M3.2 Earthquake 72 km ESE of Atka, Alaska — November 13, 2020
2020-11-13 21:38:20 UTC (2020-11-13) · approx. 9:38 AM UTC-12 local
On November 13, 2020 at 21:38 UTC, a magnitude 3.2 intermediate depth earthquake struck 72 km ESE of Atka, Alaska, at a depth of 100.0 km and coordinates 52.0100°, -173.1880°.
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
-173.1880°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Atka, Alaska?
The magnitude 3.2 earthquake that struck 72 km ESE of Atka, Alaska on November 13, 2020 at 21:38 UTC had a depth of 100.0 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: us7000cn8v). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, November 13, 2020). M3.2 Earthquake 72 km ESE of Atka, Alaska — November 13, 2020. Retrieved January 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000cn8v/