Third Quake In Under A Week Strikes San Ramon

SAN RAMON, CA — A 2.5-magnitude earthquake hit San Ramon at 2:19 p.m. Sunday, according to the U.S. Geological Survey.

The quake struck just west of Alcosta Boulevard and just north of Montevideo Drive, and had a depth of 9.2 kilometers, according to USGS. Nearby residents reported that they did not feel it strongly on USGS's "Did You Feel It?" map. No injuries or damage were reported.

Sunday's quake marks the latest of hundreds that have struck San Ramon since November, including a 2.8 on March 23 and a 3.0 on March 24.

The city sits along the Calaveras Fault, and several micro-faults along the main fault result in swarms of quakes. When fluids like water or gas move through a complex web of cracks in tiny faults, this can trigger many dozens of small quakes in quick succession.

On Feb. 27, the city of San Ramon hosted a Q&A with local mayors, Supervisor Candace Andersen, SRVFPD Chief Jonas Aguiar, and UC Berkeley seismologist Dr. Angie Lux.

SEE ALSO:

• Quake Hits East Bay Tuesday Morning, Second In Under 24 Hours
• San Ramon To Host Earthquake Swarm Q&A With Seismologist, Fire Chief, Mayors
• San Ramon Details Earthquake Readiness Policies
• How Prepared Are You For An Earthquake? 10 Things You Need