M3.1 Earthquake 222 km SE of Akutan, Alaska — July 20, 2026
2026-07-20 03:20:20 UTC (2 days ago) · approx. 4:20 PM UTC-11 local
On July 20, 2026 at 03:20 UTC, a magnitude 3.1 shallow crustal earthquake struck 222 km SE of Akutan, Alaska, at a depth of 66.1 km and coordinates 52.6370°, -163.5660°.
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
-163.5660°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Akutan, Alaska?
The magnitude 3.1 earthquake that struck 222 km SE of Akutan, Alaska on July 20, 2026 at 03:20 UTC had a depth of 66.1 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: aka2026ofrbma). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 20, 2026). M3.1 Earthquake 222 km SE of Akutan, Alaska — July 20, 2026. Retrieved July 22, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026ofrbma/