Report: An 'earthquake swarm' is shaking up Idaho

Earthquakes are shaking Idaho.A 5.3-magnitude earthquake rattled towns in northern Utah and southern Idaho on Saturday night, starting at 5:56 p.m.The earthquake rocked Rexburg to Salt Lake City. A pair of aftershocks rocked the area, too, shaking at magnitudes of 3.1 and 3.2, the U.S. Geographical Survey explained.Some more aftershocks ran through the area until 6:44 p.m."A magnitude 5.3 is a decent-sized, moderate earthquake," said Jim Pechmann, seismologist at the University of Utah. "It's no