M3.1 Earthquake 60 km SE of Denali National Park, Alaska — April 18, 2023
2023-04-18 22:01:37 UTC (2023-04-18) · approx. 12:01 PM UTC-10 local
On April 18, 2023 at 22:01 UTC, a magnitude 3.1 intermediate depth earthquake struck 60 km SE of Denali National Park, Alaska, at a depth of 126.6 km and coordinates 63.1949°, -150.7962°.
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
-150.7962°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Denali National Park, Alaska?
The magnitude 3.1 earthquake that struck 60 km SE of Denali National Park, Alaska on April 18, 2023 at 22:01 UTC had a depth of 126.6 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: ak0234yz5b8k). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, April 18, 2023). M3.1 Earthquake 60 km SE of Denali National Park, Alaska — April 18, 2023. Retrieved July 3, 2023 from https://www.earthquaketracker.org/earthquakes/event/ak0234yz5b8k/