M3.4 Earthquake 90 km ESE of King Salmon, Alaska — September 6, 2025
2025-09-06 15:04:18 UTC (2025-09-06) · approx. 5:04 AM UTC-10 local
On September 6, 2025 at 15:04 UTC, a magnitude 3.4 shallow crustal earthquake struck 90 km ESE of King Salmon, Alaska, at a depth of 0.0 km and coordinates 58.2739°, -155.3288°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.9 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 134 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-155.3288°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near King Salmon, Alaska?
The magnitude 3.4 earthquake that struck 90 km ESE of King Salmon, Alaska on September 6, 2025 at 15:04 UTC had a depth of 0.0 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak025bg1rt7z). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 6, 2025). M3.4 Earthquake 90 km ESE of King Salmon, Alaska — September 6, 2025. Retrieved November 30, 2025 from https://www.earthquaketracker.org/earthquakes/event/ak025bg1rt7z/