Just experienced an earthquake here. Here is what USGS says:
Magnitude 4.6 near Yorba Linda, CA
Tuesday, September 3, 2002 at 0:08:51 AM (PDT)
http://earthquake.usgs.gov/eqinthenews/ci09818433/maps/map.gif
Waveform of this event:
http://earthquake.usgs.gov/eqinthenews/ci09818433/waveforms/9818433.gif