M3.0 Earthquake 17 km ESE of Port Graham, Alaska — August 3, 2026
2026-08-03 22:26:35 UTC (1 hour ago) · approx. 12:26 PM UTC-10 local
On August 3, 2026 at 22:26 UTC, a magnitude 3.0 shallow crustal earthquake struck 17 km ESE of Port Graham, Alaska, at a depth of 37.6 km and coordinates 59.2890°, -151.5440°.
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
-151.5440°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Port Graham, Alaska?
The magnitude 3.0 earthquake that struck 17 km ESE of Port Graham, Alaska on August 3, 2026 at 22:26 UTC had a depth of 37.6 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 3.0 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: aka2026pgzpes). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 3, 2026). M3.0 Earthquake 17 km ESE of Port Graham, Alaska — August 3, 2026. Retrieved August 3, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026pgzpes/