M3.4 earthquake hits Berkeley, East Bay

An earthquake awoke many Bay Area residents early Wednesday. Image: USGS

A magnitude 3.4 earthquake startled Berkeley and other East Bay residents early Wednesday morning.

Its epicenter was near Tunnel Road and State Route 24, according to the U.S. Geological Service.

The earthquake was recorded at 4:42 a.m., according to the USGS, with a depth of 7.3 miles.

BART reported a 20-minute delay during track inspection.


A number of reports came in on Twitter from those who felt the quake in Berkeley. Berkeleyside posted its initial report of the quake on Twitter at 4:43 a.m.

At first, the quake was reported to be magnitude 3.7, but that was downgraded after 5 a.m. following USGS review.

Berkeleyside may update this post as we gather more information.

By 5:22 a.m., the USGS had received nearly 4,000 reports from people who felt the quake.

Learn more about this earthquake on the USGS website.

The USGS says the first quake was followed by several other smaller earthquakes. Source: USGS

Update, 10:55 a.m. There appear to have been some small aftershocks around the time of the 4:42 a.m. quake, according to preliminary information on the USGS site: a magnitude 1.9 quake at 4:45 a.m. and a magnitude 2.1 quake at 4:48 a.m. A 1.1 magnitude quake was reported about four hours later. But those reports were listed as “automatic”: none have been reviewed or verified by USGS.