M3.2 Earthquake 8 km SSE of Skwentna, Alaska — December 13, 2020
2020-12-13 17:40:04 UTC (2020-12-13) · approx. 7:40 AM UTC-10 local
On December 13, 2020 at 17:40 UTC, a magnitude 3.2 intermediate depth earthquake struck 8 km SSE of Skwentna, Alaska, at a depth of 75.7 km and coordinates 61.9182°, -151.3535°.
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
-151.3535°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Skwentna, Alaska?
The magnitude 3.2 earthquake that struck 8 km SSE of Skwentna, Alaska on December 13, 2020 at 17:40 UTC had a depth of 75.7 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: ak020fztdq0g). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 13, 2020). M3.2 Earthquake 8 km SSE of Skwentna, Alaska — December 13, 2020. Retrieved February 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak020fztdq0g/