An earthquake of magnitude 6.3 was recorded this Thursday, September 3, 2026, in the Alaska region, according to the United States Geological Survey.
The earthquake occurred at 11:17 local time, with the epicenter located 84 kilometers south-southwest of the town of Nikolski and at a depth of 35 kilometers.
Despite the intensity of the earthquake, the United States National Tsunami Warning Center immediately ruled out the possibility of a tsunami for the coasts of Alaska, the rest of the west coast of the United States or the Pacific.
In addition, the PAGER assessment system issued a green alert, indicating a low risk of fatalities or significant economic losses due to the remote location of the epicenter.
Event monitoring and aftershock forecasting
The United States seismic authorities confirmed the complete review of the technical data of the event:
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Impact assessment: The USGS ShakeMap intensity map classified the shaking at level IV (moderate), perceived mainly in nearby island areas without generating structural damage reported so far.
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High probability of aftershocks: The official USGS report indicates a 99% probability that aftershocks of magnitude 3.0 or greater will occur in the next seven days. Likewise, they estimate an 80% probability of magnitude 4.0 earthquakes and a 34% probability of magnitude 5.0 events in the same epicentral area.
The USGS and local emergency agencies maintain preventive monitoring in the Aleutian Archipelago in the face of the evolution of secondary activity.
