Some California cities have experienced minor earthquakes over the past few weeks.
On March 8, 2026, a 2.7-magnitude earthquake shook San Ramon at 1:19 p.m. PT, according to the U.S. Geological Survey (USGS). The epicenter was about 5 kilometers southeast of San Ramon at a depth of about 7.7 kilometers.
According to the USGS “Did You Feel It?” earthquake reporting system, 24 people submitted responses about experiencing the earthquake. The quake was categorized as CDI (Community Decimal Intensity) III, indicating weak shaking.
No major injuries or damage were reported due to the tremor.
On February 28, 2026, a 2.7-magnitude earthquake rattled Petrolia at 10:40 a.m. PT, according to USGS.
The epicenter was about 74 kilometers west-northwest of Petrolia at a depth of 10 kilometers.
There were no reports of citizens reporting the earthquake, according to the ‘Did You Feel It’ reporting system.
More Reports of Earthquakes
Earthquakes have been rattling parts of California over the past few days.
On the night of March 4, 2026, a 3.1-magnitude earthquake was recorded near The Geysers in northern California. The epicenter was located around 5 kilometers west northwest of The Geysers.
A similar low-magnitude earthquake shook San Ramon at 11:21 p.m. on March 1, 2026, followed by a series of smaller quakes. The epicenter of the 3.3-magnitude earthquake was just southwest of San Ramon, at a depth of 8.4 kilometers.
Additional quakes following this ranged from 2.8 to around 1.5 in the same region, all centered southeast of San Ramon.
The clusters of tremors are known as earthquake swarms, a series of small earthquakes occurring in the same area without a single, defined mainshock. These quakes can last minutes, hours, or days along a fault line.
The series of earthquakes near San Ramon on the night of March 1, 2026, were linked to the Calaveras Fault, which is part of the Bay Area’s fault system, according to USGS.
A swarm of earthquakes shook communities close to San Ramon early morning on February 2, 2026. Following a 4.2-magnitude earthquake, at least five earthquakes of magnitude 3 or higher were recorded across the Bay Area, with over 4,000 people submitting reports of experiencing the tremors on the ‘Did You Feel It’ reporting system.
Frequent Earthquakes in California
California frequently experiences earthquakes due to its location along the boundary of two major tectonic plates, the Pacific and the North American plates, which grind past each other.
This movement causes immense stress along the 650-mile-long San Andreas Fault and its surrounding areas. The fault line is the primary boundary and is supported by a network of other active faults.
While California experiences thousands of earthquakes every year, most of them are too weak to be felt.
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