Skip to main content
U.S. flag

An official website of the United States government

Map of the January-February 2026 San Ramon earthquake swarm, Bay area faults, and volcanic areas

By California Volcano Observatory
An oblique Google Earth map of the San Francisco Bay area, looking north from the Santa Cruz mountains. Major cities, active tectonic faults, and the location of the San Ramon earthquake swarm are highlighted. The Clear Lake Volcanic Field, Mount Shasta, and the Berkeley Hills volcanics are also annotated to show that the San Ramon earthquake swarm is not happening near any active volcanoes.
Original Thumbnail Medium

Detailed Description

This oblique Google Earth map shows the location of the 2026 San Ramon earthquake swarm, along with notable faults in the San Francisco Bay area and the nearest volcanic areas to the swarm. Google Earth image modified by J. Ball, USGS.

Sources/Usage

Public Domain.

Related

Earthquake swarms in California: What’s the difference between magmatic and tectonic? 

Earthquake swarms in California: What’s the difference between magmatic and tectonic? 

If you live in California, you've almost certainly felt an earthquake - maybe more than one. Maybe, as the residents of the Bay Area city of San Ramon...

Read Article

Related

Earthquake swarms in California: What’s the difference between magmatic and tectonic? 

Earthquake swarms in California: What’s the difference between magmatic and tectonic? 

If you live in California, you've almost certainly felt an earthquake - maybe more than one. Maybe, as the residents of the Bay Area city of San Ramon...

Read Article
Was this page helpful?