Yesterday I posted a set of statistics for California seismicity
indicating that Southern California was due for an earthquake of
Ml>=3. An earthquake east of Los Angeles this morning occurred with Ml 3.9.
This is the largest earthquake in the southern California region since
February 11, 2001 (92 days). This year southern California has seen two
periods of activity at these magnitude levels or greater. The first
occurred on 14 January in the Los Angeles area when Ml 4.0 and 4.3
earthquakes occurred following the Mw 7.6 in El Salvador. The second
period was Feb. 10-11 when earthquakes of 3.9, 4.2 and 5.2 occurred
in the Twenty-nine Palms and Big Bear City areas respectively.

The earthquake this morning had the following preliminary parameters (SCSN):

14MAY2001 17:13:30 34.2N 117.4W ML=3.9 W of Devore, CA