According to the U.S. Geological Survey, the first quake, a magnitude 3.1, struck at 4:11 p.m. and was followed by a M2.5 aftershock just four minutes ... earthquake activity in Southern ...

LOS ANGELES (KABC) -- A 3.6-magnitude earthquake struck off the coast of Southern California Sunday ... 4:11 p.m., and another 2.5-magnitude quake struck a few minutes later.

Southern California has experienced a series ... These forecasts are calculated for earthquakes of magnitude 5 or greater in the U.S. and its territories, using tools like seismographs and GPS ...