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We've had 3 minor earthquakes in 4 days, all at the same spot here in the East Bay:
3.5 2006/12/23 09:21:15 37.862N 122.235W 9.8 4 km ( 2 mi) ESE of Berkeley, CA 3.7 2006/12/22 22:49:57 37.861N 122.237W 10.0 4 km ( 2 mi) ESE of Berkeley, CA 3.7 2006/12/20 19:12:28 37.860N 122.237W 9.0 4 km ( 2 mi) ESE of Berkeley, CA
Considering that we live at 37.82N 122.24W, that's really close! The USGS website says they were from 4 to 6 miles underground.
Each one felt like someone dropped something very big out on the street. Whooomp! Odd time of year for this sort of things. You'd expect clusters of minor quakes in October. Rarely in December.
The disturbing thing is that these quakes are all on the Hayward fault, which runs thru Berkeley and Oakland, and hasn't had a major quake in many decades. Something to be concerned about.
Actually, the coordinates of where we live is not precise. We live within the box
(37.820;122.240) (37.820;122.249)
(37.829;122.240) (37.829;122.249)
If you put 37.82N 122.24W into Google Earth, it will point you at 37.82000000N 122.2400000W, which is not where we live.
