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A micro magnitude 2.8 earthquake struck 239 km WSW of Adak, United States on Saturday, August 29, 2026 at 03:26:32 PM UTC. This shallow crustal event (13.6 km depth) released energy equivalent to approximately 239 kg of TNT. Here is the verified AK telemetry, live epicenter map, and ground shaking assessment.
(239 km WSW of)2.8ML
Micro Seismic Class
13.6km
Crustal Layer
51.045° N, 179.818° W
GPS Coordinates
239 kg
TNT Equivalent Power
AK
USGS Real-time Feed
A magnitude 2.8 event is classified as a micro earthquake. Micro-earthquakes are rarely felt by humans and are typically recorded only by sensitive seismometers.
Felt by almost no one except under extraordinarily favorable conditions.
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Earthquake strength is measured on a logarithmic scale. Compare this event with the full seismic scale:
Because seismic scales are logarithmic, each whole integer increase represents:
United States's seismicity is fundamentally governed by its tectonic setting: Pacific Plate sliding past North American Plate along San Andreas; Juan de Fuca subducting along Cascadia; Pacific subduction along the Aleutian Trench. Major regional fault structures include San Andreas Fault System, Cascadia Subduction Zone, Aleutian Megathrust, Hayward Fault, New Madrid Seismic Zone.
Originating at a depth of 13.6 km (Earth's Crust (0–70 km)), this rupture occurred occurred within the brittle upper crust. shallow earthquakes produce the highest peak ground acceleration and the sharpest surface shaking.
Micro-tremors and minor events of this scale are part of ongoing background tectonic relaxation. While isolated micro-aftershocks may occur, the likelihood of a damaging secondary event remains statistically low under normal seismic conditions.
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