I first suspected an earthquake might have been happening when I felt a tiny shaking while I was sitting at my desk.  Then some stronger shaking occurred and I looked at my Twitter stream.  All my friends in L.A. were tweeting “EARTHQUAKE.” It was good as confirmed.

Of course, it’s not really confirmed until a seismologist at USGS has reviewed the quake findings:

Magnitude 5.4 – SOUTHERN CALIFORNIA
Date-Time Wednesday, July 07, 2010 at 23:53:33 UTC
Wednesday, July 07, 2010 at 04:53:33 PM at epicenter

Location 33.417°N, 116.483°W
Depth 11.7 km (7.3 miles)
Region SOUTHERN CALIFORNIA
Distances 22 km (13 miles) NNW (332°) from Borrego Springs, CA
23 km (14 miles) SE (131°) from Anza, CA
33 km (20 miles) NE (52°) from Lake Henshaw, CA
41 km (25 miles) SW (215°) from Indio, CA
45 km (28 miles) S (174°) from Palm Springs, CA
94 km (58 miles) NE (41°) from San Diego, CA

Location Uncertainty horizontal +/- 0.3 km (0.2 miles); depth +/- 0.6 km (0.4 miles)
Parameters Nph=122, Dmin=10 km, Rmss=0.26 sec, Gp= 29°,
M-type=regional moment magnitude (Mw), Version=4

Don’t forget to fill out the “Did you feel it?” shake survey and check out the Shake Map!

Related posts:

1. The Only Quake I Like Is One with a BFG
2. 6.9 7.2 Earthquake in Baja California
3. Friday Bullets: Shake & Quake
4. More continuing quakes/aftershocks in Southern & Baja California
5. Quake Tweets!