The East Bay had a mild tremor on Tuesday morning due to an earthquake with a magnitude of 3.4, according to the U.S. Geological Survey.
The 6 mile-deep tremor was felt around 7:44 in the morning. Between Alamo and Walnut Creek, to the west of I-680, was where the epicenter lay.
According to the USGS, the East Bay experienced little shaking.
The quake struck on a fault deep under the earth’s crust known as Mount Diablo Thrust. “This fault may accommodate the transfer of slip from the Greenville Fault to the Concord Fault, and is thought to be responsible for the ongoing uplift of Mount Diablo,” the USGS said.
The USGS event page has more details on this earthquake.