WEATHER PHENOMENA

 

Some seismicity may be affected by weather due to wind, tidal surge and air pressure systems effects of  the continental mass compared with adjoining plate masses. During the tropical storm season in the Northern Hemisphere we keep an eye on tropical storms which may affect seismicity according to our models.  Currently the following tropical storms appear to have potential to affect seismicity in the coming week:

 

A tropical cyclone may be forming west of Peninsular India. This storm is currently located at 13N 71E and headed NNW with winds up to 27 kts. Landfall may enhance seismicity in the regions of Pakistan, Iran and Afghanistan and India.

 

TROPICAL DEPRESSION THREE 

 

----  -------  ----------  --------  -----  ------  -------  ---------------

TD    03E      2020-06-02  00:00 UT  19.6N   91.6W   25 kts  Yucatan                  

 

TD Amanda continued today in the area north of Guatemala with winds up to 35 kts. It is expected to track to the north perhaps reforming in the Caribbean Sea. While some enhanced activity in Guatemala is possible in the next several days, no major changes to seismicity in the region are anticipated with this storm at this time.

 

TIDAL EFFECTS ON SEISMICITY

 

 

June 1, 2020  is the tenth day after the beginning of the new lunar month.  Regions most likely to experience tidal triggering on this day (With associated magnitude ranges; the percent change in seismicity rate over background seismicity rate on this day of the lunar month; statistical z-value and significance level) are:

 

Region Magnitude range %change z-value Significance level

 

Alaska MB>=3.0 6 2.0 0.05

Greece MB>=4.0 8 2.0 0.05

Hawaii MB>=2.0 19 2.7 0.02

Kuriles MB>=4.0 22 1.9 0.05

Mammoth Lakes MB>=3.0 19 2.2 0.05

East Pacific Rise MB>=4.0 38 2.3 0.05

Hindu Kush MB>=4.0 20 2.9 0.01

 

Regions expected to experience reverse triggering (i.e. they are unlikely to experience a significant event at this period of the lunar cycle) are:

 

 

Region Magnitude range %change z-value Significance level

 

No Regions