These quakes are not on the dangerous Hayward fault; they are on the so called step-over fault that is between Calaveras and Concord, and all centered near Dublin.
The largest was 3.0 recorded at 6:30 pm on Thursday night.
This comes as a new report warns that the Bay Area is not ready for the big one coming on the Hayward fault.
Magnitude 3.0 - SAN FRANCISCO BAY AREA, CALIFORNIA
2008 March 21 01:37:24 UTC
Map Centered at 37°N, 120°W
Earthquake Details - Google location map link
|Depth||10.5 km (6.5 miles)|
|Region||SAN FRANCISCO BAY AREA, CALIFORNIA|
|Location Uncertainty||horizontal +/- 0.1 km (0.1 miles); depth +/- 0.3 km (0.2 miles)|
|Parameters||NST=127, Nph=127, Dmin=8 km, Rmss=0.13 sec, Gp= 32°,|
M-type=duration magnitude (Md), Version=1