M3.1 Earthquake 56 km SSW of Nikolski, Alaska — April 28, 2026
2026-04-28 02:23:46 UTC (4 days ago) · approx. 3:23 PM UTC-11 local
On April 28, 2026 at 02:23 UTC, a magnitude 3.1 shallow crustal earthquake struck 56 km SSW of Nikolski, Alaska, at a depth of 28.1 km and coordinates 52.4480°, -169.0800°.
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
-169.0800°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Nikolski, Alaska?
The magnitude 3.1 earthquake that struck 56 km SSW of Nikolski, Alaska on April 28, 2026 at 02:23 UTC had a depth of 28.1 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.
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: aka2026igysvu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 28, 2026). M3.1 Earthquake 56 km SSW of Nikolski, Alaska — April 28, 2026. Retrieved May 2, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026igysvu/