Overview
- The USGS confirmed a shallow magnitude 4.1 earthquake at 9:22 a.m. near the Geysers after an initial 3.9 estimate was revised.
- A magnitude 2.9 temblor followed at 9:23 a.m., and several smaller aftershocks were recorded afterward.
- Officials reported no immediate damage or injuries as monitoring continued.
- Shaking was reported across parts of the Bay Area, including San Francisco, Novato and Napa, according to USGS community responses.
- The epicenter was in Sonoma County’s Geysers region, a seismically active geothermal area that frequently registers shallow quakes.