Adak, Alaska – A magnitude 5.0 earthquake struck Monday evening about 71 kilometers south-southwest of Adak, shaking parts of Alaska’s remote Aleutian Islands. The U.S. Geological Survey (USGS) recorded the quake at 6:45 p.m. UTC (10:45 a.m. local time) at a depth of 35 kilometers beneath the Pacific.
According to the USGS, only light shaking was reported on Adak Island, with no immediate reports of damage or injuries. The agency’s intensity map rated the tremor as level III, meaning it was felt indoors by a few residents but caused no structural impact.
Seismic activity is common in the Aleutian chain, which sits on the volatile boundary of the Pacific and North American tectonic plates. While the quake’s strength was moderate, aftershock probabilities remain notable—USGS estimates a 27% chance of at least one magnitude 4 or greater aftershock in the next week.
Emergency management officials remind residents to review earthquake safety steps, including securing heavy furniture, keeping emergency kits stocked, and knowing safe shelter locations within their homes.
The USGS continues to monitor the area, and residents are encouraged to report any felt shaking through the “Did You Feel It?” program. No tsunami warning was issued, and the region remains under observation for potential aftershocks.
