Upgraded 3.4-Magnitude Quake Jolts San Ramon Valley Awake
SAN RAMON (CBS SF) -- A 3.4-magnitude earthquake shook the San Ramon Valley Thursday morning -- the latest in a series of small quakes to rattle the region.
The shaker was first reported as a magnitude 3.2, but was later upgraded.
The quake struck at 6:10 a.m. and was centered 1 mile northeast of San Ramon and 3 miles southeast of Danville.
The USGS reported the temblor to have a depth of 5.8 miles.
Over 250 people reported feeling some shaking in the area.
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Contra Costa Fire and San Ramon Valley Fire dispatch tella KPIX 5 they have not received any calls regarding the quake.
RELATED: Weather Responsible For Swarm Of East Bay Earthquakes? Nope
The temblor follows several other small quakes in the same area in the last day, including a 2.6-magnitude quake at 3:55 p.m. and a 3.0 quake at 8:14 a.m.
The earthquakes are most likely a result of seismic activity on the Calaveras fault, according to the USGS.
COMPLETE QUAKE COVERAGE: CBS Earthquake Resource Center
This article will be updated as information warrants, and follow KPIX 5 on Twitter at @CBSSF or KCBS Radio on Twitter at @KCBSNews for updates on breaking news anytime.
DID YOU FEEL IT?: USGS Shake Map For Northern California
LIVE QUAKE MAP: Track Real-Time Hot Spots
BAY AREA FAULTS: Interactive Map Of Local Faults
Strong earthquakes with an epicenter off the coast can trigger tsunamis, depending on the size and type of the fault movement. The Pacific Tsunami Warning Center tracks earthquake data for the West Coast.
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