IMPERIAL COUNTY, CA - A preliminary 2.1 magnitude quake struck near Brawley on Saturday afternoon, according to the U.S.

MEXICALI, B.C. - A preliminary 2.2 magnitude quake occurred close to Delta, B.C. on Sunday morning, according to the U.S.

NEVADA COUNTY, CA - A preliminary 3.5 magnitude quake jolted near Truckee at midday on Friday, the U.S. Geological Survey ...

The largest quake was reported at a 4.5-magnitude at around 7:40 p.m.

The seismic activity has ranged from very low magnitude up to 4.7 magnitude in strength, according to the USGS data.

Dozens of earthquakes rattled parts of California on Saturday and into Sunday in what experts call an earthquake swarm, with many centered near Brawley, according to the U.S. Geological Survey.

Southern California and southwest Arizona are on earthquake alert after a swarm shook Imperial County.

The swarm included a 4.7-magnitude quake.

Several earthquakes shook Southern California on Saturday evening, the largest being a magnitude 4.5 quake, according to the U.S. Geological Survey.

A 5.7-magnitude earthquake in Nevada sent tremors across parts of Northern California on Monday evening. The U.S. Geological Survey said the epicenter of the quake was about 12 miles southeast of ...