4.0 - regional moment magnitude (Mw)
Time Friday, September 5, 2008 at 9:00:15 PM (PDT)
Saturday, September 6, 2008 at 4:00:15 (UTC)
Distance from Alamo, CA - 3 km (2 miles) ENE (77 degrees)
Diablo, CA - 5 km (3 miles) NW (315 degrees
A light earthquake occurred at 9:00:15 PM (PDT) on Friday, Sep 5, 2008.
The magnitude 4.0 event occurred 3 km (2 miles) ENE of Alamo, CA.
The hypocentral depth is 16 km (10 miles).