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Magnitude 6.0 Earthquake in California
Map view of the location of the M6.0 - 6km NW of American Canyon, California that occurred on August 24, 2014.

Location of the M6.0 – 6km NW of American Canyon, California that occurred on August 24, 2014.

A magnitude 6.0 earthquake struck in northern California on August 24, 2014 at 10:20:44 UTC. Visit the USGS event page to learn more about this earthquake. This event is being called the South Napa earthquake.

This is the largest earthquake in the Bay Area since the magnitude 6.9 Loma Prieta earthquake in 1989, almost 25 years ago.

The USGS and its partners are working to develop a prototype Earthquake Early Warning System for the West Coast of the United States called ShakeAlert. The system could provide seconds to minutes of warning before strong shaking. Imagine if doctors could stop procedures before an earthquake. Or if emergency responders had a few extra moments to act, trains could be slowed or stopped, airplane landings could be redirected, and people could move to safer locations. Learn more by visiting the USGS website on this project.

For an estimate of the earthquake’s impact, visit the USGS Prompt Assessment of Global Earthquakes for Response (PAGER) website.

If you felt this earthquake, report your experience on the “USGS Did You Feel It?” website for this event.

Read additional earthquake information for California.

Learn more about the USGS Earthquake Hazards Program.

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