Earthquake Swarm in NW Nevada!

There has been an earthquake swarm in northwest Nevada. There was also a swarm in this region last August. The largest magnitude EQ so far is a magnitude 4.6. Here is a magnitude 4.0 EQ that initiated my interest in posting about this swarm. These epicenters plot along the Warner Valley and Guano valley fault zones.

This map shows the recent EQs in orange, yellow, and white, in increasing age. The grey circles are part of the August 2014 swarm. The faults are from the USGS active fault and fold database.

Here is the extensional moment tensor for the magnitude 4.6 EQ:

Here is the extensional moment tensor for the magnitude 4.0 EQ:

Here is the shake map for the M 4.6 EQ:

Here is the shake map for the M 4.0 EQ:

Here is the USGS 2% probability of exceedance in 50 years map of peak ground acceleration. One can observe that this region of Nevada has a low probability of ground acceleration.

I will post more on this swarm later today. check back!

Category(s): College Redwoods, earthquake, education, geology, plate tectonics

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