Earthquake Swarm hit in Northern California-Nevada

RIDGECREST, CALIFORNIA - JULY 04: A local resident inspects a fissure in the earth after a 6.4 magnitude earthquake struck the area on July 4, 2019 near Ridgecrest, California. The earthquake was the largest to strike Southern California in 20 years with the epicenter located in a remote area of the Mojave Desert. The temblor was felt by residents across much of Southern California. (Photo by Mario Tama/Getty Images)

An earthquake swarm jolted Central California and the Sierra Nevada foothills on Thursday afternoon. Residents felt the quakes in the San Joaquin and Sacramento valleys.

The 6.0 magnitude shaking started at 3:49 p.m PST. And seismologists named this the Antelope Valley earthquake centered near the Antelope Valley faultline.

There have been about twenty-four similar magnitude earthquakes in the area in the past 50 years. This one was the area’s strongest quake since a 6.1 quake hit in 1994.

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Seismologist, Dr. Lucy Jones, Author of The Big Ones tweeted about the event.

Earthquake Swarm aftershocks

The swarm of three dozen aftershocks followed. They varied in magnitude. They were measured at between 1.0 to 4.6 by the U.S. Geological Survey.

“It’s a region with known active faults,” USGS researcher Austin Elliott said, referring to the remote area on the backside of the Sierra. “This is a classic place geologists go to study.”