Category Archives: California Earthquakes

Did you feel that? 4.2 Mag Quake Jolts East Bay

A 4.2 magnitude earthquake rattled some awake at 2:41AM. The small quake was centered east of Union City. Check out the shake map.

The USGS has since downgraded the trembler from 4.2 to 4.0 magnitude.

5.7 magnitude earthquake hits near American Canyon

5.7 mag earthquake hits the Bay Area and Silicon Valley

A 5.7 or 6.0 magnitude earthquake rattles American Canyon and Napa Valley at 3:20 am on Sunday morning.

Some wine bottles must have been shakin’ up in Napa. Down here in Silicon Valley we just felt some mild shaking, but nothing fell down and shattered. Yet. Internet and power still running fine down here. Until The Big One.

Hope everyone is OK up in Napa County and the vicinity. Reports of several thousand power outages and broken glass up in Napa. Highway 37 is damaged in Santa Rosa and some brick buildings in Napa are destroyed. Highway 121 in Sonoma is currently shutdown due to possible pavement buckling from the quake. Gas leaks are being reported as well as fires in the Napa area. Shops in Vallejo are cleaning up broken glass and damaged brick walls. Looks like the #NapaQuake is the biggest we’ve had in the Bay Area in quite a while. Actually this is the largest quake to hit the Bay Area since the 1989 Loma Prieta quake. Stay safe and don’t touch anything sparking.

Now USGS is showing the Napa Quake as a 6.1 magnitude quake and with a quake of this magnitude aftershocks are expected. Maybe in hours or maybe over weeks. We just don’t have the quake prediction capability as of yet.

Safeway in American Canyon is bleeding wine after the strong earthquake.

photo tweeted by Anindya Chaudhuri

And the Napa Hall of Justice has been damaged in the quake.

photo tweeted by Jessette Porter ‏@racrmom


5.1 Magnitude Earthquake Shakes Southern California

A 5.1 magnitude earthquake shook the La Habra area of Southern California tonight and was felt around the LA region. Nope we didn’t feel a thing up here in Silicon Valley. Not a thing, At least not yet. These recent earthquakes could indicate that the San Andreas fault and the Pacific Plate are becoming active again.

No successful Silicon Valley startup has as of yet come up with a way to really predict earthquakes.

Guess we’ll see…

Here’s the shakemap from the USGS: