M3.1 Earthquake 143 km S of Unalaska, Alaska — November 3, 2026
2026-11-03 06:12:47 UTC (2 days ago) · approx. 7:12 PM UTC-11 local
On November 3, 2026 at 06:12 UTC, a magnitude 3.1 shallow crustal earthquake struck 143 km S of Unalaska, Alaska, at a depth of 19.3 km and coordinates 52.5820°, -166.6240°.
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
-166.6240°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Unalaska, Alaska?
The magnitude 3.1 earthquake that struck 143 km S of Unalaska, Alaska on November 3, 2026 at 06:12 UTC had a depth of 19.3 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: aka2026vtrdck). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, November 3, 2026). M3.1 Earthquake 143 km S of Unalaska, Alaska — November 3, 2026. Retrieved November 5, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026vtrdck/