A 4.1 magnitude earthquake was reported from San Francisco Bay area before sunrise Thursday morning. The quake hit the city at 5:07 a.m., with a depth of about 12 miles. The epicenter was 6.2 miles northwest of Pittsburg, 7.9 miles north of Concord, and 21.6 miles northeast of Berkeley.
Earthquake vibrations were felt widely across the Bay area and the Sacramento region, which informed the USGS shake map. About 3,000 people reported the earthquake vibrations to the USGS.
Many users tweeted that they felt the earthquake tremors.
The second report was issued by the citizen-seismograph network of RaspberryShake, which informed its magnitude of 4.1. The third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same extent.
Other towns near the epicenter where the quake might have been felt in low magnitude include San Francisco, located 32 miles from the epicenter, and Sacramento, 44 miles away.