M3.1 Earthquake 87 km SSE of Akutan, Alaska — December 19, 2020
2020-12-19 18:26:20 UTC (2020-12-19) · approx. 7:26 AM UTC-11 local
On December 19, 2020 at 18:26 UTC, a magnitude 3.1 shallow crustal earthquake struck 87 km SSE of Akutan, Alaska, at a depth of 34.7 km and coordinates 53.3935°, -165.3384°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-165.3384°E
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Common Questions
How strong was the magnitude 3.1 earthquake near Akutan, Alaska?
The magnitude 3.1 earthquake that struck 87 km SSE of Akutan, Alaska on December 19, 2020 at 18:26 UTC had a depth of 34.7 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000d47n). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 19, 2020). M3.1 Earthquake 87 km SSE of Akutan, Alaska — December 19, 2020. Retrieved February 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d47n/