Nevada is in the midst of a potential earthquake swarm.
USGS also reported 9 other magnitude 2.5+ quakes in the area on the same day.
This is the third consecutive week where the area has experienced a major earthquake. A week prior, on April 23, county officials reported a magnitude 4.7 quake.
On April 13, the area was hit by a magnitude 5.7 quake, with three significant aftershocks, of magnitudes 3.6, 2.8, and 3.0.
The weeks of quakes potentially represent an earthquake swarm. According to the USGS, an earthquake swarm is "a sequence of mostly small earthquakes with no identifiable mainshock." They are typically associated with geothermal activity. They typically recur at the same location, and while typically short-lived, they can last days, weeks, or months.Nearly 400 Earthquakes Recorded
According to the Tahoe Daily Tribune, the Nevada Seismological Laboratory at the University of Nevada, Reno, recorded a total of 371 quakes between April 13 and 22; 83 of them had a magnitude of 2.5 or greater.“This earthquake sequence is on a fault we didn’t know about before it started, crossing the Dead Camel Mountains,” Christie Rowe, director of the NSL, told the outlet. “We’ve had reports of minor damage in Fallon and at Fort Churchill to some of the historic buildings.”
The Nevada Seismological Lab deployed aftershock kits to the region that helped them track the quakes better, but there are thousands of fault lines in the state, and only the ones that have broken the surface are known.
“When a fault lies quiet for thousands of years, erosion can erase it from the landscape,” Rowe explained. “It lies hidden until the next earthquake.”
