A powerful 7.1 earthquake shook Southern California one day after a magnitude 6.4. ... "Like any quake, today's M7.1 has a 1 in 20 of being followed by something even bigger.

A lightly populated stretch of Alaska’s southern coast was under a tsunami warning after the magnitude 7.3 quake was felt ...

A worldwide Android smartphone-based earthquake detection and early warning system can detect seismic activity in real time.

A 4.3-magnitude earthquake jolted a lake shoreline Friday, July 11, in Southern California, the U.S. Geological Survey reported. Then dozens of smaller quakes followed. The 6.5-mile-deep quake hit ...

A minor, 3.7-magnitude earthquake struck in Southern California on Thursday. It was followed by a larger, 4.3-magnitude quake nearby a few hours later, according to the United States Geological Survey ...

Forty-five quakes of magnitude 3.0 have struck Southern California on Wednesday, the largest of which was a magnitude 4.9.

RIDGECREST, Calif. -- Thousands of earthquakes have been recorded in Southern California since Thursday's initial 6.4 magnitude temblor, according to seismologist Dr. Lucy Jones. She says more ...