SAN FRANCISCO—The San Francisco Bay Area was subject to some unusual seismic activity over a weekend in which five earthquakes were recorded in San Francisco alone.
At 2:05 p.m. on May 3, a 2.5 magnitude quake rumbled the ground near Concord, a city suburb located approximately 30 miles northeast of Downtown San Francisco.
The weekend’s largest earthquake came just 10 minutes later, a 4.0 magnitude quake that originated in the same location and could be felt throughout most of the Bay Area.
Within the next 45 minutes, three earthquakes of magnitudes 2.7, 2.4, and 1.6 struck, tremors that were mostly felt by East Bay residents. All four quakes were detected about nine miles beneath the earth’s surface.
Sunday’s tremors in Northern California were not the only ones experienced in the quake-prone state. Just after 4 a.m. (PST), a 3.9 magnitude earthquake rolled through Los Angeles, waking many residents.
In spite of the considerable seismic activity throughout California, there were no injuries or structural damages reported.