M3.2 Earthquake 178 km E of Atka, Alaska — September 16, 2026
2026-09-16 20:00:16 UTC (2 days ago) · approx. 9:00 AM UTC-11 local
On September 16, 2026 at 20:00 UTC, a magnitude 3.2 shallow crustal earthquake struck 178 km E of Atka, Alaska, at a depth of 2.7 km and coordinates 52.0860°, -171.6060°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 951 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 97 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-171.6060°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Atka, Alaska?
The magnitude 3.2 earthquake that struck 178 km E of Atka, Alaska on September 16, 2026 at 20:00 UTC had a depth of 2.7 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 3.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026skbrqm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 16, 2026). M3.2 Earthquake 178 km E of Atka, Alaska — September 16, 2026. Retrieved September 19, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026skbrqm/