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A micro magnitude 2.9 earthquake struck near Rat Islands, Aleutian Islands, United States on Thursday, August 27, 2026 at 04:55:30 AM UTC. This intermediate focal depth (72.4 km depth) released energy equivalent to approximately 338 kg of TNT. Here is the verified US telemetry, live epicenter map, and ground shaking assessment.
2.9ML
Micro Seismic Class
72.4km
Upper Mantle
51.496° N, 178.444° E
GPS Coordinates
338 kg
TNT Equivalent Power
US
USGS Real-time Feed
A magnitude 2.9 event is classified as a micro earthquake. Micro-earthquakes are rarely felt by humans and are typically recorded only by sensitive seismometers.
The epicenter occurred in a remote or offshore marine sector with no major population centers situated within the primary ground shaking perimeter.
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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 72.4 km (Upper Mantle / Wadati-Benioff Zone (70–300 km)), this rupture occurred originated within the descending oceanic plate inside the upper mantle. shaking radiates over a wider geographic area with attenuated high frequencies.
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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