M3.3 Earthquake in the Unimak Island region, Alaska — December 22, 2022
2022-12-22 21:11:57 UTC (2022-12-22) · approx. 10:11 AM UTC-11 local
On December 22, 2022 at 21:11 UTC, a magnitude 3.3 intermediate depth earthquake struck in the Unimak Island region, Alaska, at a depth of 178.8 km and coordinates 55.0700°, -164.9428°.
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
-164.9428°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake in the Unimak Island region, Alaska?
The magnitude 3.3 earthquake that struck in the Unimak Island region, Alaska on December 22, 2022 at 21:11 UTC had a depth of 178.8 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: us7000j2wq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, December 22, 2022). M3.3 Earthquake in the Unimak Island region, Alaska — December 22, 2022. Retrieved February 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000j2wq/