A preliminary report by the U.S. Geographical Survey (USGS) indicated that a 4.3 magnitude earthquake struck this morning at 5:54 a.m., centered in the Fontana, CA area. Preliminary Earthquake Report: Magnitude 4.3…

Santa Ana residents were startled by a 3.5 magnitude earthquake at 2:56 am today, September 15, which was based eight miles away, in the San Joaquin Hills (near UCI), according…