M4.1 Earthquake near Rat Islands, Aleutian Islands, Alaska — November 30, 2020
2020-11-30 19:22:35 UTC (2020-11-30) · approx. 7:22 AM UTC+12 local
On November 30, 2020 at 19:22 UTC, a magnitude 4.1 intermediate depth earthquake struck near Rat Islands, Aleutian Islands, Alaska, at a depth of 145.2 km and coordinates 52.3234°, 177.9129°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
177.9129°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Rat Islands, Aleutian Islands, Alaska?
The magnitude 4.1 earthquake that struck near Rat Islands, Aleutian Islands, Alaska on November 30, 2020 at 19:22 UTC had a depth of 145.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000cmlk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, November 30, 2020). M4.1 Earthquake near Rat Islands, Aleutian Islands, Alaska — November 30, 2020. Retrieved February 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000cmlk/