4.1 quake shakes Southern California LOS ANGELES, April 28 (UPI) -- A 4.1-magnitude earthquake shook Southern California early Saturday without causing any reported damage or injury, the U.S. Geological Survey said. The quake, which hit just after 8 a.m., measured 4.1 on the Richter scale, enough to cause noticeable shaking but unlikely to do any significant damage. The epicenter was in a mountainous area 7 miles west of Crestline. Residents of Los Angeles, 60 miles to the west, felt the quake, the Los Angeles Times reported. It was also felt in San Bernardino County and the San Gabriel Valley. Worldwide, there are about 13,000 quakes a year measuring between 4.0 and 4.9 on the Richter scale.