M3.0 Earthquake 43 km NW of Mentasta Lake, Alaska — February 21, 2023
2023-02-21 19:29:49 UTC (2023-02-21) · approx. 9:29 AM UTC-10 local
On February 21, 2023 at 19:29 UTC, a magnitude 3.0 shallow crustal earthquake struck 43 km NW of Mentasta Lake, Alaska, at a depth of 10.3 km and coordinates 63.1965°, -144.3761°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-144.3761°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Mentasta Lake, Alaska?
The magnitude 3.0 earthquake that struck 43 km NW of Mentasta Lake, Alaska on February 21, 2023 at 19:29 UTC had a depth of 10.3 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak0232ebflqz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 21, 2023). M3.0 Earthquake 43 km NW of Mentasta Lake, Alaska — February 21, 2023. Retrieved April 29, 2023 from https://www.earthquaketracker.org/earthquakes/event/ak0232ebflqz/