M3.2 Earthquake 63 km ESE of Denali National Park, Alaska — October 15, 2021
2021-10-15 18:46:40 UTC (2021-10-15) · approx. 8:46 AM UTC-10 local
On October 15, 2021 at 18:46 UTC, a magnitude 3.2 intermediate depth earthquake struck 63 km ESE of Denali National Park, Alaska, at a depth of 128.3 km and coordinates 63.2451°, -150.6302°.
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
-150.6302°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Denali National Park, Alaska?
The magnitude 3.2 earthquake that struck 63 km ESE of Denali National Park, Alaska on October 15, 2021 at 18:46 UTC had a depth of 128.3 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: ak021d8lrp2e). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 15, 2021). M3.2 Earthquake 63 km ESE of Denali National Park, Alaska — October 15, 2021. Retrieved December 25, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak021d8lrp2e/