fromMail Online
1 week agoEarthquake strikes California as warnings trigger panic for thousands
Thousands of Californians received earthquake warnings on Thursday after a 4.7-magnitude tremor shook Northern California. The US Geological Survey (USGS) issued a ShakeAlert after the quake struck at 4:49am PT (7:49am ET), about 70 miles offshore of Petrolia. ShakeAlert messages are triggered when seismic sensors detect a quake of magnitude 4.5 or higher expected to cause significant shaking. The epicenter was located 190 miles west of Chico, a city of about 121,000 residents, and 65 miles west-southwest of Fortuna, which has roughly 12,000 residents.
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