M3.3 Earthquake 97 km SSW of Atka, Alaska — September 28, 2026
2026-09-28 11:13:35 UTC (1 day ago) · approx. 11:13 PM UTC-12 local
On September 28, 2026 at 11:13 UTC, a magnitude 3.3 shallow crustal earthquake struck 97 km SSW of Atka, Alaska, at a depth of 6.8 km and coordinates 51.4420°, -174.9080°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-174.9080°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Atka, Alaska?
The magnitude 3.3 earthquake that struck 97 km SSW of Atka, Alaska on September 28, 2026 at 11:13 UTC had a depth of 6.8 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026tfojkt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 28, 2026). M3.3 Earthquake 97 km SSW of Atka, Alaska — September 28, 2026. Retrieved September 29, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026tfojkt/