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Scientists say ShakeAlert warning system 'worked exactly as it should have'
The USGS says ShakeAlert detected a strong one. "Intensity level of shaking as high as intensity 8.0 were estimated by the ShakeAlert system," said Robert de Groot with USGS. ShakeAlert is ...
SFGate23d
Magnitude 4.7 earthquake shakes just north of the Bay Area
The USGS posted on ‘X’ that the New Year’s day shaker was the first time the ShakeAlert system had been activated in 2025.
Sacramento Bee24d
Small earthquake shakes Northern California on New Year’s Day. Where was it located?
A ShakeAlert was issued to cellphone users in portions of Lake, Sonoma, Napa and Mendocino counties, according to the USGS. Wednesday’s temblor was relatively small compared with December’s ...