M3.3 Earthquake 164 km SSE of Atka, Alaska — July 12, 2026
2026-07-12 23:43:15 UTC (2026-07-12) · approx. 11:43 AM UTC-12 local
On July 12, 2026 at 23:43 UTC, a magnitude 3.3 shallow crustal earthquake struck 164 km SSE of Atka, Alaska, at a depth of 41.2 km and coordinates 50.8396°, -173.2684°.
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
-173.2684°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Atka, Alaska?
The magnitude 3.3 earthquake that struck 164 km SSE of Atka, Alaska on July 12, 2026 at 23:43 UTC had a depth of 41.2 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: us7000t2ay). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 12, 2026). M3.3 Earthquake 164 km SSE of Atka, Alaska — July 12, 2026. Retrieved August 3, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t2ay/