The Geysers, CA – Two minor earthquakes struck the Northern California geothermal region near The Geysers on Monday morning, according to preliminary data from the U.S. Geological Survey (USGS).
The first, a magnitude 3.9 quake, occurred at 7:08 a.m. local time (15:08 UTC) about 1 km north-northwest of The Geysers in Lake County. The quake struck at a shallow depth of roughly 2 kilometers.
Just over 30 seconds later, a second quake measuring magnitude 2.8 hit approximately 2 km southeast of the same location. That tremor originated about 3 kilometers deep, according to the California Integrated Seismic Network (CISN).
While both quakes were considered minor, the larger one may have been lightly felt across parts of Sonoma and Lake counties, near the San Francisco Bay Area’s northern edge. No damage or injuries have been reported as of Monday morning.
The Geysers area is known for frequent small earthquakes due to ongoing geothermal energy extraction and regional tectonic activity. Over the past few weeks, dozens of microquakes have been recorded within a 250-kilometer radius, consistent with typical seismic behavior in this area.
Residents can report shaking experiences directly to the USGS via the “Did You Feel It?” tool to help refine intensity maps.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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