A 4.1 earthquake struck northern San Luis Obispo County on Tuesday morning, with local residents and businesses feeling the ...

An emergency alert warning people in the Bay Area that an estimated 5.7 magnitude earthquake was imminent lit up phones Wednesday morning, but the actual temblor turned out to be a magnitude 4.2. Dr.

Hours after a 4.2 earthquake rattled most of Southern California on Friday, the second such quake in a week's span, state officials are urging residents to be prepared in the event of a massive ...

Rime ice buildup on Mount Rainier's only analog seismic station has led to false reports of increased tremor activity, the Pacific Northwest Seismic Network said.