3.4 Earthquake Largest in Series of Small East Bay Temblors

A 3.4-magnitude earthquake, now the largest temblor in a recent swarm of small shakers around the East Bay, was recorded this morning near San Ramon, according to the U.S. Geological Survey. The earthquake, which was reported at 6:10 a.m., was first classified as having a 3.2-magnitude, but it has since been upgraded, USGS officials said.

People felt shaking as far north as Vallejo and as far south as Sunnyvale, according to the USGS.

Then between 9:30 and 10:30 a.m. today, there were five earthquakes of imperceptible magnitude that the USGS reported around San Ramon. Within the past week, the USGS has reported 45 total earthquakes in San Ramon or nearby.

Fifteen of those earthquakes were reported above a magnitude of 2.0. The swarm’s second-largest reported earthquake, after this morning’s temblor, was a 3.1-magnitude earthquake reported early Wednesday morning in San Ramon, according to the USGS.

Californians prepared for future earthquakes during the annual the Great California ShakeOut drill of 2015 on Thursday morning.

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:

• Morning Earthquake Jolts East Bay
• Earthquake No. 4 Rattles San Ramon, Danville
• WATCH: Local Weatherman Reacts To East Bay Earthquake While On Air
• Magnitude 4.0 Earthquake Strikes East Bay
• Rude Awakening! Watch These Two Cute Dogs React To East Bay Earthquake
• Are You Really Ready for the Next Big California Earthquake?
• NAPA QUAKE 2014: Click here for Patch’s Full Earthquake Coverage

By Bay City News and Autumn Johnson

Photo via Shutterstock