A swarm of dozens of mostly small earthquakes in a sparsely populated area of northwestern Arizona has continued with the strongest quake recorded so far.
The Arizona Geological Survey says it anticipates small aftershocks following the magnitude 3.8 quake that occurred Thursday morning seven miles below a point on the Arizona side of the Arizona-Nevada line.
Authorities in Arizona's Mohave County and Nevada's Clark County said they had no reports of damage or injury.
The swarm began March 28 and Thursday's quake extended it to 55.
The U.S. Geological Survey put location at 19 miles south of Bunkerville, Nevada.
The swarm is occurring along two geologic regions' boundary.
Before Thursday, the swarm's largest quake was a magnitude 3.7 on April 17. However, most of the quakes have been much smaller.
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