Mammoth earthquake swarm is the largest in nearly a decade

More than 600 small earthquakes have rattled the Mammoth Lakes region in less than 36 hours as ripple effects continued across one of the most seismically active volcanic regions in California, according to the U.S. Geological Survey.

 

The swarm of quakes — ranging from magnitude 1.0 to 3.8 — began just before 5 a.m. Thursday, according to the USGS.

 

“This is one of the largest earthquake swarms we’ve seen in the past decade or so,” said David Shelly, a USGS research seismologist who has been studying the volcanic system near Mammoth Lakes. “We’ll be tracking it closely.”

 

Read More: Mammoth earthquake swarm is the largest in nearly a decade – LA Times.