A series of small earthquakes possibly triggered by water pressure from hot springs in the area struck near the mountain resort town of Mammoth Lakes in California’s Eastern Sierra.
The Associated Press reported the U.S. Geological Survey as saying a magnitude 4.0 temblor occurred at 5:13 p.m. Sunday at a depth of 4.3 miles. It was centered about 16 miles southeast of the mountain resort town.
It was followed by several smaller quakes.
The area saw hundreds of small earthquakes last month that seismologists said may have been related to area hot springs.
USGS seismologist David Shelly said scientists don't believe the earthquake swarm is connected to any volcanic activity.
Shelly said the quakes may have been triggered as water pressure from area hot springs shifted through the ground surface, stressing tectonic plates.
Shelly said at least 109 of the earthquakes reported were magnitude 2.0 or greater and smaller quakes made up the bulk of the activity.
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