M3.1 Earthquake 17 km S of Tyonek, Alaska — November 12, 2020
2020-11-12 17:50:38 UTC (2020-11-12) · approx. 7:50 AM UTC-10 local
On November 12, 2020 at 17:50 UTC, a magnitude 3.1 shallow crustal earthquake struck 17 km S of Tyonek, Alaska, at a depth of 65.6 km and coordinates 60.9149°, -151.1706°.
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
-151.1706°E
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Common Questions
How strong was the magnitude 3.1 earthquake near Tyonek, Alaska?
The magnitude 3.1 earthquake that struck 17 km S of Tyonek, Alaska on November 12, 2020 at 17:50 UTC had a depth of 65.6 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: ak020ekjs6k2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, November 12, 2020). M3.1 Earthquake 17 km S of Tyonek, Alaska — November 12, 2020. Retrieved January 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak020ekjs6k2/