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Real-time earthquake monitoring for San Ramon / Dublin / Pleasanton. Track seismic activity along the Calaveras Fault in Contra Costa / Alameda County.
150 earthquakes recorded in the last 30 days. The most recent was M1.4 on 2/5/2026.
I-680/I-580 corridor along the Calaveras Fault. This region is monitored by the USGS seismic network and experiences regular seismic activity due to the Calaveras Fault.
The Calaveras Fault is one of the major fault systems in the San Francisco Bay Area. Earthquakes in this region can range from minor tremors to significant events that may be felt across multiple counties.
The Calaveras Fault is part of the San Andreas Fault System, which is the primary boundary between the Pacific Plate and the North American Plate. Understanding earthquake activity along this fault is crucial for earthquake preparedness in Contra Costa / Alameda County and surrounding areas.