M3.4 Earthquake 265 km SE of Chiniak, Alaska — March 30, 2025
2025-03-30 23:55:49 UTC (2025-03-30) · approx. 1:55 PM UTC-10 local
On March 30, 2025 at 23:55 UTC, a magnitude 3.4 shallow crustal earthquake struck 265 km SE of Chiniak, Alaska, at a depth of 12.6 km and coordinates 55.9218°, -149.2251°.
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
-149.2251°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.4 earthquake near Chiniak, Alaska?
The magnitude 3.4 earthquake that struck 265 km SE of Chiniak, Alaska on March 30, 2025 at 23:55 UTC had a depth of 12.6 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: us7000publ). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 30, 2025). M3.4 Earthquake 265 km SE of Chiniak, Alaska — March 30, 2025. Retrieved June 6, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000publ/