Earthquake This Morning

intensityI 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:

Magnitude 4.1
Location 37.477°N, 121.797°W
Depth 9 km (5.6 miles)
  • 10 km (6 miles) ENE (62°) from Milpitas, CA
  • 12 km (8 miles) NNE (12°) from Alum Rock, CA
  • 16 km (10 miles) SSE (150°) from Sunol, CA
  • 17 km (11 miles) NNE (29°) from San Jose City Hall, CA
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
Event ID nc71336726

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