M3.3 Earthquake 206 km W of Adak, Alaska — October 25, 2023
2023-10-25 17:42:07 UTC (2023-10-25) · approx. 5:42 AM UTC-12 local
On October 25, 2023 at 17:42 UTC, a magnitude 3.3 intermediate depth earthquake struck 206 km W of Adak, Alaska, at a depth of 105.5 km and coordinates 51.8114°, -179.6302°.
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
-179.6302°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Adak, Alaska?
The magnitude 3.3 earthquake that struck 206 km W of Adak, Alaska on October 25, 2023 at 17:42 UTC had a depth of 105.5 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: us7000la9l). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 25, 2023). M3.3 Earthquake 206 km W of Adak, Alaska — October 25, 2023. Retrieved January 4, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000la9l/