San Francisco Bay Area rattled by series of earthquakes

San Ramon: A series of small earthquakes rattled the San Francisco Bay Area on Monday morning in an area that has had a lot of seismic activity in recent months.

The most powerful of Monday’s quakes was a magnitude 4.2 that struck shortly after 7 a.m. just south of San Ramon, according to the US Geological Survey.

At least a dozen other smaller quakes struck in the same area starting around 6:30 a.m. and continuing for more than an hour. There were no immediate reports of major damage. Bay Area Rapid Transit said delays could result from trains briefly running at reduced speeds during routine track safety inspections.

Shaking was felt more than 48 km away in San Francisco and across the East Bay cities of Oakland and Richmond. San Ramon has been shaken by multiple recent earthquakes. The Contra Costa County area recorded 87 quakes at magnitude 2 or above in Nov and Dec.