Wednesday, January 15, 2014

Small quakes hit northwest Arizona

The northwest corner of Arizona was hit with four small earthquakes on Monday, January 13, ranging in magnitude from 1.0 to 2.8.  They follow a magnitude 3.4 event that occurred last Friday, January 10.   [Right, yellow dots are epicenters recorded over the past seven days.  The larger one south of Mesquite is the M=3.4 from January 10.  The other events in Arizona all occurred on January 13.  Credit, USGS]

The day started with a magnitude 1.0 at 1:15 a.m south of Colorado City. The others were further west, closer to the Nevada border, with a M=1.7 at 12:43 p.m., a M=2.8 at 5:06 p.m., and finishing the day with a M=1.9 just a few seconds before midnight.

There is no indication the events are linked.  This area of the state lies within the southern end of the Intermountain Seismic Belt.

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