M3.1 Earthquake 80 km SE of Unalaska, Alaska — November 29, 2025
2025-11-29 20:33:05 UTC (2025-11-29) · approx. 9:33 AM UTC-11 local
On November 29, 2025 at 20:33 UTC, a magnitude 3.1 shallow crustal earthquake struck 80 km SE of Unalaska, Alaska, at a depth of 17.4 km and coordinates 53.3230°, -165.7420°.
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
-165.7420°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Unalaska, Alaska?
The magnitude 3.1 earthquake that struck 80 km SE of Unalaska, Alaska on November 29, 2025 at 20:33 UTC had a depth of 17.4 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.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Actions
Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak2025xmzyuw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, November 29, 2025). M3.1 Earthquake 80 km SE of Unalaska, Alaska — November 29, 2025. Retrieved May 24, 2026 from https://www.earthquaketracker.org/earthquakes/event/ak2025xmzyuw/