Mammoth earthquake swarm is the largest in nearly a decade

by Joseph Saraceno

mammothMore 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. MORE