M3.2 Earthquake near Rat Islands, Aleutian Islands, Alaska — December 9, 2021
2021-12-09 19:24:15 UTC (2021-12-09) · approx. 7:24 AM UTC+12 local
On December 9, 2021 at 19:24 UTC, a magnitude 3.2 shallow crustal earthquake struck near Rat Islands, Aleutian Islands, Alaska, at a depth of 10.0 km and coordinates 52.0074°, 178.2865°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 951 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 97 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
178.2865°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Rat Islands, Aleutian Islands, Alaska?
The magnitude 3.2 earthquake that struck near Rat Islands, Aleutian Islands, Alaska on December 9, 2021 at 19:24 UTC had a depth of 10.0 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 3.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000gb1u). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 9, 2021). M3.2 Earthquake near Rat Islands, Aleutian Islands, Alaska — December 9, 2021. Retrieved February 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gb1u/