M3.3 Earthquake 47 km NE of Susitna North, Alaska — August 4, 2026
2026-08-04 09:45:40 UTC (1 hour ago) · approx. 11:45 PM UTC-10 local
On August 4, 2026 at 09:45 UTC, a magnitude 3.3 shallow crustal earthquake struck 47 km NE of Susitna North, Alaska, at a depth of 57.6 km and coordinates 62.4390°, -149.1670°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-149.1670°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Susitna North, Alaska?
The magnitude 3.3 earthquake that struck 47 km NE of Susitna North, Alaska on August 4, 2026 at 09:45 UTC had a depth of 57.6 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026phwetk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 4, 2026). M3.3 Earthquake 47 km NE of Susitna North, Alaska — August 4, 2026. Retrieved August 4, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026phwetk/