M3.1 Earthquake 43 km N of Petersville, Alaska — October 19, 2026
2026-10-19 23:02:15 UTC (4 hours ago) · approx. 1:02 PM UTC-10 local
On October 19, 2026 at 23:02 UTC, a magnitude 3.1 intermediate depth earthquake struck 43 km N of Petersville, Alaska, at a depth of 105.7 km and coordinates 62.8850°, -150.9040°.
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
-150.9040°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 N of Petersville, Alaska on October 19, 2026 at 23:02 UTC had a depth of 105.7 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 3.1 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: aka2026utglwb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 19, 2026). M3.1 Earthquake 43 km N of Petersville, Alaska — October 19, 2026. Retrieved October 19, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026utglwb/