Geomagnetic effects

GEOMAGNETIC/SOLAR FIELDS

The geomagnetic field was at minor storm conditions today. The AP level was 21. High latitude geomagnetic field also saw stormy conditions with AP at 40. This continues the strongest geomagnetic storm since AP reached 51 on May 28 with high latitude AP of 84. With the new moon, this storm could activate a number of moderate to strong earthquakes. These would most likely occur near the geomagnetic equator expanding outwards over the next five days to 10-15 degrees from the equator. Some increases in event magnitude at high latitudes is also expected through August 24. The M 6.4 in the Fiji today occurred at the height of this storm on the geomagnetic equator and was probably promoted by it.

The geomagnetic field is expected to see active conditions August 19-21. Solar activity is expected to be at low conditions August 19-21 with a chance (10%) of an M-class flare and a 1% chance of an X-Class solar flare. A proton storm is expected with probability 5%.

SOLAR FLARE ACTIVITY

Flare # START MAX END CLASS DATE Flux (Jm-2)

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2640 0042 0059 0107 B1.8 (August 18, 2017) 2.1E-04

2650 0230 0237 0246 B2.4 (August 18, 2017) 1.9E-04

2670 0538 0544 0548 B2.2 (August 18, 2017) 9.4E-05

2680 0849 0852 0854 B9.5 (August 18, 2017) 1.1E-04

2720 1256 1300 1304 B3.0 (August 18, 2017) 9.8E-05

2730 1344 1351 1402 B8.1 (August 18, 2017) 6.0E-04

2760 1949 2002 2033 C4.4 (August 18, 2017) 8.4E-03

2770 2101 2104 2110 C2.9 (August 18, 2017) 9.4E-04

APRIL 2017