I was lying in bed this morning (after being up a while) and the bed started rocking. An earthquake! Wee!! It was really tiny, like 5 seconds total. It felt like someone was at the foot of the bed wiggling the frame a little.
Just now I just tried to wiggle the bed like the earthquake but the frame is too stiff. It was the building doing that wiggling! The motion was entirely horizontal, head-foot / east-west.
The US Geological Survey says this about the earthquake:
|Location||37.477 °N, 121.797 °W|
|Depth||9 km (5.6 miles)|
|Region||SAN FRANCISCO BAY AREA, CALIFORNIA|
|Location Uncertainty||horizontal +/- 0.1 km (0.1 miles); depth +/- 0.4 km (0.2 miles)|
|Parameters||Nph= 89, Dmin=3 km, Rmss=0.08 sec, Gp= 36 °,
M-type=regional moment magnitude (Mw), Version=6