M3.4 Earthquake 263 km SSE of Attu Station, Alaska — September 5, 2026
2026-09-05 22:37:26 UTC (3 days ago) · approx. 10:37 AM UTC+12 local
On September 5, 2026 at 22:37 UTC, a magnitude 3.4 shallow crustal earthquake struck 263 km SSE of Attu Station, Alaska, at a depth of 20.0 km and coordinates 50.8750°, 175.3140°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.9 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 134 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
175.3140°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Attu Station, Alaska?
The magnitude 3.4 earthquake that struck 263 km SSE of Attu Station, Alaska on September 5, 2026 at 22:37 UTC had a depth of 20.0 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026rpyrso). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 5, 2026). M3.4 Earthquake 263 km SSE of Attu Station, Alaska — September 5, 2026. Retrieved September 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026rpyrso/