(KRON) -- A preliminary 2.8 magnitude earthquake struck in Orinda on Tuesday, according to the United States Geological Survey (USGS). The earthquake happened around 10:43 p.m. The depth of the earthquake is about 4 miles (or 6.9 kilometers). The epicenter is around the Siesta Valley Recreation Are a. Map: USGS This marks the second earthquake reported in the East Bay on Tuesday, according to USGS. Earlier in the afternoon, a 2.9 earthquake struck in Dublin. ...read more read less