121.5W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 14AUG2019 118013 39.8N 123.5W 2.5-4.3 AABAA Central California

O: 16AUG2019 00:56:14 35.6N 117.4W ML=3.1 EMSC SOUTHERN CALIFORNIA

O: 15AUG2019 21:27:04 36.0N 117.7W ML=2.5 EMSC CENTRAL CALIFORNIA

O: 15AUG2019 20:44:59 35.6N 117.4W Ml=3.0 EMSC SOUTHERN CALIFORNIA

O: 15AUG2019 19:22:03 36.1N 117.9W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 15AUG2019 18:49:24 35.7N 117.5W Ml=2.6 EMSC SOUTHERN CALIFORNIA

O: 15AUG2019 17:06:37 35.7N 117.5W Ml=2.6 EMSC SOUTHERN CALIFORNIA

O: 15AUG2019 14:24:33 36.1N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 15AUG2019 12:32:40 36.1N 117.9W Ml=2.7 EMSC CENTRAL CALIFORNIA

O: 15AUG2019 11:52:31 36.1N 117.9W Ml=3.0 EMSC CENTRAL CALIFORNIA

O: 15AUG2019 11:50:24 36.1N 117.9W Mw=3.9 EMSC CENTRAL CALIFORNIA

O: 16AUG2019 04:01:27 36.1N 117.9W ML=3.1 EMSC CENTRAL CALIFORNIA

P: 16AUG2019 118039 35.8N 117.6W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 3.9 in Coso Junction, California was felt with intensity II-III in the area(s) of Ridgecrest, Wofford Heights, Fish Camp, California.

ALASKA

O: 15AUG2019 17:52:55 51.3N 178.1W mb=3.9 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 13AUG2019 118083 51.6N 177.6W 3.5-4.8 AAAAA Andreanoff Isls, Aleutians

O: 15AUG2019 11:57:23 55.0N 156.7W ml=3.6 EMSC SOUTH OF ALASKA

P: 13AUG2019 118080 54.7N 156.9W 3.5-4.8 AAAAA Alaska Peninsula

O: 15AUG2019 17:06:22 59.3N 152.1W ML=3.1 EMSC SOUTHERN ALASKA

P: 17AUG2019 118102 60.2N 151.7W 3.2-4.9 AAAAA Central Alaska

O: 16AUG2019 06:03:02 68.9N 146.9W ML=3.4 EMSC NORTHERN ALASKA

P: 17AUG2019 118108 69.2N 144.4W 3.2-4.8 AAAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

O: 15AUG2019 16:49:37 37.0N 113.5W ML=2.8 EMSC ARIZONA

P: 17AUG2019 118008 37.8N 115.8W 2.5-4.3 AABAA California/Nevada area

NEIC reported this earthquake of M 2.8 in Arizona was felt with intensity II-III in the area(s) of Saint George, Utah.

O: 15AUG2019 08:29:50 44.0N 110.3W Ml=2.0 EMSC WYOMING

O: 15AUG2019 19:46:39 44.1N 110.4W ML=3.3 EMSC WYOMING

P: 21AUG2019 118079 44.2N 110.3W 2.0-3.9 CAAAA Yellowstone/Wyoming

O: 16AUG2019 00:01:25 45.9N 111.4W ML=3.4 EMSC WESTERN MONTANA

O: 15AUG2019 23:41:27 45.9N 111.4W Ml=2.4 EMSC WESTERN MONTANA

O: 16AUG2019 00:02:37 45.9N 111.4W Mw=4.2 EMSC WESTERN MONTANA

P: 16AUG2019 118063 45.7N 112.1W 2.0-4.0 AAAAA Montana/Idaho

O: 16AUG2019 02:30:46 50.7N 101.8W mb=4.1 EMSC MANITOBA, CANADA

EASTERN U.S./CANADA

O: 15AUG2019 12:54:16 35.1N 95.3W mb=2.7 EMSC OKLAHOMA

O: 15AUG2019 08:26:11 35.2N 96.0W ML=2.2 EMSC OKLAHOMA

P: 15AUG2019 118042 35.0N 96.0W 2.0-3.8 AAAAA Southeast U.S.

NEIC reported this earthquake of M 2.8 in Oklahoma was felt with intensity II-III in the area(s) of Kinta, Oklahoma.

O: 15AUG2019 05:02:58 46.0N 75.5W MB=1.4 ECAN Val-des-Bois, QC

P: 14AUG2019 118065 46.0N 75.0W 2.0-3.8 AAAAA New York State

O: 15AUG2019 01:03:20 49.7N 65.8W MB=1.9 ECAN Moisie, QC

P: 16AUG2019 118054 49.0N 66.0W 2.0-3.9 AAAAA E. of Maine

HAWAII

No earthquakes of M>=3 were located in Hawaii.

CYCLONES TRIGGER QUAKES IN JAPAN; MEXICO

EARTHQUAKE SUMMARY FOR AUGUST 14, 2019

Two Tropical Cyclones have been active over the past several days. These were located in the area of Mexico near the Revilla Gigedo Islands and in Honshu, Japan making landfall on southern Honshu. The largest earthquakes in the world were M 5.8-5.9 in the Mexican Revilla Gigedo Islands and an M 5.4 off the coast of Honshu, Japan. Coincidences such as this are major data supporting the hypothesis that such ocean storms can help trigger regional seismicity.

The strongest earthquake recorded in the world today was an M 5.8-5.9 off western Mexico in the Revilla Gigedo Islands region. NEIC reported it was felt with intensity III San Lucas, Baja California, Mexico. It may have been triggered by the passage of Tropical Storm Henriette which passed over this epicenter two days ago as noted in this summary at the time:

TD 09E 2019-08-12 00:00 UT 18.7N 109.2W 40 kts South of Western Mexico

TS HENRIETTE 2019-08-13 00:00 UT 20.5N 113.7W 45 kts South of Western Mexico

TS Henriette (TD 09E) continued today in the area south of Mexico with winds up to 40 kts. It is expected to track to the west and not to encounter land at this time. No seismic watch is likely with this storm." (August 11-13, 2019)

The last earthquake of M>=5.9 within about 200 km of today's epicenter in the Revilla Gigedo Islands, Mexico occurred as an M 6.3 on November 1, 2011. Forecasts 117968 and 117992 had expected today's event within about 50 km of the epicenter was likely around August 14-17. Earthquakes in this area can stress faults to the north, but as this was triggered by TS Henriette, this is much less likely to trigger additional seismicity in the Gulf of California. This epicenter is at 144 degrees from the M 6.8 in Sumatra of August 2 and may have been promoted from that source.

O: 14AUG2019 21:35:19 20.5N 109.2W Mw=5.9 EMSC REVILLA GIGEDO ISLANDS REGION

P: 14AUG2019 117968 19.0N 109.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

P: 17AUG2019 117992 20.0N 109.0W 3.5-4.8 BAAAA Gulf of California

A moderately strong earthquake today occurred as an M 5.4 off the coast of eastern Honshu, Japan. It was reported with intensity V in Aomori; III in Iwate and II in Miyagi, Japan. This may have been triggered by the arrival in southern Japan of Typhoon Krosa as expected in previous issues of this summary:

Typhoon KROSA (11W) continued today west of the Bonin Islands, Japan with winds up to 65 kts. It is expected to track to the north and possibly to make landfall near Kyushu, Japan around August 15. Some seismic increases may be expected in the Mariana and Volcano Islands and later in western Honshu, Japan over the next several days. These areas are currently under a seismic watch through mid-August.

This is the strongest earthquake off northern Honshu within about 200 km of this epicenter since an M 5.4 on April 22, 2019. Two earthquakes in this region in the past year have exceeded this magnitude - an M 6.1 on April 11, 2019 and an M 5.7 on October 25, 2018. Forecasts 117827 and 118056 had expected this activity within this area was likely around August 10-15.

O: 15AUG2019 05:32:53 40.9N 141.2E Mw=5.4 EMSC NEAR EAST COAST OF HONSHU, JAP

O: 15AUG2019 06:06:09 41.0N 141.1E mb=4.7 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 10AUG2019 117827 42.0N 142.0E 3.5-5.3 BAAAA Hokkaido, Japan

P: 15AUG2019 118056 41.0N 143.0E 3.5-5.3 AABAA Hokkaido, Japan

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 14AUG2019 17:24:30 27.7N 86.3E ML=4.3 EMSC NEPAL

P: 16AUG2019 118047 30.0N 82.0E 3.8-5.1 ACCAA Xizang

O: 14AUG2019 08:13:54 30.4N 94.8E mb=5.0 EMSC EASTERN XIZANG

O: 14AUG2019 23:47:05 30.4N 94.9E mb=4.9 EMSC EASTERN XIZANG

P: 14AUG2019 118048 33.0N 92.0E 3.8-5.1 ACBAA Xizang

O: 14AUG2019 19:01:10 55.0N 164.7E mb=4.5 EMSC KOMANDORSKIYE OSTROVA REGION

P: 4AUG2019 117864 56.0N 166.0E 4.0-5.5 CAAAA Komandorsky Isl

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 14AUG2019 22:43:05 1.9N 128.2E mb=4.6 EMSC HALMAHERA, INDONESIA

P: 11AUG2019 117715 1.0N 126.0E 4.0-5.3 BABAA Mindanao, Philippines

O: 14AUG2019 18:37:25 3.0N 126.9E ML=4.0 EMSC MOLUCCA SEA

P: 14AUG2019 117939 3.0N 126.0E 4.0-5.3 AAAAA Halmahera

O: 14AUG2019 21:56:26 4.5N 95.1E mb=4.6 EMSC NORTHERN SUMATRA, INDONESIA

P: 16AUG2019 117942 5.0N 93.0E 4.0-5.3 AABAA Nicobar Islands

O: 14AUG2019 18:38:53 7.2S 129.4E ML=4.5 EMSC KEPULAUAN BABAR, INDONESIA

O: 14AUG2019 07:56:38 8.5S 128.3E ML=4.7 EMSC TIMOR SEA

P: 14AUG2019 117946 7.0S 130.0E 4.0-5.3 AAAAA Banda Sea

CENTRAL AND SOUTH AMERICA

O: 14AUG2019 19:11:57 14.8N 93.8W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 14AUG2019 08:39:38 14.9N 92.9W ML=4.3 EMSC OFFSHORE CHIAPAS, MEXICO

P: 8AUG2019 117740 14.0N 92.0W 3.5-5.1 CAAAA Guatemala

P: 13AUG2019 117970 16.0N 92.0W 3.5-5.0 ABAAA Guatemala

O: 15AUG2019 01:48:39 15.5N 95.7W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

P: 13AUG2019 117966 15.0N 95.0W 3.5-5.0 AAAAA Chiapas, Mexico

O: 14AUG2019 20:39:01 16.4N 94.6W ML=4.1 EMSC OAXACA, MEXICO

P: 13AUG2019 117966 15.0N 95.0W 3.5-5.0 ABAAA Chiapas, Mexico

O: 15AUG2019 02:26:56 18.3N 64.7W Md=3.1 EMSC VIRGIN ISLANDS REGION

P: 14AUG2019 117973 18.0N 65.0W 3.0-4.8 AAAAA Leeward Islands

O: 14AUG2019 12:23:07 18.6S 69.6W ML=4.0 EMSC TARAPACA, CHILE

P: 21AUG2019 118122 19.0S 69.0W 4.0-5.3 CAAAA So. Peru/Bolivia

O: 14AUG2019 17:32:53 19.0N 64.3W Md=3.4 EMSC VIRGIN ISLANDS REGION

P: 14AUG2019 117973 18.0N 65.0W 3.0-4.8 AAAAA Leeward Islands

O: 15AUG2019 03:15:35 19.0N 67.5W Md=3.0 EMSC PUERTO RICO REGION

P: 15AUG2019 117985 18.0N 66.0W 3.4-4.8 AABAA Puerto Rico

O: 14AUG2019 21:35:19 20.5N 109.2W Mw=5.9 EMSC REVILLA GIGEDO ISLANDS REGION

P: 14AUG2019 117968 19.0N 109.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

P: 17AUG2019 117992 20.0N 109.0W 3.5-4.8 BAAAA Gulf of California

O: 14AUG2019 21:33:10 20.7S 70.1W mb=4.4 EMSC TARAPACA, CHILE

P: 14AUG2019 118135 20.0S 69.0W 4.0-5.4 AAAAA So. Peru/Bolivia

NEIC reported this earthquake of M 4.4 in Northern Chile was felt with intensity II-III in the area(s) of Arica, Tarapaca, Chile.

O: 15AUG2019 06:25:52 24.3S 67.2W Mw=4.9 EMSC SALTA, ARGENTINA

O: 15AUG2019 02:36:28 24.3S 67.4W ML=4.0 EMSC SALTA, ARGENTINA

P: 13AUG2019 118127 24.0S 66.0W 4.0-5.3 AAAAA Argentina

O: 14AUG2019 11:42:43 32.0S 71.5W ML=3.8 EMSC OFFSHORE COQUIMBO, CHILE

P: 16AUG2019 118138 32.0S 69.0W 4.0-5.6 AABAA Central Chile

AFRICA AND EUROPE

O: 14AUG2019 13:54:22 39.4N 19.9E ML=4.0 EMSC KERKIRA REGION, GREECE

P: 15AUG2019 118070 41.0N 20.0E 3.0-4.9 ABAAA Romania/NW Turkey

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 14AUG2019 19:46:49 18.0S 178.4W mb=4.6 EMSC FIJI REGION

P: 17AUG2019 118124 18.0S 179.0W 4.0-5.3 BAAAA Tonga Islands

OCEAN RIDGES

O: 15AUG2019 06:24:31 13.1N 50.3E mb=4.6 EMSC GULF OF ADEN

P: 16AUG2019 117965 15.0N 54.0E 3.5-4.8 ABCAA Gulf of Aden

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

O: 14AUG2019 11:00:08 31.2S 177.3W mb=4.8 EMSC KERMADEC ISLANDS REGION

P: 14AUG2019 118144 32.0S 179.0W 4.0-5.3 AABAA So. Kermadec Islands

P: 18AUG2019 118141 30.0S 178.0W 4.0-5.3 BBAAA No. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 15AUG2019 05:32:53 40.9N 141.2E Mw=5.4 EMSC NEAR EAST COAST OF HONSHU, JAP

O: 15AUG2019 06:06:09 41.0N 141.1E mb=4.7 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 10AUG2019 117827 42.0N 142.0E 3.5-5.3 BAAAA Hokkaido, Japan

P: 15AUG2019 118056 41.0N 143.0E 3.5-5.3 AABAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 14AUG2019 11:36:27 32.9N 115.5W ML=2.0 EMSC SOUTHERN CALIFORNIA

P: 14AUG2019 118033 32.4N 115.8W 2.5-4.4 AAAAA So. California

O: 14AUG2019 20:16:43 34.0N 118.1W Ml=2.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 14AUG2019 118036 34.2N 117.8W 2.5-4.3 AAAAA So. California

O: 14AUG2019 07:53:33 36.6N 121.2W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 17AUG2019 118011 36.8N 121.3W 2.5-4.3 BAAAA Central California

O: 14AUG2019 07:59:32 37.0N 118.2W ML=2.3 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 15:00:01 37.0N 118.3W MD=2.4 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 21:15:26 37.0N 118.3W MD=2.7 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 15:03:45 37.0N 118.3W Md=2.4 EMSC CENTRAL CALIFORNIA

P: 14AUG2019 118006 37.4N 118.6W 2.5-4.3 AAAAA California/Nevada area

O: 14AUG2019 07:45:08 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 15AUG2019 118013 38.8N 122.8W 2.5-4.3 AAAAA Central California

O: 15AUG2019 06:26:23 35.6N 117.5W Ml=2.7 EMSC SOUTHERN CALIFORNIA

O: 15AUG2019 00:12:49 35.8N 117.6W Ml=2.9 EMSC SOUTHERN CALIFORNIA

O: 14AUG2019 23:32:45 36.0N 117.4W Ml=3.2 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 22:52:26 36.1N 117.9W ML=3.5 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 22:41:26 36.1N 117.9W Ml=2.7 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 22:01:11 36.1N 117.9W ML=2.5 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 21:04:11 35.9N 117.7W Mw=3.8 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 09:38:50 35.9N 117.7W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 09:34:19 35.9N 117.7W Mw=3.6 EMSC CENTRAL CALIFORNIA

O: 14AUG2019 07:57:47 36.1N 117.9W Ml=2.1 EMSC CENTRAL CALIFORNIA

P: 13AUG2019 118005 36.0N 117.7W 2.5-4.5 AAAAA California/Nevada area

ALASKA

O: 14AUG2019 07:28:51 60.5N 140.8W ml=3.1 EMSC SOUTHERN YUKON TERRITORY, CANA

P: 9AUG2019 117875 60.0N 139.0W 3.2-4.8 BAAAA Central Alaska

P: 15AUG2019 118096 58.0N 139.0W 3.0-4.4 ACAAA Southeast Alaska

NEIC reported this earthquake of M 3.0 in Southern Alaska was felt with intensity II-III in the area(s) of Wasilla and Palmer, Alaska.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 14AUG2019 01:08:35 58.4N 136.6W MB=4.9 ECAN OF JUNEAU, AK

P: 15AUG2019 118086 58.3N 138.5W 3.0-4.9 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 15AUG2019 01:57:22 31.7N 104.3W ML=2.8 EMSC WESTERN TEXAS

P: 11AUG2019 117802 31.4N 103.8W 2.0-3.9 BAAAA SW U.S.A

O: 14AUG2019 07:00:45 44.8N 111.2W Ml=2.4 EMSC WESTERN MONTANA

P: 21AUG2019 118079 44.8N 111.9W 2.0-3.8 CAAAA Yellowstone/Wyoming

O: 15AUG2019 06:19:18 47.2N 113.2W ML=2.7 EMSC WESTERN MONTANA

P: 13AUG2019 118079 46.4N 111.4W 2.0-4.0 AABAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 15AUG2019 03:46:18 35.8N 98.1W ML=2.1 EMSC OKLAHOMA

P: 13AUG2019 118043 36.0N 97.0W 2.0-4.1 AAAAA Southern Plains

O: 14AUG2019 13:44:36 38.0N 98.0W mb=2.4 EMSC KANSAS

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

O: 14AUG2019 09:07:18 44.7N 78.4W MB=1.8 ECAN Bobcaygeon, ON

P: 8AUG2019 117837 43.0N 78.0W 2.0-3.8 CBAAA New York State

O: 13AUG2019 16:47:27 47.7N 69.9W MB=1.3 ECAN Charlevoix Seismic Zone

P: 14AUG2019 118061 47.0N 69.0W 2.0-3.9 AAAAA Maine

HAWAII

No earthquakes of M>=3 were located in Hawaii.

MODERATE QUAKE SHAKES SOUTHEASTERN ALASKA

EARTHQUAKE SUMMARY FOR AUGUST 13, 2019

The strongest earthquake in the U.S. or Canada today was an M 4.5-4.9 in Southeastern Alaska. NEIC reported it was felt with intensity II-III in Alaska at Gustavus and Douglas. This is the strongest in the current series of events in southeastern Alaska which began after the geomagnetic storm of August 5-6 and was reported in this summary at the time as:

"The activity off the coast of southeastern Alaska also continued today. This may have been promoted by the geomagnetic storm and included the largest event in the current swarm - an M 4.0. The last earthquake within about 200 km of today's epicenter with M>=4 occurred on September 21, 2017 (M 4.0) and before that on August 18, 2017 also with M 4.0. Forecast 117872 had expected today's activity was likely around August 5." (August 6-7. 2019).

"The geomagnetic field saw minor to major storm conditions today. The AP level was 35. High latitude geomagnetic field saw major storm conditions with AP at 61. This is the greatest disturbance in the geomagnetic field since AP reached 36 on May 14, 2019. The last storm of significantly larger AP occurred nearly a year ago on August 26, 2008 when AP reached 76 and high latitude AP was 90. Seismic increases are likely at high latitudes and within about 15 degrees of the geomagnetic equator beginning August 6 through August 11 due to triggering effects from this storm. The most likely timing of a strong to major event is August 10-12, the most likely regions - Indonesia and southeastern Alaska." (August 6-8, 2019)

The last earthquake within about 200 km of today's epicenter with M>=4.9 in Southeastern Alaska occurred two years ago on September 16, 2017, an M 5.1 aftershock of an M 6.3 of May 1, 2017. Forecast 1218086 had expected today's event was likely around August 15.

O: 14AUG2019 01:08:28 58.1N 137.7W Mw=4.5 EMSC SOUTHEASTERN ALASKA

O: 14AUG2019 01:08:35 58.4N 136.6W MB=4.9 ECAN OF JUNEAU, AK

P: 5AUG2019 117872 58.0N 136.0W 3.0-4.4 CAAAA Southeast Alaska

P: 15AUG2019 118086 58.3N 138.5W 3.0-4.9 AAAAA British Colombia

An earthquake of M 5.2 in the Bouvet Island Region of the South Atlantic occurred today. This is the strongest earthquake within about 200 km of this epicenter in the Bouvet Islands since an M 5.3 on March 6, 2019. The last of significantly larger magnitude in the Bouvet area was an 6.5 on December 13, 2017. Forecast 118151 had expected this activity within about 100 km of this epicenter in mid-August. This epicenter is antipodal to the Rat Islands and the western Andreanof Islands in the Aleutians. A sympathetic antipodal moderate earthquake in this region may occur in the next several days.

O: 14AUG2019 03:02:26 54.7S 0.8W mb=5.2 EMSC BOUVET ISLAND REGION

P: 21AUG2019 118151 55.0S 2.0E 4.0-5.3 CABAA Atlantic-Indian Ridge

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 13AUG2019 10:50:09 34.6N 77.8E ML=4.2 EMSC EASTERN KASHMIR

P: 21AUG2019 118027 35.0N 75.0E 3.8-5.1 CABAA Northern India

O: 13AUG2019 23:31:08 34.9N 56.5E mb=4.5 EMSC CENTRAL IRAN

P: 9AUG2019 117810 31.0N 57.0E 3.8-5.1 BCAAA So. Iran

O: 13AUG2019 22:57:19 37.7N 72.2E mb=4.1 EMSC TAJIKISTAN

P: 18AUG2019 118017 37.0N 72.0E 3.8-5.1 BAAAA Hindu Kush/Pakistan

O: 13AUG2019 07:21:07 41.3N 78.8E mb=4.1 EMSC SOUTHERN XINJIANG, CHINA

P: 21AUG2019 118059 40.0N 78.0E 4.0-5.3 CBAAA Kirgizstan/Xinjiang

O: 13AUG2019 07:16:07 56.1N 163.7E mb=4.4 EMSC NEAR EAST COAST OF KAMCHATKA

P: 4AUG2019 117864 56.0N 166.0E 4.0-5.5 CABAA Komandorsky Isl

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 14AUG2019 02:50:02 0.9S 128.3E ML=4.5 EMSC HALMAHERA, INDONESIA

P: 17AUG2019 117949 1.0S 127.0E 4.0-5.3 BAAAA Ceram area

O: 14AUG2019 02:17:10 1.1N 124.2E ML=4.2 EMSC MINAHASA, SULAWESI, INDONESIA

P: 17AUG2019 117940 0.0N 124.0E 4.0-5.3 BBAAA Mindanao, Philippines

O: 13AUG2019 08:47:14 1.3N 128.2E ML=4.0 EMSC HALMAHERA, INDONESIA

P: 13AUG2019 117940 1.0N 126.0E 4.0-5.3 AABAA Mindanao, Philippines

O: 13AUG2019 18:38:38 3.1S 101.3E mb=5.1 EMSC SOUTHERN SUMATRA, INDONESIA

P: 5AUG2019 117731 2.0S 101.0E 4.0-5.3 CBAAA So. of Sumatera

O: 13AUG2019 17:47:42 4.5N 97.8E ML=4.1 EMSC NORTHERN SUMATRA, INDONESIA

P: 6AUG2019 117716 5.0N 97.0E 4.0-5.3 CAAAA Nicobar Islands

O: 13AUG2019 18:48:22 8.9S 124.1E mb=4.7 EMSC KEPULAUAN ALOR, INDONESIA

P: 18AUG2019 117951 8.0S 124.0E 4.0-5.3 BAAAA Flores Island area

O: 13AUG2019 22:12:40 9.1N 126.1E mb=4.6 EMSC MINDANAO, PHILIPPINES

P: 17AUG2019 117936 9.0N 126.0E 4.0-5.3 BAAAA Central Philippines

O: 13AUG2019 13:40:09 9.8S 114.0E mb=4.8 EMSC SOUTH OF JAVA, INDONESIA

O: 13AUG2019 10:21:31 9.9S 113.9E mb=4.8 EMSC SOUTH OF JAVA, INDONESIA

P: 6AUG2019 117729 9.0S 114.0E 4.0-5.3 CAAAA So. of Bali

P: 15AUG2019 117960 9.0S 114.0E 4.0-5.3 AAAAA So. of Java

NEIC reported this earthquake of M 4.9 South of Bali, Indonesia was felt with intensity II-III in the area(s) of South of Bali, Indonesia at Kuta.

O: 14AUG2019 01:39:41 19.5N 145.7E mb=4.5 EMSC MAUG ISLANDS REG, N. MARIANA I

P: 11AUG2019 117768 23.0N 143.0E 4.0-5.3 BCCAA Volcano Islands

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 13AUG2019 23:11:30 9.5N 84.5W ML=4.1 EMSC COSTA RICA

P: 5AUG2019 117713 9.0N 84.0W 3.5-4.9 CAAAA Costa Rica

O: 13AUG2019 15:50:04 10.2S 77.2W mb=5.0 EMSC NEAR COAST OF CENTRAL PERU

P: 14AUG2019 118117 10.0S 75.0W 3.5-5.1 AABAA Brazil

NEIC reported this earthquake of M 5.1 off the coast of Central Peru was felt with maximum intensity VI in Huallanca, and IV in Huaraz, Ancash and Barranca, Lima, Peru and intensity II-III in the area(s) off the coast of Central Peru Huanuco, Lima, San Luis and Trujillo La Libertad.

O: 14AUG2019 01:14:32 13.8N 92.1W ML=4.2 EMSC OFFSHORE GUATEMALA

O: 13AUG2019 15:30:55 14.5N 92.7W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 13AUG2019 117970 16.0N 92.0W 3.5-5.0 ABAAA Guatemala

O: 14AUG2019 06:32:37 15.5N 94.9W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 13AUG2019 10:00:30 16.1N 94.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 13AUG2019 117966 15.0N 95.0W 3.5-5.0 AAAAA Chiapas, Mexico

O: 14AUG2019 00:10:01 18.2N 72.0W ML=3.3 EMSC HAITI REGION

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 CAAAA Puerto Rico

O: 13AUG2019 12:59:39 18.5N 69.0W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 BAAAA Puerto Rico

O: 14AUG2019 02:27:26 19.0N 64.1W Md=3.4 EMSC VIRGIN ISLANDS REGION

P: 14AUG2019 117973 18.0N 65.0W 3.0-4.8 AAAAA Leeward Islands

O: 13AUG2019 17:51:32 19.3N 73.5W ML=3.2 EMSC HAITI REGION

O: 13AUG2019 22:27:29 19.6N 70.8W ML=3.2 EMSC DOMINICAN REPUBLIC

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 CAAAA Puerto Rico

NEIC reported this earthquake of M 3.2 in the Dominican Republic was felt with intensity II-III in the area(s) of the Dominican Republic at Santiago.

O: 13AUG2019 11:13:42 25.5S 70.9W Mw=4.0 EMSC OFFSHORE ANTOFAGASTA, CHILE

P: 11AUG2019 117907 24.0S 69.0W 4.0-5.3 ABBAA Coast No. Chile

O: 13AUG2019 07:46:14 40.2S 72.0W ML=4.3 EMSC LOS LAGOS, CHILE

P: 6AUG2019 117918 37.0S 73.0W 4.0-5.4 CCAAA Central Chile

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 13AUG2019 21:11:19 35.7N 23.6E ML=4.1 EMSC CRETE, GREECE

P: 9AUG2019 117769 36.0N 24.0E 3.0-4.3 BAAAA Aegean Sea

NEIC reported this earthquake of M 4.5 in Crete, Greece was felt with intensity II-III in the area(s) of Crete, Greece at Kolimvai, Ayia Marina, Galatas, Daratsos, Khania, Hania and Ayia Manna, Dodecanese Islands, Greece.

O: 13AUG2019 11:17:18 44.5N 9.8E ML=4.1 EMSC NORTHERN ITALY

P: 9AUG2019 117829 44.0N 11.0E 3.0-4.8 BAAAA Italy

O: 13AUG2019 19:36:36 66.7N 17.9W ML=3.0 EMSC ICELAND REGION

P: 15AUG2019 118109 66.0N 17.0W 3.0-4.3 AAAAA Iceland area

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 14AUG2019 01:57:23 16.1S 173.4W mb=4.2 EMSC TONGA

P: 15AUG2019 118124 16.0S 174.0W 4.0-5.3 AAAAA Tonga Islands

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 13AUG2019 10:23:39 4.5S 105.1W mb=4.3 EMSC CENTRAL EAST PACIFIC RISE

P: 7AUG2019 117725 4.0S 104.0W 4.0-5.4 CAAAA No. East Pacific Rise

O: 14AUG2019 03:02:26 54.7S 0.8W mb=5.2 EMSC BOUVET ISLAND REGION

P: 21AUG2019 118151 55.0S 2.0E 4.0-5.3 CABAA Atlantic-Indian Ridge

ZEALANDIA AND AUSTRALIA REGION

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 13AUG2019 22:02:53 39.0N 142.2E mb=4.5 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 15AUG2019 118056 41.0N 143.0E 3.5-5.3 ABAAA Hokkaido, Japan

P: 17AUG2019 118029 38.0N 141.0E 4.0-5.3 BAAAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 14AUG2019 05:37:59 35.6N 117.5W ML=2.2 EMSC SOUTHERN CALIFORNIA

O: 14AUG2019 05:00:51 35.7N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 14AUG2019 02:44:44 35.8N 117.6W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 14AUG2019 02:42:12 35.7N 117.5W Ml=2.3 EMSC SOUTHERN CALIFORNIA

O: 14AUG2019 01:31:40 36.2N 117.9W Ml=2.4 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 23:30:01 36.1N 117.9W Ml=2.8 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 22:53:38 36.1N 117.9W Ml=2.8 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 22:18:12 35.7N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 13AUG2019 21:08:44 35.8N 117.7W Ml=2.1 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 20:48:08 35.7N 117.4W Ml=2.3 EMSC SOUTHERN CALIFORNIA

O: 13AUG2019 19:46:04 35.8N 117.7W ML=2.1 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 19:21:19 35.5N 117.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 13AUG2019 17:25:37 35.6N 117.5W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 13AUG2019 15:59:59 35.9N 117.7W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 15:14:25 35.8N 117.7W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 13AUG2019 12:07:23 35.7N 117.5W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 13AUG2019 118005 36.0N 117.7W 2.5-4.5 AAAAA California/Nevada area

O: 13AUG2019 13:12:20 34.0N 116.8W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 11AUG2019 117807 34.1N 117.4W 2.5-4.4 AAAAA So. California

O: 13AUG2019 13:11:13 35.5N 118.4W Ml=2.4 EMSC CENTRAL CALIFORNIA

P: 16AUG2019 118038 35.6N 118.4W 2.5-4.5 BAAAA So. California

O: 13AUG2019 10:31:12 37.4N 121.7W Md=2.5 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 13AUG2019 118011 37.3N 121.6W 2.5-4.3 AAAAA Central California

NEIC reported this earthquake of M 2.5 in Northern California was felt with intensity II-III in the area(s) of San Jose, California.

O: 14AUG2019 03:28:36 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 15AUG2019 118013 38.8N 122.8W 2.5-4.3 AAAAA Central California

O: 13AUG2019 16:24:59 39.0N 123.0W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 14AUG2019 118013 39.8N 123.5W 2.5-4.3 AAAAA Central California

ALASKA

O: 13AUG2019 14:00:22 57.6N 154.7W ML=3.4 EMSC KODIAK ISLAND REGION, ALASKA

P: 13AUG2019 118080 54.7N 156.9W 3.5-4.8 ACBAA Alaska Peninsula

O: 14AUG2019 01:08:28 58.1N 137.7W Mw=4.5 EMSC SOUTHEASTERN ALASKA

O: 14AUG2019 01:08:35 58.4N 136.6W MB=4.9 ECAN OF JUNEAU, AK

P: 5AUG2019 117872 58.0N 136.0W 3.0-4.4 CAAAA Southeast Alaska

P: 15AUG2019 118086 58.3N 138.5W 3.0-4.9 AAAAA British Colombia

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

O: 13AUG2019 13:02:06 31.7N 104.3W ML=2.7 EMSC WESTERN TEXAS

P: 11AUG2019 117802 31.4N 103.8W 2.0-3.9 AAAAA SW U.S.A

O: 14AUG2019 01:28:40 44.4N 116.1W ML=2.6 EMSC SOUTHERN IDAHO

P: 8AUG2019 117835 44.4N 114.1W 2.0-3.9 CABAA Montana/Idaho

NEIC reported this earthquake of M 2.6 in Idaho was felt with intensity IV in the area(s) of Idaho at Cascade.

EASTERN U.S./CANADA

O: 13AUG2019 23:25:17 35.2N 95.3W mb=2.6 EMSC OKLAHOMA

P: 15AUG2019 118042 35.0N 96.0W 2.0-3.8 AAAAA Southeast U.S.

O: 14AUG2019 01:23:43 35.8N 98.1W ML=2.3 EMSC OKLAHOMA

O: 14AUG2019 05:14:22 36.1N 99.7W ML=2.7 EMSC OKLAHOMA

P: 16AUG2019 118043 37.0N 98.0W 2.0-4.1 AAAAA Southern Plains

O: 13AUG2019 19:40:19 36.7N 97.7W mb=3.2 EMSC OKLAHOMA

P: 13AUG2019 118043 36.0N 97.0W 2.0-4.1 AAAAA Southern Plains

NEIC reported this earthquake of M 3.0 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Claremore.

An M 3.4 was reported with intensity III in Pond Creek, Oklahoma.

O: 12AUG2019 17:17:32 72.2N 133.2W MB=4.0 ECAN Baillie, NT

P: 8AUG2019 117889 71.0N 134.0W 2.5-3.9 BBAAA Yukon Territory, Canada

O: 12AUG2019 10:56:00 45.0N 75.3W MB=1.4 ECAN Morrisburg, ON

P: 14AUG2019 118065 46.0N 75.0W 2.0-3.8 AAAAA New York State

O: 12AUG2019 04:52:30 82.6N 39.3W MB=4.0 ECAN Alert, NU

HAWAII

No earthquakes of M>=3 were located in Hawaii.

STRONG QUAKE SHAKES SOUTH ISLAND, NEW ZEALAND

EARTHQUAKE SUMMARY FOR AUGUST 12, 2019

The earth system was struck with stresses associated with end effects of a strong geomagnetic storm; an upcoming full moon which arrives at 12:29 UT on August 15; oceanic Storms; and distance effects from recent strong earthquakes. Together, these brought active seismicity pattern today. The geomagnetic effects were expected as:

"The geomagnetic field saw minor to major storm conditions today. The AP level was 24. High latitude geomagnetic field saw active conditions with AP at 12. This is the greatest disturbance in the geomagnetic field since AP reached 36 on May 14, 2019. The last storm of significantly larger AP occurred nearly a year ago on August 26, 2008 when AP reached 76 and high latitude AP was 90. Seismic increases are likely at high latitudes and within about 15 degrees of the geomagnetic equator beginning August 6 through August 11 due to triggering effects from this storm. The most likely timing of a strong to major event is August 10-12, the most likely regions - Indonesia, the Philippines the Southwest Pacific and Alaska." (August 6-7, 2019)

While seismicity possibly associated with the full moon was noted as:

The largest earthquake in the world today was an M 5.4 in the area of South Island, New Zealand. NEIC reported maximum intensity V in Te Anau, Southland, New Zealand and IV in Ohai and in Otago at Queenstown and Arrowtown. It was also felt with intensity II-III in Wanaa, Mount Cook, Canterbury, Invercargill, Outram, Waitati and Dunedin, South Island. GEONET reported 6878 people felt this quake with 2755 with weak intensity; 3119 with light intensity and 883 with moderate intensity. 109 reported strong intensity, 5 severe shaking and 7 with extreme intensity. It was followed by a strong aftershock sequence with many felt light earthquakes. This activity is located at 103 degrees from the M 7.1 in Southern/Central California of July 6 and, as noted in the previous issue of this summary, was probably

promoted from that source:

"The strongest earthquake of the day occurred in South Island, New Zealand where an M 4.7-5.2 in South Island, New Zealand was widely felt today. GEONET reported this earthquake was felt with moderate intensity in northern South Island. 2100 people reported feeling this event; 1135 with weak intensity; 884 with light shaking; 76 moderate; 4 strong; 1 with severe and 0 with extreme shaking. NEIC reported this earthquake at M 4.7 in South Island, New Zealand was felt with intensity II-III in the area(s) of Mapua, Tapawera, Tasman and Nelson, South Island, New Zealand and in Wellington, North Island. The last earthquake of M>=5.2 within about 150 km of today's epicenter occurred January 5, 2017 with M 5.4. It was probably a regional aftershock of the M 7.8 which hit the region on November 13, 2016. Forecast 117927 had expected today's event was likely around August 6-11. Southern New Zealand from Snares Island north became very active following the M 7.1 earthquake in Central California of July 6. This activation has included events up to M 6.7 and a number of moderate to moderately large quakes in the past month. The area lies near 103 degrees from the California epicenters and from the M 8.0 in Peru of May, 2019 and was probably promoted from those sources as previously proposed in this summary:

"California seismicity, especially around Southern California was enhanced today. Eight earthquakes outside the immediate Ridgecrest aftershock zone reach M>-3 magnitudes today in this area. One of the specialties of this summary, not generally available elsewhere is enhancement of seismicity at far-field distances. These generally include enhanced seismicity at nodal distances (51, 60, 72. 90, 103, 120, 144 and 180 degrees) from the epicenter of the major earthquake. ... Those at or near 103 degrees from Southern California include southern New Zealand, Greece and Turkey and Iran/Iraq, Central Asia and China, the Northern Philippines, New Britain and eastern Indonesia. These areas could see enhanced seismicity in the coming days and are marked on the accompanying map by stippled white lines." (July 6, 2019), (August 11-12, 2019)

The last earthquake in the Te Anau area of New Zealand's South Island with M>=6.1 occurred more than 10 years ago in July and August, 2009 when an M 7.8 on July 15, 2009 was followed by an M 6.1 on August 5, 2009 about 150 km southwest of today's epicenter. Forecast 117928 had expected today's event within about 100 km of this epicenter was likely around August 7.

O: 12JUN2019 10:35:27 44.5S 167.9E ML=6.1 GEONET reported 6878 people felt this quake

O: 12AUG2019 10:35:28 44.6S 167.9E mb=5.5 EMSC SOUTH ISLAND OF NEW ZEALAND

P: 7AUG2019 117928 45.0S 167.0E 3.0-4.9 BAAAA So. Island, N.Z.

An M 4.8 in Western Australia also occurred today. It is south of the M 6.6 which hit the area in late July and is not part of the classic aftershock series which is continuing at a lower magnitude level. An M 4.4 occurred about 50 km east of this on June 15, 2019, but there have been no earthquakes of M>=4.8 within about 200 km of this epicenter in the past 30 years. It may have been triggered by the M 6.1 in South Island, New Zealand earlier in the day. Forecast 117915 had expected a moderate earthquake in the area in early August.

O: 12AUG2019 19:11:47 21.4S 120.5E ML=4.8 EMSC WESTERN AUSTRALIA

P: 6AUG2019 117915 19.0S 120.0E 2.0-3.3 CCAAA Central Australia

Two moderate earthquakes of M 4.9 and 5.2 also occurred in the Kermadec Islands at the north end of the New Zealand/Kermadec arc. These had been expected within about 100 km to occur around August 7.

O: 13AUG2019 01:45:50 31.4S 177.4W mb=4.9 EMSC KERMADEC ISLANDS REGION

O: 13AUG2019 06:35:01 31.6S 177.5W mb=5.2 EMSC KERMADEC ISLANDS REGION

P: 7AUG2019 117924 31.0S 179.0W 4.0-5.4 AAAAA So. Kermadec Islands

An M 5.5 also occurred today off the coast of Chiapas, Mexico. NEIC reported this earthquake of M 5.5 in Chiapas, Mexico was felt with intensity IV in Tuxtla Gutierrez; IV in Paraiso, Tabasco Bochil, Chiapas, Mexico and II-III in the area(s) of Chiapas, Mexico at Chiapa, San Cristobal de las Casas, Salina Cruz, Oaxaca, Villahermosa Tabasco, San Benito Peten, Guatemala, Belmopan and Belize, Belize. This is the strongest quake in Chiapas within about 200 km of this epicenter since an M 5.8 on January 21, 2019 and prior to that an M 5.5 on April 11, 2018. Forecast 117740 had expected a moderate quake in the area was likely around August 8.

O: 12AUG2019 09:25:58 14.9N 94.2W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 12AUG2019 20:39:35 16.0N 93.6W Mw=5.5 EMSC CHIAPAS, MEXICO

P: 8AUG2019 117740 14.0N 92.0W 3.5-5.1 BBBAA Guatemala

Another area with continuing seismicity at 103 degrees from California was Crete, Greece where an M 4.5 was felt with intensity IV in Dafnes, Iraklion, Greece today.

O: 12AUG2019 23:38:56 35.2N 28.0E mb=4.0 EMSC DODECANESE ISLANDS, GREECE

P: 9AUG2019 117817 36.0N 28.0E 3.5-4.9 BAAAA Turkey

O: 12AUG2019 07:57:08 35.8N 25.7E ML=4.7 EMSC CRETE, GREECE

P: 9AUG2019 117769 36.0N 24.0E 3.0-4.3 BABAA Aegean Sea

The strongest earthquake in the U.S. or Alaska today was an M 4.5 in Hawaii. NEIC reported it was felt with intensity IV in Hawaii at Pepeekeo, Papaikou, Hakalau, Papaaloa and II-III in Honomu, Keaau, Ninole, Kurtistown, Mountain View and Laupahoehoe, Hawaii. This continues strong regional activation following the M 6.8 in Sumatra of August 2 which is at 103 degrees from today's epicenter as noted when a smaller event hit the area yesterday:

"Another earthquake of M>=3 occurred in Hawaii today and was widely felt. NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaiiat Laupahoehoe, Papaaloa, Paauilo, Ookala, Papaikou, Hilo, Honomu, Honolaa and Kamuela. Hawaii has become active in early August 2019 with earthquakes up to M 3.5. It is located at 103 degrees from Sumatra where an M 6.8 hit on August 2 and may be promoted by surface energy from that epicenter. Forecast 117741 had expected today's activity within about 50 km around August 11. Regional seismicity in Hawaii is likely to remain high for the next week with the possibility of a moderate quake in that time." (August 11-12, 2019)

This active period in Hawaii was also probably brought about by several Hurricanes which passed through the islands last week as noted in previous summaries:

"Hurricane Flossie continued northeast of Hawaii today with winds up to 40 kts. This system is currently showing no signs of seismic impact in this region as it is expected to move to the west over the next several days." (August 7-9, 2019)

The last activity in Hawaii with M>=4.5 occurred April 14, 2019 with M 5.3. The only comparable activity in the area since the end of the 2018 eruption in August, 2018 was an M 5.5 on March 13, 2019. Forecast 117741 had expected a moderate earthquake in Hawaii was likely around August 11.

O: 12AUG2019 14:41:56 19.8N 155.0W ML=4.5 EMSC ISLAND OF HAWAII, HAWAII

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

The M 4.5 in Hawaii was preceded by an earthquake of M 2.6 in the Oahu, Hawaii region. It occurred near local solar midnight and may have been promoted by tidal stresses which maximize at this hour. This is the strongest event within about 100 km of this epicenter since an M 3.3 on February 3, 2019. Forecast 117758 had expected regional activity in early August.

O: 12AUG2019 11:05:21 21.4N 157.3W Ml=2.6 EMSC OAHU REGION, HAWAII

P: 7AUG2019 117758 20.4N 155.1W 4.0-5.4 AAAAA Hawaii area

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 12AUG2019 13:36:58 25.6N 67.9E mb=4.5 EMSC PAKISTAN

P: 10AUG2019 117759 23.0N 70.0E 3.5-4.9 ACBAA India

NEIC reported this earthquake of M 4.5 in Pakistan was felt with intensity VII in Thano Bula Khan Sind, Pakistan and II-III in the area(s) of Pakistan at Hyderabad Sind, Pakistan.

O: 12AUG2019 22:32:00 28.4N 104.8E mb=4.7 EMSC EASTERN SICHUAN, CHINA

P: 9AUG2019 117764 27.0N 104.0E 4.0-5.3 BBAAA Myanmar

O: 12AUG2019 22:09:45 38.6N 90.6E mb=4.6 EMSC XINJIANG-QINGHAI BDR REG, CHIN

P: 10AUG2019 117821 35.0N 90.0E 3.8-5.1 ACAAA Xizang

O: 12AUG2019 17:14:46 40.9N 73.4E Mw=4.6 EMSC KYRGYZSTAN

P: 11AUG2019 117831 41.0N 73.0E 4.0-5.4 AAAAA Kirgizstan/Xinjiang

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 12AUG2019 22:33:21 0.5S 119.9E ML=4.0 EMSC MINAHASA, SULAWESI, INDONESIA

P: 5AUG2019 117733 1.0S 120.0E 4.0-5.3 CAAAA Sulawesi area

O: 12AUG2019 22:14:48 0.7S 128.0E ML=4.5 EMSC HALMAHERA, INDONESIA

P: 11AUG2019 117715 1.0N 126.0E 4.0-5.3 ABBAA Mindanao, Philippines

O: 12AUG2019 09:25:11 1.2S 117.8E ML=4.4 EMSC MAKASSAR STRAIT, INDONESIA

P: 6AUG2019 117733 2.0S 123.0E 4.0-5.3 CACAA Sulawesi area

O: 13AUG2019 00:12:58 1.4N 126.7E ML=4.0 EMSC MOLUCCA SEA

P: 11AUG2019 117715 1.0N 126.0E 4.0-5.3 AAAAA Mindanao, Philippines

O: 12AUG2019 13:57:52 5.1S 134.2E mb=4.8 EMSC KEPULAUAN ARU REGION, INDONESI

P: 9AUG2019 117728 3.0S 133.0E 4.0-5.3 BBAAA Papua New Guinea

O: 12AUG2019 10:38:12 5.8N 126.3E ML=4.8 EMSC MINDANAO, PHILIPPINES

P: 6AUG2019 117715 5.0N 124.0E 4.0-5.3 CABAA Mindanao, Philippines

O: 13AUG2019 00:08:43 6.1N 95.5E ML=4.7 EMSC NICOBAR ISLANDS, INDIA REGION

P: 6AUG2019 117716 5.0N 97.0E 4.0-5.3 CBBAA Nicobar Islands

O: 13AUG2019 03:30:30 6.1N 126.1E mb=4.6 EMSC MINDANAO, PHILIPPINES

P: 9AUG2019 117711 8.0N 125.0E 4.0-5.3 BBAAA Central Philippines

O: 12AUG2019 08:31:24 9.7S 114.0E mb=4.9 EMSC SOUTH OF BALI, INDONESIA

O: 12AUG2019 07:43:17 9.8S 114.0E ML=4.5 EMSC SOUTH OF JAVA, INDONESIA

P: 6AUG2019 117729 9.0S 114.0E 4.0-5.3 CAAAA So. of Bali

O: 13AUG2019 03:18:57 11.4S 105.3E ML=4.9 EMSC SOUTH OF JAVA, INDONESIA

P: 4AUG2019 117900 10.0S 107.0E 4.0-5.3 CBBAA So. of Java

CENTRAL AND SOUTH AMERICA

O: 12AUG2019 21:40 19.2S 69.7W mb=4.5 GUC Tarapaca at La Tirana and Pozo

O: 12AUG2019 08:17 20.7S 69.2W mb=4.7 GUC Tarapaca at La Tirana and Pozo

P: 4AUG2019 117912 20.0S 70.0W 4.0-5.3 CAAAA So. Peru/Bolivia

P: 11AUG2019 117899 18.0S 71.0W 4.0-5.3 ACBAA So. Peru/Bolivia

CSN reported this earthquake of M 4.5 was felt with intensity II-III in Tarapaca at La Tirana and Pozo Almonte, Pica, Camina, Alto Hospicio, Iquique, Mamina, Chile

CSN reported the earthquake of M 4.7 was felt with intensity V in Tarapaca at La Tirana and Pozo Almonte; IV in Pica, Camina and III in Alto Hospicio, Iquique, Mamina and Pisagua; II in Tocopilla, Antofagasta and III in Arica at Codpa and Cuya, Chile.

O: 12AUG2019 12:25:50 10.5N 86.2W mb=4.5 EMSC OFF COAST OF COSTA RICA

P: 7AUG2019 117746 13.0N 88.0W 3.5-5.0 BCBAA Nicaragua

NEIC reported this earthquake of M 4.5 in Costa Rica was felt with intensity II-III in the area(s) of Costa Rica at Sardinal and Nicoya, Guanacaste.

O: 12AUG2019 09:25:58 14.9N 94.2W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 12AUG2019 20:39:35 16.0N 93.6W Mw=5.5 EMSC CHIAPAS, MEXICO

P: 8AUG2019 117740 14.0N 92.0W 3.5-5.1 BBBAA Guatemala

O: 12AUG2019 20:50:48 16.7N 94.7W ML=4.1 EMSC OAXACA, MEXICO

O: 12AUG2019 19:53:27 17.0N 94.6W ML=4.1 EMSC OAXACA, MEXICO

O: 13AUG2019 04:25:40 17.0N 96.5W ML=4.1 EMSC OAXACA, MEXICO

O: 12AUG2019 20:59:02 17.5N 94.8W ML=4.2 EMSC VERACRUZ, MEXICO

P: 11AUG2019 117748 16.0N 98.0W 3.5-5.2 ABCAA Oaxaca, Mexico

O: 13AUG2019 01:36:40 18.1N 70.7W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

O: 12AUG2019 14:15:56 18.4N 68.7W Md=3.2 EMSC DOMINICAN REPUBLIC

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 AAAAA Puerto Rico

O: 12AUG2019 16:36:12 18.4N 93.1W ML=4.1 EMSC OFFSHORE TABASCO, MEXICO

P: 2AUG2019 117740 15.0N 91.0W 3.5-5.1 CCBAA Guatemala

O: 12AUG2019 18:54:31 18.5N 70.4W ML=3.0 EMSC DOMINICAN REPUBLIC

O: 12AUG2019 23:20:40 18.8N 69.1W ML=3.3 EMSC DOMINICAN REPUBLIC

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 BAAAA Puerto Rico

O: 12AUG2019 13:13:26 19.1N 67.7W ML=3.2 EMSC PUERTO RICO REGION

O: 12AUG2019 08:38:06 19.3N 68.3W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

P: 8AUG2019 117751 19.0N 67.0W 3.4-4.8 BAAAA Puerto Rico

O: 12AUG2019 21:40:19 19.3S 69.7W Mw=4.5 EMSC TARAPACA, CHILE

P: 11AUG2019 117899 18.0S 71.0W 4.0-5.3 ABAAA So. Peru/Bolivia

O: 12AUG2019 08:17:48 20.9S 69.2W mb=4.7 EMSC TARAPACA, CHILE

P: 4AUG2019 117912 20.0S 70.0W 4.0-5.3 CAAAA So. Peru/Bolivia

NEIC reported this earthquake of M 4.7 in Northern Chile was felt with intensity II-III in the area(s) of Chile at Iquique, Tarapaca, Chile.

O: 13AUG2019 04:53:50 22.2S 68.7W ML=4.3 EMSC ANTOFAGASTA, CHILE

P: 11AUG2019 117907 24.0S 69.0W 4.0-5.3 ABAAA Coast No. Chile

AFRICA AND EUROPE

O: 12AUG2019 23:38:56 35.2N 28.0E mb=4.0 EMSC DODECANESE ISLANDS, GREECE

P: 9AUG2019 117817 36.0N 28.0E 3.5-4.9 BAAAA Turkey

O: 12AUG2019 07:57:08 35.8N 25.7E ML=4.7 EMSC CRETE, GREECE

P: 9AUG2019 117769 36.0N 24.0E 3.0-4.3 BABAA Aegean Sea

O: 12AUG2019 13:34:28 38.3N 40.9E ML=4.1 EMSC EASTERN TURKEY

P: 9AUG2019 117825 40.0N 41.0E 3.5-4.8 BBAAA Caucasus/Caspian Sea

O: 12AUG2019 15:37:08 41.9N 20.2E mb=4.2 EMSC ALBANIA

P: 6AUG2019 117847 41.0N 20.0E 3.0-5.0 CAAAA Romania/NW Turkey

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 13AUG2019 03:58:54 13.1S 167.1E mb=4.6 EMSC VANUATU

P: 10AUG2019 117903 14.0S 167.0E 4.0-5.3 BAAAA Vanuatu Islands

O: 12AUG2019 17:20:22 23.7S 179.4W mb=4.8 EMSC SOUTH OF FIJI ISLANDS

P: 10AUG2019 117913 22.0S 180.0W 4.0-5.3 ABAAA Tonga Islands

OCEAN RIDGES

O: 12AUG2019 22:40:58 29.2S 97.0E Mw=4.9 EMSC SOUTH INDIAN OCEAN

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

O: 12AUG2019 19:11:47 21.4S 120.5E ML=4.8 EMSC WESTERN AUSTRALIA

P: 6AUG2019 117915 19.0S 120.0E 2.0-3.3 CCAAA Central Australia

O: 13AUG2019 01:45:50 31.4S 177.4W mb=4.9 EMSC KERMADEC ISLANDS REGION

O: 13AUG2019 06:35:01 31.6S 177.5W mb=5.2 EMSC KERMADEC ISLANDS REGION

P: 7AUG2019 117924 31.0S 179.0W 4.0-5.4 AAAAA So. Kermadec Islands

O: 12AUG2019 10:35:28 44.6S 167.9E mb=5.5 EMSC SOUTH ISLAND OF NEW ZEALAND

P: 7AUG2019 117928 45.0S 167.0E 3.0-4.9 BAAAA So. Island, N.Z.

JAPAN AND KURIL ISLANDS

No earthquakes of M>=4 were located in Japan or the Kuril Islands today.

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 13AUG2019 05:25:49 35.7N 117.6W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 13AUG2019 05:16:06 35.7N 117.5W Ml=2.4 EMSC SOUTHERN CALIFORNIA

O: 13AUG2019 00:26:41 36.0N 117.4W Ml=2.1 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 23:41:27 35.9N 117.7W Ml=2.8 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 23:30:53 35.7N 117.5W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 23:12:05 35.7N 117.6W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 22:10:37 36.0N 117.7W ML=2.0 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 21:34:47 35.9N 117.8W ML=2.1 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 19:45:39 35.6N 117.4W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 19:36:14 35.7N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 19:22:17 35.8N 117.7W Ml=2.4 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 19:20:25 36.1N 117.9W Ml=2.7 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 17:42:41 35.7N 117.6W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 17:06:51 35.7N 117.5W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 15:47:09 35.9N 117.7W Ml=2.0 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 15:06:18 35.7N 117.6W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 12AUG2019 15:01:30 35.9N 117.7W ML=2.0 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 12:56:01 36.2N 117.9W Ml=2.0 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 08:41:03 35.9N 117.7W Ml=2.0 EMSC CENTRAL CALIFORNIA

P: 11AUG2019 117771 36.1N 118.1W 2.5-4.5 AAAAA California/Nevada area

P: 11AUG2019 117808 35.7N 118.1W 2.5-4.5 AAAAA So. California

O: 13AUG2019 04:27:33 34.0N 117.3W Ml=2.5 EMSC GREATER LOS ANGELES AREA, CALI

P: 11AUG2019 117807 34.1N 117.4W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 2.5 in Southern California was felt with intensity IV in Riverside, California and II-III in the area(s) of Southern California at Fontana, Norco, and Chino Hills.

O: 13AUG2019 03:06:41 37.2N 118.3W Md=2.3 EMSC CENTRAL CALIFORNIA

O: 12AUG2019 23:55:00 37.6N 118.8W Md=2.3 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117773 37.4N 118.6W 2.5-4.3 AAAAA California/Nevada area

ALASKA

O: 13AUG2019 03:22:27 58.9N 138.1W ml=3.5 EMSC SOUTHEASTERN ALASKA

P: 9AUG2019 117875 60.0N 139.0W 3.2-4.8 BBAAA Central Alaska

O: 13AUG2019 00:11:11 61.5N 149.9W ML=3.2 EMSC SOUTHERN ALASKA

P: 11AUG2019 117877 61.3N 150.9W 3.2-4.8 AAAAA Central Alaska

NEIC reported this earthquake of M 3.2 in the Anchorage, Alaska aftershock zone was felt with intensity II-III in the area(s) of Wasilla, Willow, Anchorage, Chugiak in the Anchorage, Alaska aftershock zone.

O: 12AUG2019 08:19:28 62.8N 157.0W ml=3.2 EMSC CENTRAL ALASKA

P: 7AUG2019 117883 65.0N 155.0W 3.0-4.5 BCAAA Northern Alaska

O: 12AUG2019 09:32:33 66.7N 146.7W ml=3.2 EMSC NORTHERN ALASKA

P: 7AUG2019 117883 69.0N 144.0W 3.0-4.5 BBAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

O: 12AUG2019 19:57:33 37.8N 113.2W Ml=2.4 EMSC UTAH

O: 12AUG2019 19:04:50 38.0N 112.4W Ml=2.5 EMSC UTAH

P: 7AUG2019 117774 38.7N 114.5W 2.5-4.3 AAAAA California/Nevada area

EASTERN U.S./CANADA

O: 12AUG2019 09:43:33 35.8N 98.1W ML=2.2 EMSC OKLAHOMA

P: 9AUG2019 117813 36.0N 97.0W 2.0-3.8 BAAAA Southern Plains

HAWAII

O: 12AUG2019 14:41:56 19.8N 155.0W ML=4.5 EMSC ISLAND OF HAWAII, HAWAII

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

O: 12AUG2019 11:05:21 21.4N 157.3W Ml=2.6 EMSC OAHU REGION, HAWAII

P: 7AUG2019 117758 20.4N 155.1W 4.0-5.4 AAAAA Hawaii area

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

MODERATE QUAKE IN SOUTH ISLAND, NEW ZEALAND; PROBABLY PROMOTED FROM CALIFORNIA

EARTHQUAKE SUMMARY FOR AUGUST 11, 2019

The strongest earthquake of the day occurred in South Island, New Zealand wher an M 4.7-5.2 in South Island, New Zealand was widely felt today. GEONET reported this earthquake was felt with moderate intensity in northern South Island. 2100 people reported feeling this event; 1135 with weak intensity; 884 with light shaking; 76 moderate; 4 strong; 1 with severe and 0 with extreme shaking. NEIC reported this earthquake at M 4.7 in South Island, New Zealand was felt with intensity II-III in the area(s) of Mapua, Tapawera, Tasman and Nelson, South Island, New Zealand and in Wellington, North Island.

The last earthquake of M>=5.2 within about 150 km of today's epicenter occurred January 5, 2017 with M 5.4. It was probably a regional aftershock of the M 7.8 which hit the region on November 13, 2016. Forecast 117927 had expected today's event was likely around August 6-11. Southern New Zealand from Snares Island north became very active following the M 7.1 earthquake in Central California of July 6. This activation has included events up to M 6.7 and a number of moderate to moderately large quakes in the past month. The area lies near 103 degrees from the California epicenters and from the M 8.0 in Peru of May, 2019 and was probably promoted from those sources as previously proposed in this summary:

O: 11AUG2019 20:44:34 41.2S 172.8E mb=4.7 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 11AUG2019 20:44:36 41.2S 172.9E ML=5.2 GEONET Felt with moderate intensity

P: 6AUG2019 117927 42.0S 172.0E 3.0-4.8 BAAAA So. Island, N.Z.

P: 11AUG2019 117927 43.0S 171.0E 3.0-4.8 ABBAA So. Island, N.Z.

An unusual earthquake of M 4.1 occurred today in Hungary. Only four earthquakes of M>=4.1 have occurred in Hungary within about 150 km of today's epicenter in the past 30 years. The last of these was an M 4.1 on Jun 5, 2013; the largest were of M 4.4 and 4.3 on April 22, 2013 and January 29, 2011. Forecast 117822 had expected today's event was likely in this area around August 11.

O: 11AUG2019 23:29:46 47.6N 20.3E ML=4.1 EMSC HUNGARY

P: 11AUG2019 117822 48.0N 18.0E 3.0-4.9 AABAA Adriatic Sea

The strongest seismicity in the U.S. or Canada today occurred in the Fox and the Andreanof Islands with two events of M 3.6. Earthquakes at the magnitude level are common in this region and in the past month include and M 3.8 and 4.0 on August 5 and an M 3.7 on July 31, 2019. Forecast 117859 had expected today's activity within about 100 km was likely in early August.

O: 11AUG2019 10:29:06 51.9N 173.1W mb=3.6 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 4AUG2019 117859 52.3N 174.6W 3.5-4.8 CAAAA Andreanoff Isls, Aleutians

O: 11AUG2019 08:19:59 52.0N 170.9W mb=3.6 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 6AUG2019 117859 52.4N 170.7W 3.5-4.9 BAAAA Andreanoff Isls, Aleutians

Another earthquake of M>=3 occurred in Hawaii today and was widely felt. NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaiiat Laupahoehoe, Papaaloa, Paauilo, Ookala, Papaikou, Hilo, Honomu, Honolaa and Kamuela. Hawaii has become active in early August 2019 with earthquakes up to M 3.5. It is located at 103 degrees from Sumatra where an M 6.8 hit on August 2 and may be promoted by surface energy from that epicenter. Forecast 117741 had expected today's activity within about 50 km around August 11. Regional seismicity in Hawaii is likely to remain high for the next week with the possibility of a moderate quake in that time.

O: 11AUG2019 20:02:58 19.9N 155.4W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 11AUG2019 11:07:59 30.4N 94.9E mb=4.6 EMSC EASTERN XIZANG

O: 12AUG2019 03:32:30 30.4N 94.9E mb=4.8 EMSC EASTERN XIZANG

O: 12AUG2019 03:06:22 30.5N 94.8E mb=4.3 EMSC EASTERN XIZANG

P: 8AUG2019 117821 36.0N 94.0E 3.8-5.1 BCAAA Xizang

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 11AUG2019 17:52:10 2.8N 129.4E ML=4.4 EMSC HALMAHERA, INDONESIA

P: 11AUG2019 117715 1.0N 126.0E 4.0-5.3 ABCAA Mindanao, Philippines

O: 11AUG2019 17:51:14 5.9N 133.2E Mw=5.0 EMSC PALAU REGION

P: 2AUG2019 117714 3.0N 127.0E 4.0-5.3 CCCAA Halmahera

NEIC reported this earthquake of M 5.0 in Palau was felt with intensity II-III in the area(s) of Ngaramash Angaur and Meyungs Koror, Palau.

O: 11AUG2019 07:57:28 6.5S 130.2E ML=4.6 EMSC BANDA SEA

P: 11AUG2019 117718 6.0S 129.0E 4.0-5.3 AAAAA Banda Sea

O: 11AUG2019 22:08:16 9.0S 114.5E ML=4.9 EMSC BALI REGION, INDONESIA

O: 11AUG2019 22:51:35 9.6S 114.0E Mw=4.8 EMSC SOUTH OF JAVA, INDONESIA

O: 11AUG2019 22:55:37 9.7S 114.0E ML=4.5 EMSC SOUTH OF JAVA, INDONESIA

P: 6AUG2019 117729 9.0S 114.0E 4.0-5.3 BAAAA So. of Bali

NEIC reported this earthquake of M 4.8 South of Java, Indonesia was felt with intensity IV in Gambiran, Java and Sinjai, Sulawesi, Indonesia and II-III in the area(s) of Bali at Kuta, Denpasar and Ubud.

CENTRAL AND SOUTH AMERICA

O: 11AUG2019 11:00:10 6.8N 73.0W mb=4.5 EMSC NORTHERN COLOMBIA

P: 4AUG2019 117712 7.0N 73.0W 4.0-5.3 CAAAA Colombia

O: 11AUG2019 17:09:30 10.3N 86.3W ML=4.3 EMSC OFF COAST OF COSTA RICA

P: 7AUG2019 117746 13.0N 88.0W 3.5-5.0 BCBAA Nicaragua

O: 12AUG2019 03:23:36 13.2N 89.7W ML=4.3 EMSC OFFSHORE EL SALVADOR

P: 11AUG2019 117740 13.0N 90.0W 3.5-5.0 AAAAA Guatemala

O: 11AUG2019 13:47:44 15.8N 95.0W ML=4.3 EMSC OFFSHORE OAXACA, MEXICO

P: 7AUG2019 117748 17.0N 98.0W 3.5-5.1 ABCAA Oaxaca, Mexico

O: 12AUG2019 05:05:31 17.3N 100.4W ML=4.1 EMSC GUERRERO, MEXICO

P: 6AUG2019 117749 17.0N 100.0W 3.5-5.1 CAAAA Oaxaca, Mexico

O: 11AUG2019 19:51:33 17.9N 71.6W ML=3.1 EMSC DOMINICAN REPUBLIC

O: 11AUG2019 22:10:15 18.0N 71.6W ML=3.0 EMSC DOMINICAN REPUBLIC

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 CAAAA Puerto Rico

O: 11AUG2019 12:51:22 19.2N 67.9W Md=3.1 EMSC DOMINICAN REPUBLIC REGION

P: 8AUG2019 117751 19.0N 67.0W 3.4-4.8 BAAAA Puerto Rico

O: 12AUG2019 01:47:02 20.1S 64.6W mb=4.6 EMSC CHUQUISACA, BOLIVIA

P: 11AUG2019 117899 18.0S 71.0W 4.0-5.3 ACCAA So. Peru/Bolivia

O: 11AUG2019 07:41:25 25.0S 70.9W Mw=4.0 EMSC OFFSHORE ANTOFAGASTA, CHILE

P: 11AUG2019 117907 24.0S 69.0W 4.0-5.3 AABAA Coast No. Chile

O: 11AUG2019 18:44:07 28.1S 63.2W mb=4.9 EMSC SANTIAGO DEL ESTERO, ARGENTINA

P: 8AUG2019 117906 28.0S 68.0W 4.0-5.3 BACAA Argentina

O: 12AUG2019 02:30:19 32.2S 65.3W ML=4.0 EMSC SAN LUIS, ARGENTINA

P: 2AUG2019 117917 33.0S 69.0W 4.0-5.4 DACAA Central Chile

NEIC reported this earthquake of M 4.0 in San Luis, Argentina was felt with intensity II-III in the area(s) of San Luis, Argentina at Alta Gracia. Cordoba.

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 11AUG2019 12:35:08 35.1N 28.0E mb=4.2 EMSC EASTERN MEDITERRANEAN SEA

P: 9AUG2019 117817 36.0N 28.0E 3.5-4.9 AAAAA Turkey

O: 11AUG2019 23:29:46 47.6N 20.3E ML=4.1 EMSC HUNGARY

P: 11AUG2019 117822 48.0N 18.0E 3.0-4.9 AABAA Adriatic Sea

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 11AUG2019 07:20:58 18.0S 178.4W mb=4.5 EMSC FIJI REGION

P: 6AUG2019 117901 18.0S 180.0W 4.0-5.3 BAAAA Tonga Islands

O: 11AUG2019 16:38:59 23.9S 179.9W mb=4.5 EMSC SOUTH OF FIJI ISLANDS

P: 10AUG2019 117913 22.0S 180.0W 4.0-5.3 ABAAA Tonga Islands

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 11AUG2019 17:34:57 37.1N 20.9W mb=4.7 EMSC AZORES ISLANDS REGION

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

O: 11AUG2019 20:44:34 41.2S 172.8E mb=4.7 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 11AUG2019 20:44:36 41.2S 172.9E ML=5.2 GEONET Felt with moderate intensity

P: 6AUG2019 117927 42.0S 172.0E 3.0-4.8 BAAAA So. Island, N.Z.

P: 11AUG2019 117927 43.0S 171.0E 3.0-4.8 ABBAA So. Island, N.Z.

GEONET reported this earthquake was felt with moderate intensity in northern South Island. 2100 people reported feeling this event; 1135 with weak intensity; 884 with light shaking; 76 moderate; 4 strong; 1 with severe and 0 with extreme shaking.

JAPAN AND KURIL ISLANDS

O: 11AUG2019 09:07:42 48.0N 155.1E mb=4.4 EMSC KURIL ISLANDS

P: 9AUG2019 117851 49.0N 153.0E 3.5-5.3 AABAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 11AUG2019 18:35:59 32.2N 115.3W Ml=2.5 EMSC BAJA CALIFORNIA, MEXICO

P: 11AUG2019 117803 32.4N 115.8W 2.5-4.4 AAAAA So. California

O: 11AUG2019 18:01:38 35.7N 117.5W ML=3.2 EMSC SOUTHERN CALIFORNIA

O: 11AUG2019 14:43:37 35.9N 117.7W Ml=2.6 EMSC CENTRAL CALIFORNIA

P: 11AUG2019 117808 35.7N 118.1W 2.5-4.5 AAAAA So. California

O: 11AUG2019 21:22:09 36.1N 120.2W Md=2.1 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117776 36.1N 120.1W 2.5-4.3 AAAAA Central California

O: 12AUG2019 03:46:41 36.2N 114.9W ml=2.0 EMSC NEVADA

P: 7AUG2019 117774 38.7N 114.5W 2.5-4.3 BBAAA California/Nevada area

O: 11AUG2019 12:57:13 36.5N 120.4W Md=2.9 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117776 36.1N 120.1W 2.5-4.3 AAAAA Central California

O: 11AUG2019 10:39:21 36.5N 121.0W Md=2.3 EMSC CENTRAL CALIFORNIA

O: 11AUG2019 08:24:09 36.6N 121.2W Md=2.8 EMSC CENTRAL CALIFORNIA

O: 11AUG2019 13:46:30 36.6N 121.2W Md=3.0 EMSC CENTRAL CALIFORNIA

P: 9AUG2019 117799 35.7N 121.2W 2.5-4.3 AAAAA Off So. California

NEIC reported these earthquake of M 3.0 and 2.8 in Central California were felt with intensity II-III in the area(s) of Salinas, California.

O: 11AUG2019 08:20:54 37.6N 118.8W MD=2.3 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117773 37.4N 118.6W 2.5-4.3 AAAAA California/Nevada area

O: 12AUG2019 00:42:04 39.0N 122.6W Md=2.4 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117779 38.8N 122.8W 2.5-4.3 BAAAA Central California

O: 11AUG2019 06:32:07 39.7N 122.6W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 11AUG2019 05:55:48 40.1N 122.3W Md=2.5 EMSC NORTHERN CALIFORNIA

O: 11AUG2019 11:30:21 40.7N 121.5W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117840 40.6N 122.4W 2.5-4.3 BAAAA Northern California

ALASKA

O: 11AUG2019 10:29:06 51.9N 173.1W mb=3.6 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 4AUG2019 117859 52.3N 174.6W 3.5-4.8 CAAAA Andreanoff Isls, Aleutians

O: 11AUG2019 08:19:59 52.0N 170.9W mb=3.6 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 6AUG2019 117859 52.4N 170.7W 3.5-4.9 BAAAA Andreanoff Isls, Aleutians

O: 12AUG2019 05:37:40 58.2N 137.5W ML=2.9 EMSC SOUTHEASTERN ALASKA

P: 9AUG2019 117861 58.3N 133.5W 3.0-4.8 BABAA British Colombia

P: 9AUG2019 117875 60.0N 139.0W 3.2-4.8 BBAAA Central Alaska

O: 11AUG2019 11:09:09 69.2N 144.7W ML=3.5 EMSC NORTHERN ALASKA

O: 12AUG2019 06:45:07 69.2N 146.7W ml=3.4 EMSC NORTHERN ALASKA

P: 7AUG2019 117883 69.0N 144.0W 3.0-4.5 AAAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 11AUG2019 16:52:21 47.6N 121.8W Md=2.2 EMSC WASHINGTON

P: 11AUG2019 117854 49.0N 123.0W 2.0-3.8 ABAAA Washington state, U.S.

O: 11AUG2019 16:44:29 49.3N 119.7W ML=2.6 EMSC BRITISH COLUMBIA, CANADA

NEIC reported this earthquake of M 2.6 in British Columbia, Canada was felt with intensity II-III in the area(s) of British Columbia, Canada Oliver, Penticton, Summerland, and in Oroville, Washington.

ROCKY MOUNTAINS REGION

O: 11AUG2019 21:55:55 31.7N 104.4W ML=2.8 EMSC WESTERN TEXAS

P: 11AUG2019 117802 31.4N 103.8W 2.0-3.9 AAAAA SW U.S.A

O: 11AUG2019 08:34:14 45.9N 111.4W Ml=2.0 EMSC WESTERN MONTANA

P: 11AUG2019 117835 45.7N 112.1W 2.0-3.9 AAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 11AUG2019 15:14:40 35.0N 85.5W Md=2.4 EMSC TENNESSEE

P: 11AUG2019 117811 33.0N 82.0W 2.0-3.9 ABBAA Southeast U.S.

O: 12AUG2019 01:26:45 35.1N 95.3W mb=3.2 EMSC OKLAHOMA

O: 11AUG2019 15:30:38 36.3N 97.5W mb=2.5 EMSC OKLAHOMA

P: 9AUG2019 117813 36.0N 97.0W 2.0-3.8 AAAAA Southern Plains

NEIC reported this earthquake of M 3.6 in Oklahoma was felt with intensity IV in the area(s) of Oklahoma at Kinta and Quinton.

O: 12AUG2019 04:01:44 37.0N 99.4W mb=2.8 EMSC OKLAHOMA

O: 11AUG2019 07:26:20 38.9N 99.2W mb=3.0 EMSC KANSAS

P: 8AUG2019 117814 39.0N 99.0W 2.0-3.9 BAAAA Southern Plains

NEIC reported this earthquake of M 3.0 in Kansas was felt with intensity IV in the area(s) of Hays, Kansas.

HAWAII

No earthquakes of M>=3 were located in Hawaii.

ANATOLIAN ZONE CONTINUES ACTIVE

EARTHQUAKE SUMMARY FOR AUGUST 10, 2019

Seismic activation of the Anatolian Fault Zone in Greece, Turkey and Azerbaijan continued today with an M 5.0 in Crete, Greece and a series in Azerbaijan of M 4.9, 4.4 and 4.1 among others of lesser magnitude. An M 5.0 hit within about 150 km of the event in Crete on July 31, 2019 but the last in this area of greater magnitude was an M 5.3 on July 31, 2017. Forecast 117784 had expected today's area would be active around August 6. This epicenter in Crete and that in Azerbaijan is at 102 degrees from the M 7.1 in Southern California of July 6 and was probably promoted by energy from that source.

O: 11AUG2019 07:02:50 34.3N 25.0E mb=5.0 EMSC CRETE, GREECE

P: 6AUG2019 117784 34.0N 27.0E 3.0-4.3 BABAA Crete

The activity in Azerbaijan included events of M 4.9, 4.4 and 4.1 and was the strongest within about 150 km of those epicenters since an M 5.1 on February 5, 2019 and prior to that an M 5.3 on June 5, 2018. Forecast 117830 had expected activity southeast of this around August 11.

NEIC reported this earthquake of M 4.9 in Azerbaijan was felt with intensity II-III in the area(s) of Azerbaijan at Zaqatala and in Georgia at Tblisi and Zahesi Mtskheta-Mtianeti. This epicenter in Azebaijan is at 101-102 degrees from the M 7.1 in Southern California of July 6 and was probably promoted by energy from that source.

O: 10AUG2019 11:22:48 41.6N 46.6E mb=4.1 EMSC AZERBAIJAN

O: 11AUG2019 03:29:20 41.6N 46.6E mb=4.4 EMSC AZERBAIJAN

O: 10AUG2019 07:35:10 41.8N 46.8E mb=4.9 EMSC AZERBAIJAN

P: 11AUG2019 117830 40.0N 50.0E 4.0-5.4 ABCAA Kazakhstan

The strongest activity of the day occurred in the region of Indonesia and Sumatra. The largest of these was an M 5.4 in the Banda Sea; but earthquakes of M 5.3 and 5.3 also hit southwest of Sumatra, Indonesia and with M 5.2 in Southern Sumatra, Indonesia. Enhanced seismicity in this region had been expected at this time in this summary as:

NEIC reported this earthquake of M 5.2 in Southern Sumatra was felt with intensity II-III in the area(s) of Southern Sumatra at Padang Pariaman and Padang, Sumatra, Indonesia.

O: 10AUG2019 21:11:09 0.8S 99.4E Mw=5.2 EMSC SOUTHERN SUMATRA, INDONESIA

P: 10AUG2019 117717 0.0N 99.0E 4.0-5.3 AAAAA So. Sumatera

O: 11AUG2019 02:11:08 7.2S 102.9E mb=5.3 EMSC SOUTHWEST OF SUMATRA, INDONESI

O: 11AUG2019 04:39:02 7.2S 103.0E mb=5.3 EMSC SOUTHWEST OF SUMATRA, INDONESI

P: 8AUG2019 117731 6.0S 102.0E 4.0-5.5 BBAAA So. of Sumatera

O: 10AUG2019 12:01:34 5.6S 129.7E Mw=5.4 EMSC BANDA SEA

P: 11AUG2019 117718 6.0S 129.0E 4.0-5.3 AAAAA Banda Sea

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Fox Islands, Aleutians, Alaska. It was not reported felt in this remote area. The last earthquake within about 150 km of this epicenter with M>=4.9 occurred as an < 5.4 on July 9, 2019 and prior to that an M 4.9 on March 4, 2018. Forecast 117863 had expected activity in this area was likely around August 9.

O: 10AUG2019 21:38:54 52.3N 168.3W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 9AUG2019 117863 51.7N 166.4W 3.5-4.8 AAAAA Fox Islands, Aleutians

Earthquakes of M 4.5 and 3.7 occurred in the northern Gulf of California and Baja California today. This is an area which is often associated with strong geomagnetic storms and the storm of August 5 may have helped bring these events up to date. The M 4.5 is the strongest within about 100 km of this epicenter since an M 5.2 on April 6, 2019 and prior to that an M 4.5 on July 28, 2018. A swarm including an M 5.5 hit the region in March 28, 2016. Forecast 117801 had expected today's activity in this region was likely around August 11.

O: 10AUG2019 18:53:06 30.8N 115.3W ML=3.7 EMSC BAJA CALIFORNIA, MEXICO

O: 10AUG2019 08:28:46 31.2N 114.2W ML=4.5 EMSC GULF OF CALIFORNIA

P: 11AUG2019 117801 30.2N 114.1W 2.0-3.8 AAAAA SW U.S.A

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 11AUG2019 02:13:26 30.4N 94.8E mb=5.1 EMSC EASTERN XIZANG

P: 8AUG2019 117821 36.0N 94.0E 3.8-5.1 BCAAA Xizang

O: 10AUG2019 16:59:16 30.7N 57.4E ML=4.0 EMSC EASTERN IRAN

P: 9AUG2019 117810 31.0N 57.0E 3.8-5.1 AAAAA So. Iran

O: 10AUG2019 23:17:17 52.1N 160.1E mb=4.9 EMSC OFF EAST COAST OF KAMCHATKA

P: 4AUG2019 117864 52.0N 158.0E 4.0-5.7 CABAA Kamchatka

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 10AUG2019 12:59:14 0.3N 120.1E mb=4.6 EMSC MINAHASA, SULAWESI, INDONESIA

P: 5AUG2019 117733 1.0S 120.0E 4.0-5.3 BBAAA Sulawesi area

O: 10AUG2019 21:11:09 0.8S 99.4E Mw=5.2 EMSC SOUTHERN SUMATRA, INDONESIA

P: 10AUG2019 117717 0.0N 99.0E 4.0-5.3 AAAAA So. Sumatera

O: 10AUG2019 14:43:07 0.8S 127.6E ML=4.1 EMSC HALMAHERA, INDONESIA

P: 9AUG2019 117722 3.0S 126.0E 4.0-5.3 ACBAA Ceram area

O: 10AUG2019 22:37:43 4.6S 145.4E mb=4.6 EMSC NEAR N COAST OF NEW GUINEA, PN

P: 7AUG2019 117728 4.0S 143.0E 4.0-5.3 BABAA Papua New Guinea

O: 10AUG2019 12:01:34 5.6S 129.7E Mw=5.4 EMSC BANDA SEA

P: 11AUG2019 117718 6.0S 129.0E 4.0-5.3 AAAAA Banda Sea

O: 10AUG2019 21:58:52 6.0S 146.7E mb=5.0 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 7AUG2019 117724 7.0S 147.0E 4.0-5.3 BAAAA New Ireland

O: 10AUG2019 12:26:02 6.5S 130.1E mb=4.5 EMSC BANDA SEA

P: 11AUG2019 117718 6.0S 129.0E 4.0-5.3 AAAAA Banda Sea

O: 11AUG2019 02:11:08 7.2S 102.9E mb=5.3 EMSC SOUTHWEST OF SUMATRA, INDONESI

O: 11AUG2019 04:39:02 7.2S 103.0E mb=5.3 EMSC SOUTHWEST OF SUMATRA, INDONESI

P: 8AUG2019 117731 6.0S 102.0E 4.0-5.5 BBAAA So. of Sumatera

O: 11AUG2019 04:52:40 9.3N 125.9E mb=4.9 EMSC MINDANAO, PHILIPPINES

P: 9AUG2019 117711 8.0N 125.0E 4.0-5.3 ABAAA Central Philippines

O: 10AUG2019 13:26:44 8.6S 110.1E mb=4.6 EMSC JAVA, INDONESIA

O: 10AUG2019 21:59:10 8.7S 108.7E ML=4.1 EMSC JAVA, INDONESIA

P: 4AUG2019 117730 9.0S 108.0E 4.0-5.3 CAAAA So. of Java

O: 11AUG2019 01:55:36 18.1S 178.1W mb=4.5 EMSC FIJI REGION

P: 6AUG2019 117901 18.0S 180.0W 4.0-5.3 BABAA Tonga Islands

CENTRAL AND SOUTH AMERICA

O: 10AUG2019 17:16 31.8S 71.4W mb=4.7 GUC Coquimbo at Illapel; IV in Can

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BABAA Central Chile

CSN reported this earthquake was felt with intensity V in Coquimbo at Illapel; IV in Canela,k Salamanca and III in Comb arbala, Los Vilos, Mone Patria, and Punitaqui and III in Zapallar, Valparaiso Chile.

O: 10AUG2019 23:36 28.0S 66.8W mb=4.8 GUC Atacama at Copiapo and Tierra

P: 8AUG2019 117906 28.0S 68.0W 4.0-5.3 AAAAA Argentina

CSN reported this earthquake was felt with intensity III in Atacama at Copiapo and Tierra Amarilla, Chile.

O: 10AUG2019 20:43:12 17.4N 95.7W ML=4.0 EMSC OAXACA, MEXICO

P: 31JUL2019 117535 18.0N 97.0W 3.5-5.0 DAAAA Oaxaca, Mexico

O: 11AUG2019 04:36:37 8.8S 74.5W mb=4.5 EMSC CENTRAL PERU

O: 10AUG2019 16:36:00 8.8S 74.7W ML=4.7 EMSC CENTRAL PERU

O: 10AUG2019 13:32:00 5.7S 78.8W ML=4.3 EMSC NORTHERN PERU

P: 11AUG2019 117726 8.0S 78.0W 4.0-5.3 ACAAA No. Peru

NEIC reported this earthquake of M 4.5 in Central Peru was felt with intensity II-III in the area(s) of Central Peru at Huaraz, Ancash and Santa Rosa, Lambayeque.

O: 10AUG2019 10:06:44 15.9N 95.2W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 10AUG2019 18:45:44 16.9N 94.4W ML=4.3 EMSC OAXACA, MEXICO

P: 8AUG2019 117740 14.0N 92.0W 3.5-5.1 ACBAA Guatemala

O: 10AUG2019 17:59:20 16.9N 100.6W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO

P: 6AUG2019 117749 17.0N 100.0W 3.5-5.1 BAAAA Oaxaca, Mexico

O: 10AUG2019 20:43:12 17.4N 95.7W ML=4.0 EMSC OAXACA, MEXICO

P: 31JUL2019 117535 18.0N 97.0W 3.5-5.0 DAAAA Oaxaca, Mexico

O: 10AUG2019 17:14:10 19.1N 70.3W ML=3.0 EMSC DOMINICAN REPUBLIC

O: 10AUG2019 16:05:02 19.4N 68.0W Md=3.1 EMSC DOMINICAN REPUBLIC REGION

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 ABAAA Puerto Rico

O: 10AUG2019 20:43:52 19.9N 69.8W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

O: 11AUG2019 02:04:49 19.9N 70.8W ML=3.3 EMSC DOMINICAN REPUBLIC REGION

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 CAAAA Puerto Rico

O: 10AUG2019 23:36:42 28.1S 66.8W mb=4.8 EMSC CATAMARCA, ARGENTINA

O: 10AUG2019 19:06:47 28.1S 67.4W mb=4.4 EMSC CATAMARCA, ARGENTINA

P: 8AUG2019 117906 28.0S 68.0W 4.0-5.3 AAAAA Argentina

O: 10AUG2019 17:16:04 31.7S 71.6W mb=4.8 EMSC OFFSHORE COQUIMBO, CHILE

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BABAA Central Chile

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 10AUG2019 16:58:27 27.0S 26.5E mb=4.7 EMSC SOUTH AFRICA

P: 11AUG2019 117911 22.0S 33.0E 4.0-5.3 ACCAA So. Indian Ocean

O: 11AUG2019 07:02:50 34.3N 25.0E mb=5.0 EMSC CRETE, GREECE

P: 6AUG2019 117784 34.0N 27.0E 3.0-4.3 BABAA Crete

O: 10AUG2019 11:22:48 41.6N 46.6E mb=4.1 EMSC AZERBAIJAN

O: 11AUG2019 03:29:20 41.6N 46.6E mb=4.4 EMSC AZERBAIJAN

O: 10AUG2019 07:35:10 41.8N 46.8E mb=4.9 EMSC AZERBAIJAN

P: 11AUG2019 117830 40.0N 50.0E 4.0-5.4 ABCAA Kazakhstan

SOUTHWEST PACIFIC

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 11AUG2019 03:10:32 0.4S 91.6W ML=3.8 EMSC GALAPAGOS ISLANDS, ECUADOR

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 11AUG2019 03:17:45 47.9N 156.2E mb=4.4 EMSC EAST OF KURIL ISLANDS

P: 9AUG2019 117851 49.0N 153.0E 3.5-5.3 ABBAA So. Kurils

O: 10AUG2019 08:39:23 37.6N 134.7E mb=4.0 EMSC SEA OF JAPAN

P: 7AUG2019 117782 34.0N 136.0E 3.5-4.8 BCAAA Central/So. Honshu Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 10AUG2019 18:53:06 30.8N 115.3W ML=3.7 EMSC BAJA CALIFORNIA, MEXICO

O: 10AUG2019 08:28:46 31.2N 114.2W ML=4.5 EMSC GULF OF CALIFORNIA

P: 11AUG2019 117801 30.2N 114.1W 2.0-3.8 AAAAA SW U.S.A

O: 11AUG2019 01:21:08 35.6N 117.5W Ml=2.9 EMSC SOUTHERN CALIFORNIA

P: 11AUG2019 117808 35.7N 118.1W 2.5-4.5 AAAAA So. California

O: 10AUG2019 09:44:25 35.6N 120.9W Md=2.5 EMSC CENTRAL CALIFORNIA

P: 9AUG2019 117799 35.7N 121.2W 2.5-4.3 AAAAA Off So. California

NEIC reported this earthquake of M 2.5 in Central California was felt with intensity II-III in the area(s) of Central California at Templeton.

O: 10AUG2019 14:02:19 38.9N 123.2W Md=2.5 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117779 38.8N 122.8W 2.5-4.3 AAAAA Central California

O: 11AUG2019 06:32:07 39.7N 122.6W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 11AUG2019 05:55:48 40.1N 122.3W Md=2.5 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117840 40.6N 122.4W 2.5-4.3 BAAAA Northern California

NEIC reported this earthquake of M 2.5 in Northern California was felt with intensity II-III in the area(s) of Hopland and Yorkville, California.

O: 11AUG2019 01:41:31 40.3N 125.3W ML=3.3 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 10AUG2019 117841 40.9N 126.3W 2.5-4.3 AAAAA Off Coast of No. Calif

NEIC reported this earthquake of M 3.3 offshore Northern California was felt with intensity II-III in the area(s) offshore Northern California at Eureka.

O: 10AUG2019 08:58:52 40.7N 121.5W Md=2.5 EMSC NORTHERN CALIFORNIA

O: 10AUG2019 13:26:08 40.7N 121.5W Md=2.5 EMSC NORTHERN CALIFORNIA

O: 10AUG2019 09:06:29 40.7N 121.5W Md=3.1 EMSC NORTHERN CALIFORNIA

P: 9AUG2019 117845 42.2N 120.3W 2.0-3.9 ABAAA Oregon state, U.S.

ALASKA

O: 10AUG2019 21:38:54 52.3N 168.3W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 9AUG2019 117863 51.7N 166.4W 3.5-4.8 AAAAA Fox Islands, Aleutians

O: 10AUG2019 12:28:25 56.2N 149.4W ML=3.3 EMSC GULF OF ALASKA

O: 11AUG2019 05:11:22 58.0N 137.7W ML=2.9 EMSC OFF COAST OF SOUTHEASTERN ALAS

P: 9AUG2019 117875 60.0N 139.0W 3.2-4.8 ABAAA Central Alaska

O: 11AUG2019 05:52:06 58.9N 157.4W ML=3.3 EMSC ALASKA PENINSULA

P: 6AUG2019 117878 60.3N 153.0W 3.2-4.8 BBCAA Central Alaska

NEIC reported this earthquake of M 3.3 in the Alaska Peninsula was felt with intensity II-III in the area(s) of South Naknek, Alaska Peninsula.

O: 11AUG2019 01:45:00 69.6N 145.0W ml=3.6 EMSC NORTHERN ALASKA

P: 7AUG2019 117883 69.0N 144.0W 3.0-4.5 BAAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

No earthquakes of M>=2 were located in the Rocky Mountain region today.

EASTERN U.S./CANADA

O: 11AUG2019 00:08:07 36.5N 99.0W ML=2.2 EMSC OKLAHOMA

P: 8AUG2019 117814 39.0N 99.0W 2.0-3.9 BCAAA Southern Plains

HAWAII

O: 10AUG2019 23:19:13 19.3N 155.2W ML=3.5 EMSC ISLAND OF HAWAII, HAWAII

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

NEIC reported this earthquake of M 3.5 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Volcano, Pahoa, Mountain View, Kurtistown, Hilo, Keaau, Papaikou, Naalehu, Pepeekep and Hakalau.

MODERATE QUAKES IN KAMCHATKA, RUSSIA

EARTHQUAKE SUMMARY FOR AUGUST 9, 2019

The strongest earthquake in the world today was an M 5.5 in the region of Kamchatka, Russia. It was not reported felt in this remote area. It joined three other moderate sized regional events in the Kamchatka area including an M 5.0. This is unusual for the region, but not uncommon. The last earthquake within about 200 of this epicenter in Kamchatka with M>=5.5 occurred November 14, 2018 with M 6.1 and before that on March 29, 2017 with M 6.6. Forecast 117862 had expected today's M 5.5 was likely in Kamchatka in early August.

O: 9AUG2019 21:26:58 55.9N 161.8E Mw=5.5 EMSC NEAR EAST COAST OF KAMCHATKA

P: 3AUG2019 117862 52.0N 161.0E 4.0-5.3 CCAAA E. of Kamchatka

O: 10AUG2019 05:12:30 53.6N 162.2E mb=4.1 EMSC OFF EAST COAST OF KAMCHATKA

P: 3AUG2019 117862 52.0N 161.0E 4.0-5.3 CBAAA E. of Kamchatka

O: 9AUG2019 22:35:50 54.9N 160.7E mb=5.0 EMSC NEAR EAST COAST OF KAMCHATKA

P: 4AUG2019 117864 52.0N 158.0E 4.0-5.7 BCBAA Kamchatka

O: 10AUG2019 00:33:50 55.8N 162.2E mb=4.0 EMSC NEAR EAST COAST OF KAMCHATKA

P: 31JUL2019 117646 56.0N 166.0E 4.0-5.5 CACAA Komandorsky Isl

The second strongest felt earthquake in the world today was an M 5.2 in northern Qinghai, China. The last earthquake within about 200 km of this epicenter in China with M>=5.2 was an M 5.2 on August 13, 2016; the last such event of larger magnitude was an M 5.9 within about 25 km of today's epicenter on January 20, 2016. There were no such events in the area between 2004 and 2016. Forecast 117809 had expected today's event within about 50 km was likely around August 10. This epicenter is in the antipodal area of the M 6.8 in Central Chile of August 1 and may have been promoted by focused energy from that event.

O: 9AUG2019 07:23:51 37.8N 101.7E mb=5.2 EMSC NORTHERN QINGHAI, CHINA

P: 10AUG2019 117809 38.0N 101.0E 3.5-4.8 AAAAA So. China

About a day after the event in China, an M 5.4 occurred in Tajikistan directly east of the Chinese event. This is probably related to the M 5.8 in Afghanistan two days ago of August 8. The last such event other than that with M>=5.4 within about 200 km of today's epicenter was an M 5.6 on February 2, 2019. Forecast 117785 had expected today's event in this area was likely around August 9.

NEIC reported this earthquake of M 5.4 in Tajikistan was felt with intensity V in Mingaora, North-west Pakistan and II-III in the area(s) of Tajikistan at Dushanbe and in Gujranwala, Punjab, Pakistan.

O: 10AUG2019 06:43:11 37.2N 71.6E mb=5.4 EMSC TAJIKISTAN

P: 9AUG2019 117785 38.0N 73.0E 3.8-5.1 AAAAA Hindu Kush/Pakistan

The strongest earthquake in the U.S. or Canada today was an M 4.2 in the Rat Islands, Aleutians. It was not reported felt in this remote area. The last earthquake of M>=4.2 in the active Rat Islands within about 200 km of this epicenter occurred as an M 4.5 on August 5, 2019. Forecast 117870 had expected today's event was likely around August 8.

Elevated seismicity along the Anatolian Fault Zone in Greece and Turkey also continued today. An M 4.5 occurred in Southern Greece in this current activation. NEIC reported this earthquake of M 4.5 in Southern Greece was felt with intensity II-III in the area(s) of Southern Greece at Kalamakion, and Katastrion, Zakinthos and Meligalas, Messinia. This follows an M 5.8 in western Turkey yesterday and may have been promoted from that event. The last earthquake in Greece within about 100 km of this epicenter of larger magnitude was an M 4.7 on May 21, 2019. Forecast 117792 had expected today's event was likely within about 25 km of this epicenter around August 11.

O: 9AUG2019 21:39:41 37.2N 21.2E Mw=4.5 EMSC SOUTHERN GREECE

P: 11AUG2019 117792 37.0N 21.0E 3.0-4.3 AAAAA No. Greece

O: 9AUG2019 19:45:30 51.9N 179.9E mb=4.2 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 8AUG2019 117870 51.0N 178.0E 4.0-5.5 AABAA Rat Islands

An M 4.1 also occurred today off the coast of Oregon. NEIC reported this earthquake of M 4.1 off the Oregon coast may have been felt with intensity II in Newberg, Oregon. The M 3.3 off the coast of Oregon may have been felt with intensity II-III in the area(s) of on the coast of Oregon at Rockaway Beach and Clackamas. This was the largest event in the U.S. outside Alaska today. The last activity off the Coast of Oregon with M>=4 occurred on July 3, 2019 (M 4.1) in a regional activation which led to the M 7.1 in Central California on July 6. Forecast 117843 had expected today's event was likely around August 6.

O: 9AUG2019 16:39:43 43.8N 129.6W mb=4.1 EMSC OFF COAST OF OREGON

P: 6AUG2019 117843 44.5N 129.8W 3.0-4.4 BAAAA Off Coast of Oregon

The most unusual earthquake in the U.S. today was an M 2.8 in Mississippi where it was widely felt. NEIC reported this earthquake of M 2.8 in Mississippi was felt with intensity II-III in the area(s) of Mississippi Madison, Brandon, Canton, Ridgeland, Flora, Jackson, Vicksburg, Ellisville, and Natchez. The only earthquake in Mississippi of M>=2 in the past year was an M 3.7 on January 8, 2019. Forecast 117812 had expected today's event was possible within about 200 km around August 8.

O: 9AUG2019 07:33:05 32.5N 90.0W mb=2.8 EMSC MISSISSIPPI

P: 8AUG2019 117812 34.0N 92.0W 2.0-3.8 ABBAA Southeast U.S.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 9AUG2019 12:40:32 27.4N 84.5E ML=4.6 EMSC NEPAL-INDIA BORDER REGION

P: 31JUL2019 117603 30.0N 80.0E 3.8-5.1 CCCAA Xizang

O: 10AUG2019 06:43:11 37.2N 71.6E mb=5.4 EMSC TAJIKISTAN

P: 9AUG2019 117785 38.0N 73.0E 3.8-5.1 AAAAA Hindu Kush/Pakistan

O: 9AUG2019 07:23:51 37.8N 101.7E mb=5.2 EMSC NORTHERN QINGHAI, CHINA

P: 10AUG2019 117809 38.0N 101.0E 3.5-4.8 AAAAA So. China

O: 9AUG2019 13:05:32 41.3N 83.3E mb=4.5 EMSC SOUTHERN XINJIANG, CHINA

O: 9AUG2019 18:22:58 51.8N 93.8E mb=4.0 EMSC SOUTHWESTERN SIBERIA, RUSSIA

P: 11AUG2019 117871 51.0N 98.0E 3.0-4.3 AACAA So. Siberia

O: 10AUG2019 05:12:30 53.6N 162.2E mb=4.1 EMSC OFF EAST COAST OF KAMCHATKA

P: 3AUG2019 117862 52.0N 161.0E 4.0-5.3 CBAAA E. of Kamchatka

O: 9AUG2019 22:35:50 54.9N 160.7E mb=5.0 EMSC NEAR EAST COAST OF KAMCHATKA

P: 4AUG2019 117864 52.0N 158.0E 4.0-5.7 BCBAA Kamchatka

O: 10AUG2019 00:33:50 55.8N 162.2E mb=4.0 EMSC NEAR EAST COAST OF KAMCHATKA

P: 31JUL2019 117646 56.0N 166.0E 4.0-5.5 CACAA Komandorsky Isl

O: 9AUG2019 21:26:58 55.9N 161.8E Mw=5.5 EMSC NEAR EAST COAST OF KAMCHATKA

P: 3AUG2019 117862 52.0N 161.0E 4.0-5.3 CCAAA E. of Kamchatka

INDONESIA AND PHILIPPINES

O: 9AUG2019 07:30:25 1.6N 124.6E ML=4.0 EMSC MINAHASA, SULAWESI, INDONESIA

P: 11AUG2019 117715 1.0N 126.0E 4.0-5.3 AABAA Mindanao, Philippines

O: 9AUG2019 15:57:02 6.1N 126.9E ML=4.5 EMSC MINDANAO, PHILIPPINES

P: 9AUG2019 117711 8.0N 125.0E 4.0-5.3 ABBAA Central Philippines

O: 9AUG2019 18:20:58 7.5S 118.6E ML=4.3 EMSC FLORES SEA

O: 9AUG2019 08:10:31 9.8S 119.4E ML=4.2 EMSC SUMBA REGION, INDONESIA

P: 6AUG2019 117729 9.0S 114.0E 4.0-5.3 BACAA So. of Bali

O: 9AUG2019 11:45:22 21.8N 145.0E mb=4.7 EMSC MARIANA ISLANDS REGION

P: 11AUG2019 117768 23.0N 143.0E 4.0-5.3 ABBAA Volcano Islands

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 10AUG2019 01:31:30 9.7N 86.3W ML=4.0 EMSC OFF COAST OF COSTA RICA

O: 9AUG2019 20:48:30 10.2N 86.5W ML=4.4 EMSC OFF COAST OF COSTA RICA

P: 5AUG2019 117713 9.0N 84.0W 3.5-4.9 BBBAA Costa Rica

O: 10AUG2019 02:11:26 12.8N 88.6W ML=4.2 EMSC OFFSHORE EL SALVADOR

P: 7AUG2019 117746 13.0N 88.0W 3.5-5.0 BAAAA Nicaragua

O: 9AUG2019 17:04:01 13.2N 89.3W mb=4.5 EMSC OFFSHORE EL SALVADOR

P: 11AUG2019 117740 13.0N 90.0W 3.5-5.0 AAAAA Guatemala

NEIC reported this earthquake of M 4.5 in El Salvador was felt with intensity II-III in the area(s) of El Salvador at Antiguo Cuscatlan, La Libertad and San Salvador.

O: 9AUG2019 22:27:53 16.1S 70.4W Mw=4.7 EMSC SOUTHERN PERU

P: 11AUG2019 117899 18.0S 71.0W 4.0-5.3 ABAAA So. Peru/Bolivia

O: 9AUG2019 14:21:43 19.0N 65.0W mb=4.3 EMSC VIRGIN ISLANDS REGION

P: 6AUG2019 117751 19.0N 66.0W 3.4-4.8 BAAAA Puerto Rico

NEIC reported this earthquake of M 4.3 in the U.S. Virgin Islands was felt with intensity II-III in the area(s) of Manati, Puerto Rico.

O: 9AUG2019 16:53:52 23.3S 63.7W ML=4.3 EMSC SALTA, ARGENTINA

P: 3AUG2019 117905 24.0S 64.0W 4.0-5.4 CAAAA Argentina

O: 9AUG2019 18:33:46 24.3S 67.0W ML=4.2 EMSC SALTA, ARGENTINA

P: 5AUG2019 117905 24.0S 67.0W 4.0-5.4 BAAAA Argentina

O: 9AUG2019 22:45:11 31.3S 67.6W ML=4.1 EMSC SAN JUAN, ARGENTINA

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BAAAA Central Chile

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 9AUG2019 21:39:41 37.2N 21.2E Mw=4.5 EMSC SOUTHERN GREECE

P: 11AUG2019 117792 37.0N 21.0E 3.0-4.3 AAAAA No. Greece

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 9AUG2019 13:09:46 4.3S 152.9E mb=5.3 EMSC NEW BRITAIN REGION, P.N.G.

P: 10AUG2019 117724 6.0S 154.0E 4.0-5.3 ABAAA New Britain

NEIC reported this earthquake of M 5.3 in Papua New Guinea was felt with intensity II-III in the area(s) of Papua New Guinea at Kokopo, New Britain.

O: 9AUG2019 17:45:58 21.4S 174.2W mb=5.4 EMSC TONGA

P: 11AUG2019 117901 19.0S 174.0W 4.0-5.3 ACAAA Tonga Islands

O: 9AUG2019 09:37:16 25.4S 177.2W mb=4.8 EMSC SOUTH OF FIJI ISLANDS

P: 9AUG2019 117913 27.0S 176.0W 4.0-5.3 ACAAA Tonga Islands

OCEAN RIDGES

O: 10AUG2019 03:41:21 7.5N 37.0W mb=5.1 EMSC CENTRAL MID-ATLANTIC RIDGE

P: 4AUG2019 117709 5.0N 33.0W 4.0-5.5 CCCAA Central Mid-Atlantic Ridg

O: 9AUG2019 09:26:02 35.0S 112.0W mb=4.7 EMSC SOUTHERN EAST PACIFIC RISE

O: 9AUG2019 11:22:51 35.0S 112.0W mb=4.8 EMSC SOUTHERN EAST PACIFIC RISE

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 9AUG2019 17:17:21 26.3N 126.6E mb=4.5 EMSC RYUKYU ISLANDS, JAPAN

P: 8AUG2019 117765 26.0N 126.0E 4.0-5.3 AAAAA Ryukyu Islands

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 9AUG2019 17:51:35 33.8N 117.7W ML=2.1 EMSC GREATER LOS ANGELES AREA, CALI

O: 9AUG2019 16:42:20 33.9N 118.8W Ml=2.8 EMSC CHANNEL ISLANDS REG., CALIFORN

P: 7AUG2019 117807 34.2N 117.5W 2.5-4.3 AABAA So. California

NEIC reported this earthquake of M 2.8 in the Channel Islands, California was felt with intensity II-III in the area(s) of the Channel Islands, California at Malibu, Santa Monica, Rancho Palos Verdes, and San Diego.

O: 9AUG2019 19:07:10 35.6N 117.4W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 9AUG2019 15:23:04 35.7N 117.5W ML=3.0 EMSC SOUTHERN CALIFORNIA

O: 9AUG2019 21:07:18 35.7N 117.5W ML=3.1 EMSC SOUTHERN CALIFORNIA

P: 11AUG2019 117808 35.7N 118.1W 2.5-4.5 AAAAA So. California

O: 9AUG2019 07:15:43 36.1N 120.2W Md=2.4 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117776 36.1N 120.1W 2.5-4.3 AAAAA Central California

O: 9AUG2019 21:02:49 36.8N 121.6W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 8AUG2019 117777 36.2N 121.8W 2.5-4.4 AAAAA Central California

O: 9AUG2019 09:21:46 37.6N 118.8W Md=2.5 EMSC CENTRAL CALIFORNIA

O: 9AUG2019 20:31:53 37.6N 118.9W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117773 37.4N 118.6W 2.5-4.3 AAAAA California/Nevada area

O: 9AUG2019 19:50:45 37.9N 118.6W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 5AUG2019 117775 38.7N 119.7W 2.5-4.5 BAAAA California/Nevada area

O: 10AUG2019 03:57:09 38.8N 122.7W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117779 38.8N 122.8W 2.5-4.3 AAAAA Central California

O: 9AUG2019 21:31:46 39.8N 122.7W Md=2.0 EMSC NORTHERN CALIFORNIA

O: 9AUG2019 20:12:39 39.8N 122.7W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117840 40.6N 122.4W 2.5-4.3 AAAAA Northern California

O: 10AUG2019 05:29:53 40.3N 124.5W Md=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 7AUG2019 117841 40.3N 124.7W 2.5-4.3 BAAAA Off Coast of No. Calif

ALASKA

O: 9AUG2019 19:45:30 51.9N 179.9E mb=4.2 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 8AUG2019 117870 51.0N 178.0E 4.0-5.5 AABAA Rat Islands

O: 9AUG2019 08:52:01 57.0N 149.7W ML=3.4 EMSC GULF OF ALASKA

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 9AUG2019 16:39:43 43.8N 129.6W mb=4.1 EMSC OFF COAST OF OREGON

P: 6AUG2019 117843 44.5N 129.8W 3.0-4.4 BAAAA Off Coast of Oregon

O: 9AUG2019 22:14:41 44.0N 128.9W ML=3.3 EMSC OFF COAST OF OREGON

P: 10AUG2019 117842 43.9N 128.4W 3.0-4.3 AAAAA Off Coast of Oregon

O: 10AUG2019 06:08:36 46.2N 120.8W Ml=2.0 EMSC WASHINGTON

ROCKY MOUNTAINS REGION

O: 10AUG2019 04:16:44 35.2N 107.9W ML=2.8 EMSC NEW MEXICO

P: 1AUG2019 117783 37.1N 104.7W 2.0-3.8 ABCAA Colorado area

O: 9AUG2019 16:02:27 44.7N 114.1W ML=3.2 EMSC SOUTHERN IDAHO

P: 8AUG2019 117835 44.4N 114.1W 2.0-3.9 AAAAA Montana/Idaho

NEIC reported this earthquake of M 3.2 in Idaho was felt with intensity II-III in the area(s) of Challis, Idaho.

EASTERN U.S./CANADA

O: 10AUG2019 01:35:11 35.3N 97.7W ML=2.0 EMSC OKLAHOMA

O: 9AUG2019 16:08:43 35.7N 97.4W mb=2.5 EMSC OKLAHOMA

O: 10AUG2019 05:38:46 36.8N 98.1W mb=2.7 EMSC OKLAHOMA

P: 9AUG2019 117813 36.0N 97.0W 2.0-3.8 AAAAA Southern Plains

NEIC reported this earthquake of M 3.2 in Oklahoma was felt with intensity II-III in the area(s) of Waynoka, Oklahoma.

The M 2.8 was reported with intensity II-III in Edmond, Oklahoma City and Pryor, Oklahoma.

O: 9AUG2019 07:33:05 32.5N 90.0W mb=2.8 EMSC MISSISSIPPI

P: 8AUG2019 117812 34.0N 92.0W 2.0-3.8 ABBAA Southeast U.S.

O: 9AUG2019 12:04:43 37.8N 90.3W Md=2.0 EMSC SOUTHEASTERN MISSOURI

P: 4AUG2019 117791 37.0N 89.0W 2.0-3.8 BAAAA New Madrid area

O: 8AUG2019 11:17:39 47.5N 70.2W MB=3.0 ECAN La Malbaie, QC. Felt

P: 6AUG2019 117836 47.3N 70.5W 2.0-3.8 AAAAA New England

O: 8AUG2019 02:27:09 77.5N 101.7W MB=2.1 ECAN Isachsen, NU

O: 7AUG2019 23:14:50 74.7N 83.6W MB=2.1 ECAN Dundas Harbour, NU

HAWAII

O: 9AUG2019 19:13:51 19.3N 155.2W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

P: 11AUG2019 117741 19.4N 155.3W 3.0-4.3 AAAAA Hawaii

NEIC reported this earthquake of M 3.2 in Hawaii was felt with intensity II-III in the area(s) of Volcano, Hilo and Papaikou, Hawaii.

STRONG EARTHQUAKE IN WESTERN TURKEY

EARTHQUAKE SUMMARY FOR AUGUST 8, 2019

Strong seismicity continued today near 103 degrees from the M 7.1 in Southern California of July 6, 2019. Seismic energy is concentrated at this distance from large surface disturbances by reflection and refraction of seismic energy off the core-mantle boundary back to the surface where it arrives in this distance zone. Yesterday moderately strong earthquakes in Taiwan and Hindu Kush, Afghanistan occurred near this distance from Southern California. Today an M 5.8 was widely felt in western Turkey at 101-102 from the California epicenters. Today's event was preceded by a series of light foreshocks and at least one moderate event of M 4.6 to the west of the mainshock epicenter. This appears to be part of the activation of the Anatolian Fault Zone which began shortly after the mainshocks in California as noted in previous issues of this report:

"Energy on the surface from California does not have a good angle with the east-west orientation of the North Anatolian Fault though, so a major quake in this area, while it could happen, is unlikely to have been triggered from California.

Still, the conditions may be ripe for a moderate quake in northern Turkey or Greece at this time. Both areas respond to geomagnetic storms." (July 10, 2019)

Note that these areas including Turkey were known to respond to geomagnetic storms. The storm of August 4-6 is now declining and immediate effects on seismicity may be completed in today's activity in northwestern Turkey. But a strong related earthquake to the geomagnetic storm is still possible around August 10-12 as noted:

"The geomagnetic field saw minor to major storm conditions today. The AP level was 6. High latitude geomagnetic field saw active conditions with AP at 7. This concludes the greatest disturbance in the geomagnetic field since AP reached 36 on May 14, 2019. The last storm of significantly larger AP occurred nearly a year ago on August 26, 2008 when AP reached 76 and high latitude AP was 90. Seismic increases are likely at high latitudes and within about 15 degrees of the geomagnetic equator beginning August 6 through August 11 due to triggering effects from this storm. The most likely timing of a strong to major event is August 10-12, the most likely regions - Indonesia, the Philippines the Southwest Pacific and Alaska." (August 5-7, 2019)

NEIC reported the M 5.8 in Turkey was felt with maximum intensity VI in Turkey at Isparta and IV in Denizli and Antalya with lesser II-III shaking reported from Baklan, Yesilova, Akkoy, Karacasu, Ayden, Dalaman and Fethiye Mugla, Turkey.

An M 4.2 minutes before the M 5.8 was felt with intensity III in Isparta and Manavgat, Antalya, Turkey. The M 4.6 near the coast of western Turkey which preceded both was reported by NEIC to have been felt with maximum intensity IV in Sefenhisar and Menderes, Izmit and in Kusadasi, Aydin, Turkey. Lesser shaking of II-III was reported from Urla, Izmit, Soke, Cesme and Goca, Izmit and in Kokkanon Samos, Greece.

The M 5.8 was the strongest earthquake within about 200 km of that epicenter since an M 6.0 on February 3, 2002 more than 17 years ago. Forecast 117818 and 117770 had expected today's activity was likely in early August. This epicenter is at 101-104 degrees from the Banda Sea event of June 24, 2019 (M 7.3); the M 8.0 in Peru of May 26, 2019 and the M 7.1 event in Southern California of July 6, 2019. These sources probably helped promote enhanced seismicity in Turkey at this time.

O: 8AUG2019 11:19:36 37.9N 29.6E ML=4.2 EMSC WESTERN TURKEY

O: 8AUG2019 11:25:31 37.9N 29.6E Mw=5.8 EMSC WESTERN TURKEY

P: 4AUG2019 117818 39.0N 31.0E 3.5-4.8 BBAAA Turkey

O: 8AUG2019 08:39:08 38.0N 26.9E mb=4.6 EMSC NEAR THE COAST OF WESTERN TURK

P: 6AUG2019 117770 39.0N 27.0E 3.0-4.3 AAAAA Aegean Sea

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 8AUG2019 18:04:03 38.2N 75.2E mb=4.6 EMSC SOUTHERN XINJIANG, CHINA

P: 9AUG2019 117785 38.0N 73.0E 3.8-5.1 AABAA Hindu Kush/Pakistan

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 8AUG2019 20:26:35 1.3N 126.3E mb=4.6 EMSC MOLUCCA SEA

P: 11AUG2019 117715 1.0N 126.0E 4.0-5.3 BAAAA Mindanao, Philippines

O: 8AUG2019 16:05:32 1.6N 119.2E ML=4.8 EMSC MAKASSAR STRAIT, INDONESIA

P: 5AUG2019 117733 1.0S 120.0E 4.0-5.3 BCAAA Sulawesi area

O: 9AUG2019 01:09:49 2.6S 137.4E ML=3.8 EMSC PAPUA, INDONESIA

P: 9AUG2019 117728 3.0S 133.0E 4.0-5.3 AACAA Papua New Guinea

O: 8AUG2019 17:56:45 3.7S 140.3E mb=4.8 EMSC PAPUA, INDONESIA

P: 6AUG2019 117728 2.0S 140.0E 4.0-5.3 ABAAA Papua New Guinea

O: 8AUG2019 09:11:59 7.2S 129.6E ML=4.4 EMSC KEPULAUAN BABAR, INDONESIA

O: 8AUG2019 20:53:00 7.4S 129.5E ML=4.4 EMSC KEPULAUAN BABAR, INDONESIA

P: 11AUG2019 117718 6.0S 129.0E 4.0-5.3 BBAAA Banda Sea

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 9AUG2019 02:09 32.1S 71.0W mb=5.0 GUC Valparaiso at Quillota; IV in

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BBBAA Central Chile

CSN reported this earthquake was felt with intensity V in Valparaiso at Quillota; IV in La Ligua, Los Andes, San Felipe, Zapallar and III in Casablanca, Quilpue, Valparsiao II in El Quisco and Santo Domingo; in Santiago with III in Colina, El Monte, Paine, Puente Alto, San Bernardo, Santiago, Talagante, Tiltil and in O'Higgiins with III in Rancagua and II in Navidad, Chile.

O: 8AUG2019 06:37 30.3S 71.2W mb=4.0 GUC Coquimbo at Andacollo, La Higu

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BABAA Central Chile

CSN reported this earthquake was felt with intensity IV in Coquimbo at Andacollo, La Higuera and La Serena; III in Coquimbo and Paiguano, Chile.

O: 8AUG2019 12:11:30 9.0N 84.2W ML=4.1 EMSC COSTA RICA

P: 5AUG2019 117713 9.0N 84.0W 3.5-4.9 BAAAA Costa Rica

O: 8AUG2019 19:11:01 15.5N 95.6W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

O: 8AUG2019 21:16:03 15.8N 95.2W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 7AUG2019 117748 17.0N 98.0W 3.5-5.1 ABBAA Oaxaca, Mexico

O: 9AUG2019 05:47:57 17.4N 94.7W mb=4.2 EMSC VERACRUZ, MEXICO

P: 29JUL2019 117523 17.0N 94.0W 3.5-5.0 CAAAA Chiapas, Mexico

O: 9AUG2019 05:01:14 18.4N 69.1W ML=3.7 EMSC DOMINICAN REPUBLIC

O: 8AUG2019 08:35:44 18.9N 69.4W ML=3.1 EMSC DOMINICAN REPUBLIC

O: 9AUG2019 03:19:40 19.7N 69.8W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 AAAAA Puerto Rico

O: 9AUG2019 02:09:35 32.1S 70.9W mb=4.9 EMSC VALPARAISO, CHILE

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BBBAA Central Chile

NEIC reported this earthquake of M 4.9 in Valparaiso, Chile was felt with intensity IV in Llaillay, Valparaiso and II-III in the area(s) of Valparaiso, Chile Quillota, Vina del Mar, Valparaiso and in Santiago at Penaflor, San Bernardo and Puente Alto.

O: 8AUG2019 11:26:19 38.3S 75.1W ML=4.4 EMSC OFF COAST OF ARAUCANIA, CHILE

P: 6AUG2019 117918 37.0S 73.0W 4.0-5.4 ABBAA Central Chile

AFRICA AND EUROPE

O: 9AUG2019 02:24:29 33.3N 35.4E Mc=3.4 EMSC LEBANON - SYRIA REGION

P: 6AUG2019 117816 35.0N 33.0E 3.5-4.8 BBBAA Turkey

O: 8AUG2019 11:19:36 37.9N 29.6E ML=4.2 EMSC WESTERN TURKEY

O: 8AUG2019 11:25:31 37.9N 29.6E Mw=5.8 EMSC WESTERN TURKEY

P: 4AUG2019 117818 39.0N 31.0E 3.5-4.8 BBAAA Turkey

O: 8AUG2019 08:39:08 38.0N 26.9E mb=4.6 EMSC NEAR THE COAST OF WESTERN TURK

P: 6AUG2019 117770 39.0N 27.0E 3.0-4.3 AAAAA Aegean Sea

O: 8AUG2019 07:49:46 45.6N 26.7E ML=3.6 EMSC ROMANIA

P: 5AUG2019 117849 46.0N 26.0E 3.0-4.8 BAAAA Romania/NW Turkey

O: 8AUG2019 16:52:06 50.1N 5.1W ML=2.2 EMSC ENGLAND, UNITED KINGDOM

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 9AUG2019 02:54:37 5.1S 151.2E Mw=5.3 EMSC NEW BRITAIN REGION, P.N.G.

P: 10AUG2019 117724 6.0S 154.0E 4.0-5.3 AACAA New Britain

O: 9AUG2019 01:39:03 23.9S 179.7W mb=4.7 EMSC SOUTH OF FIJI ISLANDS

P: 10AUG2019 117913 22.0S 180.0W 4.0-5.3 ABAAA Tonga Islands

OCEAN RIDGES

O: 9AUG2019 01:55:55 4.7S 106.1W mb=4.7 EMSC CENTRAL EAST PACIFIC RISE

P: 7AUG2019 117725 4.0S 104.0W 4.0-5.4 AABAA No. East Pacific Rise

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

ZEALANDIA AND AUSTRALIA REGION

O: 9AUG2019 02:55:17 19.8S 148.7E ML=3.5 EMSC QUEENSLAND, AUSTRALIA

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 8AUG2019 18:56:46 25.6N 124.8E mb=5.1 EMSC NORTHEAST OF TAIWAN

P: 8AUG2019 117765 26.0N 126.0E 4.0-5.3 AAAAA Ryukyu Islands

O: 8AUG2019 08:25:29 52.3N 152.6E mb=4.2 EMSC NORTHWEST OF KURIL ISLANDS

P: 9AUG2019 117851 49.0N 153.0E 3.5-5.3 ACAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 8AUG2019 10:35:42 31.9N 115.8W ML=2.4 EMSC BAJA CALIFORNIA, MEXICO

P: 5AUG2019 117803 32.0N 116.3W 2.5-4.3 BAAAA So. California

O: 8AUG2019 17:43:58 35.5N 118.4W Ml=2.3 EMSC CENTRAL CALIFORNIA

P: 4AUG2019 117808 35.3N 118.6W 2.5-4.5 BAAAA So. California

O: 8AUG2019 22:55:44 35.7N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 9AUG2019 00:09:57 35.9N 117.7W ML=3.0 EMSC CENTRAL CALIFORNIA

O: 9AUG2019 02:32:42 36.1N 117.3W Ml=2.7 EMSC CENTRAL CALIFORNIA

P: 4AUG2019 117772 35.7N 117.5W 2.5-4.4 BAAAA California/Nevada area

O: 9AUG2019 04:39:07 36.2N 118.2W ML=3.2 EMSC CENTRAL CALIFORNIA

O: 9AUG2019 01:51:24 36.2N 118.2W Ml=2.7 EMSC CENTRAL CALIFORNIA

P: 8AUG2019 117771 36.3N 118.1W 2.5-4.6 AAAAA California/Nevada area

O: 9AUG2019 04:32:18 37.3N 121.6W Md=2.6 EMSC NORTHERN CALIFORNIA

O: 8AUG2019 20:31:33 37.4N 121.6W Md=2.7 EMSC NORTHERN CALIFORNIA

P: 5AUG2019 117778 37.4N 121.8W 2.5-4.3 BAAAA Central California

NEIC reported this earthquake of M 2.7 in Northern California was felt with intensity II-III in the area(s) of Northern California in Mount Hamilton, San Jose, Sunnyvale, Hayward, Redwood City, and Stockton.

NEIC reported the earthquake of M 2.6 in Central California was felt with intensity II-III in the area(s) of San Jose and Morgan Hill, California.

O: 8AUG2019 16:03:18 38.5N 119.6W MD=2.3 EMSC NORTHERN CALIFORNIA

P: 5AUG2019 117775 38.7N 119.7W 2.5-4.5 BAAAA California/Nevada area

O: 8AUG2019 17:15:43 38.8N 122.8W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117779 38.8N 122.8W 2.5-4.3 AAAAA Central California

O: 8AUG2019 16:53:29 40.4N 125.6W Md=2.9 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 10AUG2019 117841 40.9N 126.3W 2.5-4.3 AAAAA Off Coast of No. Calif

ALASKA

No events of M>=3 were located in Alaska today.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

O: 8AUG2019 12:25:12 32.7N 109.1W ML=2.6 EMSC ARIZONA

NEIC reported this earthquake of M 2.6 in Arizona was felt with intensity II-III in the area(s) of Arizona at Phoenix and Prescott Valley and in Lordsburg, New Mexico.

O: 9AUG2019 03:46:52 45.9N 111.4W ML=3.1 EMSC WESTERN MONTANA

P: 11AUG2019 117835 45.7N 112.1W 2.0-3.9 AAAAA Montana/Idaho

NEIC reported this earthquake of M 3.1 in Western Montana was felt with intensity II-III in the area(s) of Western Montana at Three Forks, Manhattan, Belgrade and Bozeman.

EASTERN U.S./CANADA

O: 8AUG2019 10:17:27 35.1N 95.4W ML=2.3 EMSC OKLAHOMA

P: 9AUG2019 117813 36.0N 97.0W 2.0-3.8 AAAAA Southern Plains

O: 8AUG2019 11:19:27 35.2N 99.5W ML=2.6 EMSC OKLAHOMA

P: 11AUG2019 117802 35.4N 101.8W 2.0-3.9 BABAA SW U.S.A

O: 9AUG2019 06:34:58 35.8N 98.1W mb=3.1 EMSC OKLAHOMA

P: 9AUG2019 117813 36.0N 97.0W 2.0-3.8 AAAAA Southern Plains

NEIC reported this earthquake of M 3.5 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Edmond, Oklahoma City and Norman.

O: 9AUG2019 02:13:54 37.1N 98.0W mb=2.8 EMSC KANSAS

P: 5AUG2019 117814 38.0N 98.0W 2.0-3.9 BAAAA Southern Plains

O: 8AUG2019 11:17:39 47.5N 70.3W mb=2.6 EMSC ST. LAWRENCE VALLEY REG., CANA

O: 08AUG2019 11:17:39 47.5N 70.2W MB=3.0 ECAN La Malbaie, QC. Felt

O: 07AUG2019 16:46:32 47.5N 70.4W MB=1.8 ECAN Charlevoix Seismic Zone

O: 07AUG2019 06:37:14 47.4N 70.4W MB=0.9 ECAN Charlevoix Seismic Zone

O: 07AUG2019 03:13:09 47.5N 70.1W MB=1.0 ECAN Charlevoix Seismic Zone

P: 6AUG2019 117836 47.3N 70.5W 2.0-3.8 AAAAA New England

O: 8AUG2019 02:27:09 77.5N 101.7W MB=2.1 ECAN Isachsen, NU

O: 7AUG2019 23:14:50 74.7N 83.6W MB=2.1 ECAN Dundas Harbour, NU

HAWAII

No earthquakes of M>=3 were located in Hawaii.

STRONG QUAKES SHAKE TAIWAN AND AFGHANISTAN/PAKISTAN

EARTHQUAKE SUMMARY FOR AUGUST 7, 2019

Moderately large earthquakes were felt widely today in Taiwan (M 5.9-6.0) and in Afghanistan/Pakistan (M 5.8).

The strongest of these was an M 5.9-6.0 off the northern coast of Taiwan. NEIC reported maximum intensity V in Ilan, Taipei, and Keelung, Taiwan and IV in Taipei and Hualien. CWB reported this earthquake was felt with intensity VI in Yilan; IV in Hualien, Taipei, Hsinchu, Taoyuan, Taichung; III in Nantou, Keelung, Miaoli, Changhua and Yunlin; II in Chiayi, Tainan and I in Taitung, Kaohsiung, Pingtung and Penghu Counties, Taiwan. An aftershock of M 4.6 was reported felt with intensity III in Yilan and Taipei; II in Taoyuan and I in Hualien, Keelung, Hsinchu, Nantou, Miaoli and Taichung Counties, Taiwan.

This earthquake in northern Taiwan was probably triggered by stresses from the strong Typhoon Lekima now with winds up to 140 kts, which was situated near the epicenter at the time of the earthquake. This summary in the previous issue had expected this possibility as:

"TYPHOON LEKIMA (10W) continued east of the Northern Philippines today with winds up to 85 kts. This system is currently moving northeastward. It may strengthen and impact central Philippines and Taiwan early next week. A seismic watch may be called for Taiwan, northern and Central Philippines and the Ryukyu Islands." (August 6-7, 2019)

The last earthquake in Taiwan within about 200 km of today's epicenter with M>=6 occurred as an M 6.1 on April 18, 2019 and prior to that an M 6.4 on February 6, 2018. Forecast 117767 had expected today's event was likely within about 50 km of this epicenter around August 7. This epicenter is near 100 degrees from Southern California where an M 7.1 on July 6, 2019 may have provided energy to promote the Taiwan region.

O: 7AUG2019 21:28:05 24.5N 122.0E Mw=5.8 EMSC TAIWAN

O: 7AUG2019 21:28:03 24.4N 121.9E ML=6.0 TAI Hualien, Taiwan

O: 7AUG2019 23:02:23 24.6N 121.8E ML=4.6 EMSC TAIWAN

O: 7AUG2019 23:02:23 24.6N 121.8E ML=4.6 TAI Hualien, Taiwan

P: 7AUG2019 117767 24.0N 122.0E 4.0-5.3 AAAAA Taiwan

The earthquake in Hindu Kush, Afghanistan was reported by NEIC to have been felt with maximum intensity IV in Dirn, North-west Frontier Pakistan and II-III in Afghanistan at Kanabad, Mahmoud Raqui; in Tajikistan at Khorug Gorno-Badakhstan, Bustonkala, Khatlon, Obigarm, and Dushanbe and in North-west Frontier,, Pakistan at Tall, and Mingaora.

The last earthquake of M>=5.8 in the Hindu Kush region of Afghanistan within about 200 km of this epicenter occurred more than a year ago on May 9, 2018 with M 6.2 and prior to that on January 31, 2018 and April 10, 2016 with M 6.1 and 6.6 respectively. A major M 7.5 hit the region on October 26, 2015 and today's event may be an aftershock of that. Forecast 117785 had expected this activity in Hindu Kush was likely in early August. This epicenter is located at 107 degrees from the M 7.1 in Central California of July 6, 2019 and may have been promoted by concentrated energy from that source as suggested in previous issues of this report:

"Areas at ... or near 103 degrees from Southern California include southern New Zealand, Greece and Turkey and Iran/Iraq, Central Asia and China, the Northern Philippines, New Britain and eastern Indonesia. These areas could see enhanced seismicity in the coming days and are marked on the accompanying map by stippled white lines." (July 6, 2019)

O: 8AUG2019 06:42:45 36.5N 70.8E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN

O: 8AUG2019 00:45:26 36.6N 70.2E Mw=5.8 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 1AUG2019 117785 36.0N 72.0E 3.8-5.2 CABAA Hindu Kush/Pakistan

P: 9AUG2019 117785 38.0N 73.0E 3.8-5.1 ABBAA Hindu Kush/Pakistan

The earthquakes in Afghanistan and Taiwan are situated in locations which the geomagnetic storm of August 5-6 could have activated as both lie within about 15 degrees of the local geomagnetic equator. This summary had noted the likelihood of triggering from this storm in the previous issue as:

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 7AUG2019 21:28:05 24.5N 122.0E Mw=5.8 EMSC TAIWAN

O: 7AUG2019 23:02:23 24.6N 121.8E ML=4.6 EMSC TAIWAN

O: 7AUG2019 21:28:03 24.4N 121.9E ML=6.0 TAI Hualien, Taiwan

O: 7AUG2019 23:02:23 24.6N 121.8E ML=4.6 TAI Hualien, Taiwan

P: 7AUG2019 117767 24.0N 122.0E 4.0-5.3 AAAAA Taiwan

CWB reported this earthquake was felt with intensity VI in Yilan; IV in Hualien, Taipei, Hsinchu, Taoyuan, Taichung; III in Nantou, Keelung, Miaoli, Changhua and Yunlin; II in Chiayi, Tainan and I in Taitung, Kaohsiung, Pingtung and Penghu Counties, Taiwan.

An aftershock of M 4.6 was reported felt with intensity III in Yilan and Taipei; II in Taoyuan and I in Hualien, Keelung, Hsinchu, Nantou, Miaoli and Taichung Counties, Taiwan.

O: 8AUG2019 06:42:45 36.5N 70.8E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN

O: 8AUG2019 00:45:26 36.6N 70.2E Mw=5.8 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 1AUG2019 117785 36.0N 72.0E 3.8-5.2 CABAA Hindu Kush/Pakistan

P: 9AUG2019 117785 38.0N 73.0E 3.8-5.1 ABBAA Hindu Kush/Pakistan

INDONESIA AND PHILIPPINES

O: 7AUG2019 18:15:24 0.1S 123.9E ML=4.2 EMSC SULAWESI, INDONESIA

P: 6AUG2019 117733 2.0S 123.0E 4.0-5.3 ABAAA Sulawesi area

O: 7AUG2019 18:31:27 2.0S 139.0E ML=4.3 EMSC EAR N COAST OF PAPUA, INDONESI

P: 6AUG2019 117728 2.0S 140.0E 4.0-5.3 AAAAA Papua New Guinea

O: 8AUG2019 06:07:51 3.9N 126.5E ML=4.3 EMSC KEPULAUAN TALAUD, INDONESIA

P: 2AUG2019 117714 3.0N 127.0E 4.0-5.3 CAAAA Halmahera

O: 7AUG2019 15:53:08 5.7S 102.9E ML=4.0 EMSC SOUTHERN SUMATRA, INDONESIA

P: 8AUG2019 117731 6.0S 102.0E 4.0-5.5 AAAAA So. of Sumatera

O: 7AUG2019 19:53:26 6.0N 125.9E mb=4.5 EMSC MINDANAO, PHILIPPINES

O: 7AUG2019 09:25:20 6.0N 126.2E ML=4.6 EMSC MINDANAO, PHILIPPINES

P: 9AUG2019 117711 8.0N 125.0E 4.0-5.3 ABAAA Central Philippines

O: 7AUG2019 20:27:29 7.8S 104.3E ML=4.7 EMSC SOUTHWEST OF SUMATRA, INDONESI

P: 5AUG2019 117730 6.0S 105.0E 4.0-5.3 ABAAA So. of Java

O: 7AUG2019 19:22:10 8.2S 105.1E ML=4.1 EMSC SOUTH OF JAVA, INDONESIA

P: 5AUG2019 117730 6.0S 105.0E 4.0-5.3 ACAAA So. of Java

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 7AUG2019 07:40:00 8.9S 79.4W ML=4.2 EMSC NEAR COAST OF NORTHERN PERU

P: 4AUG2019 117726 9.0S 80.0W 4.0-5.4 BAAAA No. Peru

O: 8AUG2019 04:39:22 14.9S 76.1W Mw=4.9 EMSC NEAR COAST OF CENTRAL PERU

P: 11AUG2019 117893 15.0S 76.0W 4.0-5.3 BAAAA Central Peru

O: 7AUG2019 23:40:41 18.1N 70.8W ML=3.1 EMSC DOMINICAN REPUBLIC REGION

O: 7AUG2019 18:26:56 18.6N 71.7W ML=3.1 EMSC DOMINICAN REPUBLIC

O: 7AUG2019 20:19:11 19.9N 70.4W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

O: 7AUG2019 21:13:20 19.9N 70.4W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

O: 7AUG2019 16:02:22 19.9N 70.5W ML=3.1 EMSC DOMINICAN REPUBLIC REGION

O: 7AUG2019 18:48:55 19.9N 70.5W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 AAAAA Puerto Rico

O: 8AUG2019 06:37:38 30.3S 71.2W ML=4.0 EMSC COQUIMBO, CHILE

P: 5AUG2019 117906 29.0S 70.0W 4.0-5.4 BBAAA Coast Central Chile

P: 5AUG2019 117916 31.0S 69.0W 4.0-5.4 BABAA Central Chile

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 7AUG2019 14:46:39 45.5N 26.5E ML=3.9 EMSC ROMANIA

P: 5AUG2019 117849 46.0N 26.0E 3.0-4.8 AAAAA Romania/NW Turkey

O: 8AUG2019 05:36:35 45.7N 11.1E ML=3.7 EMSC NORTHERN ITALY

P: 9AUG2019 117829 44.0N 11.0E 3.0-4.8 ABAAA Italy

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 8AUG2019 03:38:04 24.0S 179.6W mb=4.9 EMSC SOUTH OF FIJI ISLANDS

P: 9AUG2019 117913 27.0S 176.0W 4.0-5.3 ACCAA Tonga Islands

O: 7AUG2019 07:06:40 25.3S 179.9E mb=4.8 EMSC SOUTH OF FIJI ISLANDS

P: 30JUL2019 117695 25.0S 179.0E 4.0-5.3 CAAAA Tonga/Fiji

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 7AUG2019 12:26:49 35.0S 108.1W mb=5.0 EMSC SOUTHERN EAST PACIFIC RISE

O: 7AUG2019 07:11:09 41.0S 90.4W mb=4.6 EMSC SOUTHEAST OF EASTER ISLAND

P: 3AUG2019 117919 36.0S 97.0W 4.0-5.5 BBCAA Chile Rise

ZEALANDIA AND AUSTRALIA REGION

O: 8AUG2019 01:03:15 18.6S 120.5E ML=3.6 EMSC WESTERN AUSTRALIA

P: 6AUG2019 117915 19.0S 120.0E 2.0-3.3 AAAAA Central Australia

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 7AUG2019 12:10:44 37.3N 141.2E mb=4.5 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 7AUG2019 117798 36.0N 142.0E 4.0-5.3 ABAAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 7AUG2019 20:13:02 31.0N 115.3W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

P: 5AUG2019 117803 32.0N 116.3W 2.5-4.3 AAAAA So. California

O: 8AUG2019 05:08:06 35.6N 120.3W Md=2.3 EMSC CENTRAL CALIFORNIA

P: 10AUG2019 117776 36.1N 120.1W 2.5-4.3 AAAAA Central California

O: 7AUG2019 10:30:07 32.9N 115.5W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 7AUG2019 117805 32.9N 115.6W 2.5-4.3 AAAAA So. California

O: 8AUG2019 02:36:10 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117779 38.8N 122.8W 2.5-4.3 AAAAA Central California

O: 7AUG2019 20:19:21 36.0N 115.1W ml=2.2 EMSC NEVADA

O: 7AUG2019 20:46:21 36.1N 114.6W ML=2.2 EMSC ARIZONA

P: 7AUG2019 117774 38.7N 114.5W 2.5-4.3 ACAAA California/Nevada area

O: 08AUG2019 05:22:47 36.0N 117.4W Ml=2.9 EMSC CENTRAL CALIFORNIA

O: 08AUG2019 01:11:05 35.7N 117.5W ML=2.7 EMSC SOUTHERN CALIFORNIA

O: 07AUG2019 22:16:39 35.7N 117.6W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 07AUG2019 18:38:32 35.9N 117.4W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 7AUG2019 16:39:26 35.8N 117.6W Ml=2.6 EMSC CENTRAL CALIFORNIA

P: 4AUG2019 117772 35.7N 117.5W 2.5-4.4 BAAAA California/Nevada area

ALASKA

O: 8AUG2019 02:50:31 60.4N 149.4W ml=3.3 EMSC KENAI PENINSULA, ALASKA

P: 7AUG2019 117876 60.1N 148.4W 3.2-5.1 AAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

No earthquakes of M>=2 were located in the Rocky Mountain region today.

EASTERN U.S./CANADA

O: 7AUG2019 03:13:09 47.5N 70.1W MB=1.0 ECAN Charlevoix Seismic Zone

P: 6AUG2019 117836 47.3N 70.5W 2.0-3.8 AAAAA New England

O: 6AUG2019 22:40:03 59.7N 76.4W MB=3.0 ECAN Puvirnituq, QC

P: 5AUG2019 117869 59.0N 76.0W 2.0-3.9 AAAAA Quebec, Canada

O: 6AUG2019 17:44:32 47.2N 66.3W MB=1.6 ECAN Bathurst, NB

P: 10AUG2019 117833 49.3N 67.5W 2.0-3.8 BCAAA Maine

O: 6AUG2019 13:23:25 59.9N 57.5W MB=3.2 ECAN Nutak, NL

P: 11AUG2019 117874 61.0N 58.0W 2.5-3.8 BBAAA Baffin/Davis Strait Canada

O: 07AUG2019 12:47:38 35.1N 95.4W ML=2.2 EMSC OKLAHOMA

O: 07AUG2019 17:32:37 35.1N 95.4W mb=2.2 EMSC OKLAHOMA

O: 8AUG2019 03:14:38 35.1N 95.3W ML=2.5 EMSC OKLAHOMA

P: 9AUG2019 117813 36.0N 97.0W 2.0-3.8 AABAA Southern Plains

O: 08AUG2019 01:12:51 35.8N 98.1W ML=2.5 EMSC OKLAHOMA

O: 07AUG2019 23:38:24 35.8N 98.1W mb=3.3 EMSC OKLAHOMA

O: 8AUG2019 02:09:32 35.9N 98.0W ML=2.0 EMSC OKLAHOMA

P: 5AUG2019 117814 36.0N 98.0W 2.0-3.8 BAAAA Southern Plains

NEIC reported this earthquake of M 3.5 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Kingfisher, Yukon, Edmond, and Oklahoma City.

HAWAII

No earthquakes of M>=3 were located in Hawaii.

MODERATELY STRONG QUAKES SHAKE VANUATU

EARTHQUAKE SUMMARY FOR AUGUST 6, 2019

The strongest earthquakes of the day occurred in Vanuatu with M 5.8 and 5.9. The M 5.9 was reported by NEIC to have been felt with intensity III in Vila Shefa, Vanuatu. The stronger of these occurred near local solar noon, a time when geomagnetic effects can be strong. The last earthquakes of M>=5.8 in central Vanuatu occurred with M 6.6 on July 31, 2019; an M 6.0 on July 1, 2019 and an M 6.3 on March 20, 2019 all near the northerly of today's events. The last such quake of M>=5.9 within about 100 km of the southern event today was an M 6.0 on January 18,, 2019 and an M 6.1 on June 21, 2018.

Forecasts 117903 and 117904 had expected today's activity within about 150 km of these epicenter was likely around August 5-10. These events are at 102-104 degrees from the M 6.8 in Central Chile of August 1 and were probably promoted by concentrated surface energy from that event.

O: 7AUG2019 05:32:41 15.5S 167.7E Mw=5.8 EMSC VANUATU

P: 10AUG2019 117903 14.0S 167.0E 4.0-5.3 BBAAA Vanuatu Islands

O: 6AUG2019 22:14:14 17.9S 168.6E Mw=5.9 EMSC VANUATU

P: 5AUG2019 117904 19.0S 170.0E 4.0-5.4 ABAAA Vanuatu Islands

The activity in Vanuatu is typical of geomagnetic-promoted seismicity. The current geomagnetic storm continued today. This summary had expected seismic activity related to this storm in previous issues as:

Seismicity also continued today in the area of Lake Edward, Uganda. This region has been active with moderate quakes over the past two days and may be related to the geomagnetic storm which often activates the area of the East Africa Rift. Forecast 117508 had expected today's event in late July or early August.

NEIC reported this earthquake of M 4.6 in Uganda was felt with intensity IV in the area(s) of Uganda at Katwe, Mbarara, Kigorobya and II-III in Kasese, Fort Portal, Kajansi, Kampala, Kireka and Jinja, Uganda.

O: 6AUG2019 16:58:29 0.0S 30.1E mb=4.6 EMSC LAKE EDWARD REGION, UGANDA

P: 31JUL2019 117508 2.0S 29.0E 3.0-4.3 CBAAA Lake Victoria area

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 6AUG2019 17:40:45 47.8N 143.7E mb=4.8 EMSC SAKHALIN, RUSSIA

P: 6AUG2019 117850 47.0N 146.0E 3.5-5.4 AABAA So. Kurils

O: 6AUG2019 21:54:03 55.0N 164.5E mb=4.1 EMSC KOMANDORSKIYE OSTROVA REGION

P: 4AUG2019 117864 56.0N 166.0E 4.0-5.5 AAAAA Komandorsky Isl

INDONESIA AND PHILIPPINES

O: 6AUG2019 14:39:36 0.5S 127.8E mb=4.5 EMSC HALMAHERA, INDONESIA

O: 6AUG2019 12:06:25 0.6S 127.6E ML=4.5 EMSC HALMAHERA, INDONESIA

O: 6AUG2019 18:52:53 0.6S 127.7E mb=4.6 EMSC HALMAHERA, INDONESIA

P: 4AUG2019 117714 0.0N 128.0E 4.0-5.3 AAAAA Halmahera

O: 6AUG2019 23:39:32 3.3S 131.1E ML=4.5 EMSC CERAM SEA, INDONESIA

P: 9AUG2019 117728 3.0S 133.0E 4.0-5.3 BABAA Papua New Guinea

O: 7AUG2019 05:11:13 5.1N 123.9E mb=4.6 EMSC CELEBES SEA

P: 6AUG2019 117715 5.0N 124.0E 4.0-5.3 AAAAA Mindanao, Philippines

O: 6AUG2019 11:13:43 13.6N 120.8E mb=4.6 EMSC MINDORO, PHILIPPINES

P: 8AUG2019 117743 12.0N 121.0E 3.5-4.9 ABAAA Luzon, Philippines

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 7AUG2019 04:12:24 4.0N 78.7W mb=4.6 EMSC SOUTH OF PANAMA

P: 6AUG2019 117713 5.0N 83.0W 3.5-4.8 AACAA Costa Rica

O: 6AUG2019 21:14:10 10.4N 84.3W mb=4.8 EMSC COSTA RICA

P: 5AUG2019 117713 9.0N 84.0W 3.5-4.9 ABAAA Costa Rica

NEIC reported this earthquake of M 4.8 in Costa Rica was felt with intensity V in Carrillos Alajuela and IV in Atenas, Costa Rica and II-III in the area(s) of Costa Rica in Alajuela and Heredia.

O: 7AUG2019 01:19:11 12.2N 87.9W mb=4.4 EMSC NEAR COAST OF NICARAGUA

P: 7AUG2019 117746 13.0N 88.0W 3.5-5.0 AAAAA Nicaragua

O: 7AUG2019 01:49:07 14.5N 92.7W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO

O: 6AUG2019 13:12:53 15.8N 93.9W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 8AUG2019 117740 14.0N 92.0W 3.5-5.1 AAAAA Guatemala

O: 6AUG2019 23:51:27 17.5N 94.8W ML=4.2 EMSC VERACRUZ, MEXICO

P: 29JUL2019 117523 17.0N 94.0W 3.5-5.0 CAAAA Chiapas, Mexico

O: 6AUG2019 16:11:14 18.1N 103.3W ML=4.0 EMSC OFFSHORE MICHOACAN, MEXICO

P: 10AUG2019 117744 18.0N 103.0W 3.5-5.0 BAAAA Michoacan, Mexico

O: 6AUG2019 13:27:03 18.4N 66.1W ML=3.0 EMSC SAN JUAN URBAN AREA, PUERTO RI

P: 6AUG2019 117751 19.0N 66.0W 3.4-4.8 AAAAA Puerto Rico

O: 6AUG2019 07:57:36 19.1N 64.6W Md=3.4 EMSC VIRGIN ISLANDS REGION

P: 6AUG2019 117750 18.0N 65.0W 3.4-4.9 ABAAA Puerto Rico

O: 6AUG2019 22:36:38 19.1N 69.5W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 AABAA Puerto Rico

O: 6AUG2019 23:46:08 19.6N 74.2W ML=3.8 EMSC CUBA REGION

P: 5AUG2019 117752 19.0N 71.0W 3.4-4.8 AACAA Puerto Rico

O: 6AUG2019 17:15:06 19.7N 68.1W ML=3.4 EMSC DOMINICAN REPUBLIC REGION

O: 6AUG2019 11:20:27 19.7N 68.5W ML=3.5 EMSC DOMINICAN REPUBLIC REGION

P: 8AUG2019 117752 18.0N 69.0W 3.4-4.9 ABAAA Puerto Rico

O: 7AUG2019 06:16:35 20.7S 66.9W mb=4.1 EMSC POTOSI, BOLIVIA

P: 4AUG2019 117907 21.0S 69.0W 4.0-5.3 BABAA Coast No. Chile

O: 6AUG2019 18:26:41 27.4N 111.3W ML=3.7 EMSC GULF OF CALIFORNIA

P: 3AUG2019 117757 28.0N 112.0W 3.5-4.9 BAAAA Gulf of California

AFRICA AND EUROPE

O: 6AUG2019 16:58:29 0.0S 30.1E mb=4.6 EMSC LAKE EDWARD REGION, UGANDA

P: 31JUL2019 117508 2.0S 29.0E 3.0-4.3 CBAAA Lake Victoria area

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 7AUG2019 05:32:41 15.5S 167.7E Mw=5.8 EMSC VANUATU

P: 10AUG2019 117903 14.0S 167.0E 4.0-5.3 BBAAA Vanuatu Islands

O: 6AUG2019 22:14:14 17.9S 168.6E Mw=5.9 EMSC VANUATU

P: 5AUG2019 117904 19.0S 170.0E 4.0-5.4 ABAAA Vanuatu Islands

O: 6AUG2019 14:10:42 18.1S 175.1W mb=4.2 EMSC TONGA

P: 11AUG2019 117901 19.0S 174.0W 4.0-5.3 BAAAA Tonga Islands

OCEAN RIDGES

O: 7AUG2019 04:02:15 6.1S 107.0W mb=4.5 EMSC CENTRAL EAST PACIFIC RISE

O: 6AUG2019 17:20:56 6.2S 107.3W mb=4.9 EMSC CENTRAL EAST PACIFIC RISE

P: 7AUG2019 117725 4.0S 104.0W 4.0-5.4 ACCAA No. East Pacific Rise

ZEALANDIA AND AUSTRALIA REGION

O: 6AUG2019 16:00:12 19.7S 133.9E ML=2.7 EMSC NORTHERN TERRITORY, AUSTRALIA

P: 3AUG2019 117915 19.0S 133.0E 2.0-3.3 CAAAA Central Australia

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

No earthquakes of M>=4 were located in Japan or the Kuril Islands today.

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 07AUG2019 03:10:15 35.9N 117.7W Ml=2.6 EMSC CENTRAL CALIFORNIA

O: 07AUG2019 01:41:45 35.6N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

O: 06AUG2019 21:32:22 35.6N 117.4W Ml=2.6 EMSC SOUTHERN CALIFORNIA

O: 06AUG2019 19:47:07 35.8N 117.6W ML=3.1 EMSC CENTRAL CALIFORNIA

O: 06AUG2019 17:33:32 35.7N 117.5W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 06AUG2019 10:42:12 35.6N 117.4W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 7AUG2019 04:51:39 35.7N 117.5W Ml=3.2 EMSC SOUTHERN CALIFORNIA

P: 4AUG2019 117772 35.7N 117.5W 2.5-4.4 BAAAA California/Nevada area

O: 6AUG2019 21:15:41 35.5N 115.5W ml=2.3 EMSC SOUTHERN CALIFORNIA

P: 4AUG2019 117772 35.7N 117.5W 2.5-4.4 AABAA California/Nevada area

O: 7AUG2019 01:43:32 35.5N 120.8W Md=2.0 EMSC CENTRAL CALIFORNIA

O: 7AUG2019 01:27:36 35.5N 120.8W Md=2.6 EMSC CENTRAL CALIFORNIA

P: 6AUG2019 117776 36.2N 120.8W 2.5-4.3 AAAAA Central California

O: 7AUG2019 04:56:24 35.9N 120.7W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 6AUG2019 117776 36.2N 120.8W 2.5-4.3 AAAAA Central California

O: 6AUG2019 23:26:13 36.1N 121.4W Md=2.6 EMSC CENTRAL CALIFORNIA

P: 8AUG2019 117777 36.2N 121.8W 2.5-4.4 AAAAA Central California

NEIC reported this earthquake of M 2.6 in Central California was felt with intensity II-III in the area(s) of Templeton, Cayucos, Atascadero and Paso Robles, Central California.

O: 6AUG2019 22:59:57 38.8N 122.4W Md=2.6 EMSC NORTHERN CALIFORNIA

O: 6AUG2019 08:09:41 38.8N 122.8W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 8AUG2019 117779 38.8N 122.8W 2.5-4.3 AAAAA Central California

ALASKA

O: 7AUG2019 06:17:46 61.0N 148.2W ml=3.0 EMSC SOUTHERN ALASKA

P: 7AUG2019 117876 60.1N 148.4W 3.2-5.1 AAAAA Central Alaska

O: 7AUG2019 03:34:47 61.5N 150.0W ML=3.0 EMSC SOUTHERN ALASKA

P: 11AUG2019 117877 61.3N 150.9W 3.2-4.8 AAAAA Central Alaska

NEIC reported this earthquake of M 3.0 in Southern Alaska was felt with intensity II-III in the area(s) of Anchorage, Chugiak and Eagle River Souothern Alaska.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

No events of M>=2 were located in the northwestern U.S. or western Canada today.

ROCKY MOUNTAINS REGION

O: 6AUG2019 18:08:29 45.9N 111.4W ML=2.9 EMSC WESTERN MONTANA

P: 11AUG2019 117835 45.7N 112.1W 2.0-3.9 BAAAA Montana/Idaho

NEIC reported this earthquake of M 2.9 in Western Montana was felt with intensity II-III in the area(s) of Western Montana at Manhattan, Belgrade and Bozeman.

EASTERN U.S./CANADA

O: 6AUG2019 23:05:31 36.3N 97.5W mb=2.6 EMSC OKLAHOMA

O: 6AUG2019 15:45:18 35.8N 98.1W ML=2.4 EMSC OKLAHOMA

O: 6AUG2019 22:56:40 36.3N 97.5W mb=2.8 EMSC OKLAHOMA

P: 5AUG2019 117814 36.0N 98.0W 2.0-3.8 AAAAA Southern Plains

O: 5AUG2019 21:58:56 45.6N 66.2W MB=2.1 ECAN Hampton, NB

P: 9AUG2019 117832 44.0N 68.0W 2.0-3.9 BBBAA Maine

HAWAII

No earthquakes of M>=3 were located in Hawaii.

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