M3.0 Earthquake 66 km NNE of Petersville, Alaska — September 28, 2025
2025-09-28 20:02:47 UTC (2025-09-28) · approx. 10:02 AM UTC-10 local
On September 28, 2025 at 20:02 UTC, a magnitude 3.0 intermediate depth earthquake struck 66 km NNE of Petersville, Alaska, at a depth of 102.2 km and coordinates 63.0767°, -150.4650°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-150.4650°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Petersville, Alaska?
The magnitude 3.0 earthquake that struck 66 km NNE of Petersville, Alaska on September 28, 2025 at 20:02 UTC had a depth of 102.2 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak025cgik8x1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 28, 2025). M3.0 Earthquake 66 km NNE of Petersville, Alaska — September 28, 2025. Retrieved December 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/ak025cgik8x1/