M3.8 Earthquake 67 km ESE of Denali National Park, Alaska — January 8, 2021
2021-01-08 20:29:15 UTC (2021-01-08) · approx. 10:29 AM UTC-10 local
On January 8, 2021 at 20:29 UTC, a magnitude 3.8 intermediate depth earthquake struck 67 km ESE of Denali National Park, Alaska, at a depth of 126.7 km and coordinates 63.2300°, -150.5753°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-150.5753°E
Technical Information
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Common Questions
How strong was the magnitude 3.8 earthquake near Denali National Park, Alaska?
The magnitude 3.8 earthquake that struck 67 km ESE of Denali National Park, Alaska on January 8, 2021 at 20:29 UTC had a depth of 126.7 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 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak021dkdp8o). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 8, 2021). M3.8 Earthquake 67 km ESE of Denali National Park, Alaska — January 8, 2021. Retrieved March 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak021dkdp8o/