LOS ANGELES – A magnitude 4.3 earthquake rumbled through Muscoy in San Bernardino County on Thursday morning, triggering shaking across the Inland Empire, Los Angeles and Orange counties, according to the U.S. Geological Survey.
The earthquake occurred at 9:32 a.m. at a depth of about 3.3 miles and was followed by a magnitude 3.1 aftershock about four minutes later in Rialto, according to USGS.
The Rialto Fire Department reported that a series of small earthquakes shook the northwestern portion of the city Thursday morning. The first foreshock in the region, a magnitude 3.0, struck about 8:34 a.m., followed by a magnitude 2.8 about eight minutes later. Two smaller temblors occurred over about 13 minutes before the magnitude 4.3 hit, according to USGS…