Earth ChangesCalifornia rattled by rapid succession of earthquakes with shaking felt hundreds of miles from epicenter Posted on December 9, 2025 by Administrator California was shaken early Monday as a series of earthquakes struck in quick succession, raising concern in the seismically active region. At least seven tremors have been reported, ranging in magnitude from 1.1 to 4.1, with the epicenter near The Geysers. The larger 4.1 magnitude earthquake hit first, detected at 7.08am PT (10.08am ET), and the rest were likely aftershocks, according to the US Geological Survey (USGS).