Magnitude 3.9 - SAN FRANCISCO BAY AREA, CALIFORNIA

Earthquake Details

• This event has been reviewed by a seismologist.

Magnitude	3.9
Date-Time	Thursday, October 20, 2011 at 21:41:04 UTC Thursday, October 20, 2011 at 02:41:04 PM at epicenter
Location	37.864°N, 122.249°W
Depth	9.8 km (6.1 miles)
Region	SAN FRANCISCO BAY AREA, CALIFORNIA
Distances	2 km (2 miles) ESE (112°) from Berkeley, CA 5 km (3 miles) NE (47°) from Emeryville, CA 5 km (3 miles) NNW (341°) from Piedmont, CA 8 km (5 miles) NNW (346°) from Oakland, CA
Location Uncertainty	horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles)
Parameters	Nph= 90, Dmin=2 km, Rmss=0.18 sec, Gp= 22°, M-type=regional moment magnitude (Mw), Version=5
Source	California Integrated Seismic Net: USGS Caltech CGS UCB UCSD UNR
Event ID	nc71667366

• Did you feel it? Report shaking and damage at your location. You can also view a map displaying accumulated data from your report and others.