M3.3 Earthquake 14 km NNW of Atka, Alaska — July 13, 2025
2025-07-13 22:10:10 UTC (2025-07-13) · approx. 10:10 AM UTC-12 local
On July 13, 2025 at 22:10 UTC, a magnitude 3.3 intermediate depth earthquake struck 14 km NNW of Atka, Alaska, at a depth of 186.5 km and coordinates 52.3211°, -174.2675°.
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
-174.2675°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Atka, Alaska?
The magnitude 3.3 earthquake that struck 14 km NNW of Atka, Alaska on July 13, 2025 at 22:10 UTC had a depth of 186.5 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: us6000qug6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 13, 2025). M3.3 Earthquake 14 km NNW of Atka, Alaska — July 13, 2025. Retrieved November 28, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qug6/