The latest struck on Tuesday with a magnitude of 3.0.READ MORE: Cal Fire Confirms Estrada Fire Sparked by Controlled Burn, Holding at 150 Acres; Evacuations Ordered
The South Napa Earthquake struck on August 24, 2014 and measured 6.0. One person was killed and 200 hurt, while damage from the quake was estimated anywhere between $360 million and $1 billion.READ MORE: Car Fleeing CHP Causes AC Transit Bus to Plow Into Oakland Home
It was the strongest earthquake in the Bay Area since the 1989 Loma Prieta earthquake which had a 6.9 magnitude.
Officials say that small aftershocks are rarely felt, but they are common whenever a quake ruptures the ground.MORE NEWS: Marin County Judge Tentatively Rejects Cutting Inmate Crowding at San Quentin