East Bay Earthquake Swarm Continues

A 3.1-magnitude earthquake struck early this morning and was followed by two 2.9-magnitude temblors about one mile from San Ramon, according to U.S. Geological Survey officials. The quake struck at 1:46 a.m. and had a depth of 5.7 miles, USGS officials said. The quake was preceded by a smaller 2.7-magnitude earthquake, which struck Monday night at 10:57 p.m., less than a mile from San Ramon.

The four quakes are among hundreds of small quakes that have struck in and around the area in the past weeks. The quakes have been occurring along the Calaveras Fault, which intersects with the Hayward Fault, according to the USGS.

The biggest of the four quakes was felt as far away as Walnut Creek, Castro Valley, Moraga and Dublin.

See Also:

• Are You Really Ready for the Next Big California Earthquake?

The 2003 Working Group of California Earthquake Probability, which builds forecasts of earthquakes, said there is an 11 percent chance the Calaveras Fault will produce a 6.7-magnitude earthquake or larger in the next 30 years, according to the USGS.

Previous:

• Overnight Earthquakes Rattle San Ramon

On Aug. 24, 2014, a 6.1-magnitude earthquake in the North Bay killed one person, injured more than 200 others and caused millions of dollars in damage. A 4.0-magnitude quake that struck the Hayward fault in the East Bay in August rattled nerves, and elicited some unique responses that were captured on camera.

Additional quake coverage on Patch:

• WATCH: Local Weatherman Reacts To East Bay Earthquake While On Air
• Rude Awakening! Watch These Two Cute Dogs React To East Bay Earthquake
• NAPA QUAKE 2014: Click here for Patch’s Full Earthquake Coverage

Bay City News contributed to this report. Photo via Shutterstock.