Magnitude 3.1 Earthquake of SAN FRANCISCO BAY AREA, CALIFORNIA 2013 April 20

2013 April 20 00:30:39 UTC : SAN FRANCISCO BAY AREA, CALIFORNIA EARTHQUAKE

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Magnitude: 3.1

Date-Time: Saturday, April 20, 2013 at 00:30:39 UTC

Friday, April 19, 2013 at 05:30:39 PM at epicenter

Earthquake data:

Location : 37.460°N, 121.773°W

Depth : 8.2 km (5.1 miles)

Region : SAN FRANCISCO BAY AREA, CALIFORNIA

Distances:

a) 11 km (7 miles) ENE (75°) from Milpitas, CA

b) 11 km (7 miles) NNE (24°) from Alum Rock, CA

c) 17 km (11 miles) NE (39°) from San Jose City Hall, CA

Location Uncertainty: horizontal +/- 0.1 km (0.1 miles); depth +/- 0.3 km (0.2 miles)

Parameters: Nph=216, Dmin=9 km, Rmss=0.15 sec, Gp= 65°, M-type=local magnitude (ML), Version=6