M3.1 Earthquake 28 km WNW of Nikiski, Alaska — October 9, 2026
2026-10-09 18:40:03 UTC (1 hour ago) · approx. 8:40 AM UTC-10 local
On October 9, 2026 at 18:40 UTC, a magnitude 3.1 intermediate depth earthquake struck 28 km WNW of Nikiski, Alaska, at a depth of 84.5 km and coordinates 60.8290°, -151.7370°.
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
-151.7370°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Nikiski, Alaska?
The magnitude 3.1 earthquake that struck 28 km WNW of Nikiski, Alaska on October 9, 2026 at 18:40 UTC had a depth of 84.5 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: aka2026ualmwh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 9, 2026). M3.1 Earthquake 28 km WNW of Nikiski, Alaska — October 9, 2026. Retrieved October 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026ualmwh/