M3.1 Earthquake 43 km NNW of Petersville, Alaska — October 10, 2026
2026-10-10 23:42:03 UTC (1 hour ago) · approx. 1:42 PM UTC-10 local
On October 10, 2026 at 23:42 UTC, a magnitude 3.1 intermediate depth earthquake struck 43 km NNW of Petersville, Alaska, at a depth of 113.1 km and coordinates 62.8710°, -151.0200°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-151.0200°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Petersville, Alaska?
The magnitude 3.1 earthquake that struck 43 km NNW of Petersville, Alaska on October 10, 2026 at 23:42 UTC had a depth of 113.1 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026ucrphh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 10, 2026). M3.1 Earthquake 43 km NNW of Petersville, Alaska — October 10, 2026. Retrieved October 11, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026ucrphh/