M2.3 Earthquake 0 km SSW of Concord, CA — March 13, 2025
2025-03-13 17:34:37 UTC (2025-03-13) · approx. 9:34 AM UTC-8 local
On March 13, 2025 at 17:34 UTC, a magnitude 2.3 shallow crustal earthquake struck 0 km SSW of Concord, CA, at a depth of 12.7 km and coordinates 37.9640°, -122.0163°.
Physical scale: An earthquake of magnitude 2.3 releases seismic energy equivalent to roughly 48.8 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 25 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-122.0163°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.3 earthquake near Concord, CA?
The magnitude 2.3 earthquake that struck 0 km SSW of Concord, CA on March 13, 2025 at 17:34 UTC had a depth of 12.7 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: nc75148181). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 13, 2025). M2.3 Earthquake 0 km SSW of Concord, CA — March 13, 2025. Retrieved March 19, 2025 from https://www.earthquaketracker.org/earthquakes/event/nc75148181/