Skip to main content

LATEST UPDATES: Tracking COVID-19 | Racial Justice | KPBS Voter Guide

Earthquake Swarm In Imperial County Felt In San Diego, Tijuana

A map of a magnitude 4.9 quake northeast of Westmorland, near El Centro, on S...

Credit: U.S. Geological Survey

Above: A map of a magnitude 4.9 quake northeast of Westmorland, near El Centro, on Sept. 30, 2020.

A swarm of earthquakes struck in the Imperial Valley on Wednesday afternoon, according to the U.S. Geological Survey (USGS).

The quakes started around 4:45 p.m. northeast of Westmorland near Brawley, with the largest quake, a 4.9 magnitude, occurring at 5:51 p.m., the USGS said.

That quake was felt as far as Oceanside and Tijuana, according to the USGS.

The quakes have, so far, ranged from magnitude 2.5 to 4.9.

An earthquake swarm is common in this area, said Lucy Jones, a retired USGS seismologist. They are happening in the Brawley Seismic Zone, a network of small faults connecting the San Andreas and Imperial faults.

They are too far away from the San Andreas to change the probability of a quake on it, she tweeted.


San Diego News Matters podcast branding

KPBS' daily news podcast covering local politics, education, health, environment, the border and more. New episodes are ready weekday mornings so you can listen on your morning commute.

  • Need help keeping up with the news that matters most? Get the day's top news — ranging from local to international — straight to your inbox each weekday morning.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Want more KPBS news?
Find us on Twitter and Facebook, or sign up for our newsletters.

To view PDF documents, Download Acrobat Reader.