M3.2 Earthquake 49 km W of Petrolia, CA — August 17, 2026
2026-08-17 22:13:10 UTC (35 min ago) · approx. 2:13 PM UTC-8 local
On August 17, 2026 at 22:13 UTC, a magnitude 3.2 shallow crustal earthquake struck 49 km W of Petrolia, CA, at a depth of 14.7 km and coordinates 40.3350°, -124.8572°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 858 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 93 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-124.8572°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Petrolia, CA?
The magnitude 3.2 earthquake that struck 49 km W of Petrolia, CA on August 17, 2026 at 22:13 UTC had a depth of 14.7 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 3.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: nc75420282). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 17, 2026). M3.2 Earthquake 49 km W of Petrolia, CA — August 17, 2026. Retrieved August 17, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75420282/