Wednesday, July 31, 2019

Update on Recent Ridgecrest Area Earthquake Activity


  The pattern of aftershocks of the M7.1 Ridgecrest earthquake appears to be continuing. If one uses the standard deviation of the activity A to estimate error bounds on the daily number of earthquakes one gets a good fit to the data except for the time of the major earthquake.


The daily peak magnitudes continue to steadily decrease.


If the trend continues one would expect the number of earthquakes above M2.5 to range from about 3 to 11 and the peak magnitudes to range from about M2 to M4 over the next few days. But we are approaching similar stress index (SI) values to that of the time of the M7.1 earthquake and the same is true for a supermoon index (SMI) for the coincidence of lunar perigee and the alignment the Moon with the Sun over the next few days.



Anything above M4 would be unlikely based on the statistics from the series of aftershocks.

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