Thursday, May 05, 2016

Biggest quake yet in NW Arizona swarm

A magnitude 3.8 earthquake struck at 06:49 a.m. this morning in the area of northwest Arizona that has seen a continuing swarm of over 55 earthquakes that started March 28. This is the largest event yet recorded in the swarm sequence, just surpassing the M=3.7 event of April 17.

There are reports of the tremor being felt in Arizona and Nevada. There are no reports of damage.

[Right, orange star marks epicenter of quake.  Red lines are known active faults. Credit, USGS]

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