USGS: Swarm of small earthquakes shake Mammoth Lakes area
A swarm of small earthquakes, including a 3.9 temblor and a 3.8 shaker, shook an area six miles east of Mammoth Thursday, Sept. 25, and continued into Friday at lesser magnitudes and frequency, according to authorities.
The quakes were triggered by gas and water moving deep within the earth’s crust and are not considered to be a sign of danger at this time, according to the U.S. Geological Survey. The strongest quake occurred Thursday evening at about 8:30 p.m. and registered at 3.9 on the Richter scale.
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