M3.3 Earthquake near Rat Islands, Aleutian Islands, Alaska — October 17, 2023
2023-10-17 20:41:16 UTC (2023-10-17) · approx. 8:41 AM UTC+12 local
On October 17, 2023 at 20:41 UTC, a magnitude 3.3 shallow crustal earthquake struck near Rat Islands, Aleutian Islands, Alaska, at a depth of 53.9 km and coordinates 51.4664°, 178.6454°.
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
178.6454°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Rat Islands, Aleutian Islands, Alaska?
The magnitude 3.3 earthquake that struck near Rat Islands, Aleutian Islands, Alaska on October 17, 2023 at 20:41 UTC had a depth of 53.9 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: us7000l8eg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 17, 2023). M3.3 Earthquake near Rat Islands, Aleutian Islands, Alaska — October 17, 2023. Retrieved December 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000l8eg/