M3.2 Earthquake 40 km WNW of Atka, Alaska — November 20, 2023
2023-11-20 19:51:55 UTC (2023-11-20) · approx. 7:51 AM UTC-12 local
On November 20, 2023 at 19:51 UTC, a magnitude 3.2 intermediate depth earthquake struck 40 km WNW of Atka, Alaska, at a depth of 175.2 km and coordinates 52.3866°, -174.7003°.
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
-174.7003°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 40 km WNW of Atka, Alaska on November 20, 2023 at 19:51 UTC had a depth of 175.2 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: us6000lppq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, November 20, 2023). M3.2 Earthquake 40 km WNW of Atka, Alaska — November 20, 2023. Retrieved February 1, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000lppq/