M4.1 Earthquake 230 km ESE of Attu Station, Alaska — March 4, 2026
2026-03-04 22:14:56 UTC (2026-03-04) · approx. 10:14 AM UTC+12 local
On March 4, 2026 at 22:14 UTC, a magnitude 4.1 shallow crustal earthquake struck 230 km ESE of Attu Station, Alaska, at a depth of 8.8 km and coordinates 52.3868°, 176.5077°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
176.5077°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Attu Station, Alaska?
The magnitude 4.1 earthquake that struck 230 km ESE of Attu Station, Alaska on March 4, 2026 at 22:14 UTC had a depth of 8.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Actions
Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000sgu3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 4, 2026). M4.1 Earthquake 230 km ESE of Attu Station, Alaska — March 4, 2026. Retrieved May 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sgu3/