M3.5 Earthquake 22 km S of King Salmon, Alaska — January 31, 2025
2025-01-31 23:48:32 UTC (2025-01-31) · approx. 1:48 PM UTC-10 local
On January 31, 2025 at 23:48 UTC, a magnitude 3.5 intermediate depth earthquake struck 22 km S of King Salmon, Alaska, at a depth of 199.7 km and coordinates 58.4903°, -156.6191°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-156.6191°E
Technical Information
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Common Questions
How strong was the magnitude 3.5 earthquake near King Salmon, Alaska?
The magnitude 3.5 earthquake that struck 22 km S of King Salmon, Alaska on January 31, 2025 at 23:48 UTC had a depth of 199.7 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 3.5 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak0251fnn3pu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, January 31, 2025). M3.5 Earthquake 22 km S of King Salmon, Alaska — January 31, 2025. Retrieved April 15, 2025 from https://www.earthquaketracker.org/earthquakes/event/ak0251fnn3pu/