Richard ~ The Alaska Tsunami Warning Center has good information on quakes. http://www.earthquake.usgs.gov/
It looks like they recorded your earthquake was 4.6
There was a 6.7 on the Aleutian Islands the other day. But, since hardly anyone lives there, I imagine only the sea lions got a "thrill".
If you click on the link to your earthquake, it gives you more info.
Earthquake Details
Magnitude 4.6
Date-Time Thursday, August 9, 2007 at 07:58:49 (UTC)
= Coordinated Universal Time
Thursday, August 9, 2007 at 12:58:49 AM
= local time at epicenter
Location 34.300°N, 118.620°W
Depth 7.5 km (4.7 miles)
Region GREATER LOS ANGELES AREA, CALIFORNIA
Distances 5 km (3 miles) NNW (343°) from Chatsworth, CA
11 km (7 miles) ENE (74°) from Simi Valley, CA
11 km (7 miles) N (353°) from Canoga Park, CA
44 km (27 miles) NW (309°) from Los Angeles Civic Center, CA
At the bottom is a link to "Did your feel it?" It asks you questions like: How would you best describe the ground shaking?
How would you best describe your reaction?
How did you respond?
Hmmm, don't see any questions about whether it was your birthday. :p But, I guess that could be the answer to all of the above questions. :D
