M3.0 Earthquake 76 km W of Adak, Alaska — October 28, 2026
2026-10-28 04:51:27 UTC (2026-10-28) · approx. 4:51 PM UTC-12 local
On October 28, 2026 at 04:51 UTC, a magnitude 3.0 shallow crustal earthquake struck 76 km W of Adak, Alaska, at a depth of 11.4 km and coordinates 51.8520°, -177.7430°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.7430°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Adak, Alaska?
The magnitude 3.0 earthquake that struck 76 km W of Adak, Alaska on October 28, 2026 at 04:51 UTC had a depth of 11.4 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026vimhfm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 28, 2026). M3.0 Earthquake 76 km W of Adak, Alaska — October 28, 2026. Retrieved November 2, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026vimhfm/