M3.1 Earthquake 48 km NW of Nelson Lagoon, Alaska — September 4, 2026
2026-09-04 01:27:46 UTC (4 hours ago) · approx. 2:27 PM UTC-11 local
On September 4, 2026 at 01:27 UTC, a magnitude 3.1 intermediate depth earthquake struck 48 km NW of Nelson Lagoon, Alaska, at a depth of 216.7 km and coordinates 56.2730°, -161.8250°.
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
-161.8250°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Nelson Lagoon, Alaska?
The magnitude 3.1 earthquake that struck 48 km NW of Nelson Lagoon, Alaska on September 4, 2026 at 01:27 UTC had a depth of 216.7 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.
Actions
Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026rmmigw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 4, 2026). M3.1 Earthquake 48 km NW of Nelson Lagoon, Alaska — September 4, 2026. Retrieved September 4, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026rmmigw/