M3.0 Earthquake 15 km S of Tres Pinos, CA — October 22, 2026
2026-10-22 21:58:44 UTC (50 min ago) · approx. 1:58 PM UTC-8 local
On October 22, 2026 at 21:58 UTC, a magnitude 3.0 shallow crustal earthquake struck 15 km S of Tres Pinos, CA, at a depth of 5.6 km and coordinates 36.6563°, -121.3015°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 529 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 74 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-121.3015°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Tres Pinos, CA?
The magnitude 3.0 earthquake that struck 15 km S of Tres Pinos, CA on October 22, 2026 at 21:58 UTC had a depth of 5.6 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: nc75453601). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 22, 2026). M3.0 Earthquake 15 km S of Tres Pinos, CA — October 22, 2026. Retrieved October 22, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75453601/