M3.1 Earthquake 28 km NE of Atka, Alaska — February 27, 2025
2025-02-27 18:55:31 UTC (2025-02-27) · approx. 6:55 AM UTC-12 local
On February 27, 2025 at 18:55 UTC, a magnitude 3.1 intermediate depth earthquake struck 28 km NE of Atka, Alaska, at a depth of 179.8 km and coordinates 52.3678°, -173.8934°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-173.8934°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Atka, Alaska?
The magnitude 3.1 earthquake that struck 28 km NE of Atka, Alaska on February 27, 2025 at 18:55 UTC had a depth of 179.8 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000pnhm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 27, 2025). M3.1 Earthquake 28 km NE of Atka, Alaska — February 27, 2025. Retrieved May 8, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pnhm/