M3.0 Earthquake 55 km WNW of Tyonek, Alaska — February 20, 2026
2026-02-20 20:25:21 UTC (2026-02-20) · approx. 10:25 AM UTC-10 local
On February 20, 2026 at 20:25 UTC, a magnitude 3.0 intermediate depth earthquake struck 55 km WNW of Tyonek, Alaska, at a depth of 108.9 km and coordinates 61.2420°, -152.1060°.
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
-152.1060°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Tyonek, Alaska?
The magnitude 3.0 earthquake that struck 55 km WNW of Tyonek, Alaska on February 20, 2026 at 20:25 UTC had a depth of 108.9 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: aka2026dpixxc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, February 20, 2026). M3.0 Earthquake 55 km WNW of Tyonek, Alaska — February 20, 2026. Retrieved July 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026dpixxc/