time was 11:42, four minutes after I posted 
4:09 UPDATE: 5.4 on the Richter scale, 2 miles SW of Chino Hills, 7 miles deep, 34 aftershocks (strongest was 3.6),
Only minor damage so far, including some to runways at Ontario and John Wayne airports.
Cal State Fullerton reports some broken windows and cracks in buildings.
In Los Angeles, 5 minor injuries reported; some people were stuck in elevators
A few minor injuries reported in Brea.

4:09 UPDATE: 5.4 on the Richter scale, 2 miles SW of Chino Hills, 7 miles deep, 34 aftershocks (strongest was 3.6),
Only minor damage so far, including some to runways at Ontario and John Wayne airports.
Cal State Fullerton reports some broken windows and cracks in buildings.
In Los Angeles, 5 minor injuries reported; some people were stuck in elevators
A few minor injuries reported in Brea.