M3.3 Earthquake 242 km S of False Pass, Alaska — February 20, 2025
2025-02-20 17:22:41 UTC (2025-02-20) · approx. 6:22 AM UTC-11 local
On February 20, 2025 at 17:22 UTC, a magnitude 3.3 shallow crustal earthquake struck 242 km S of False Pass, Alaska, at a depth of 10.0 km and coordinates 52.6906°, -163.0267°.
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
-163.0267°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near False Pass, Alaska?
The magnitude 3.3 earthquake that struck 242 km S of False Pass, Alaska on February 20, 2025 at 17:22 UTC had a depth of 10.0 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 3.3 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: us7000pf1w). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 20, 2025). M3.3 Earthquake 242 km S of False Pass, Alaska — February 20, 2025. Retrieved May 6, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pf1w/