A moderate earthquake with a preliminary magnitude of 5.3 has struck southeast Idaho, with shaking felt across the state lines in Wyoming and Utah, seismologists and residents say. It was preceded by a smaller earthquake. The strongest earthquake, which struck at 5:56 p.m. MT on Saturday, was

centered about 12 miles northeast of Georgetown, or 63 miles southeast of Pocatello. It struck at a depth of 6.2 miles, making it a shallow earthquake. The United States Geological Survey (USGS) put the preliminary magnitude of the earthquake at 5.3. It estimated that more than 3.4 million residents across the region could have felt light shaking from the earthquake. MORE