Adak, Alaska – A magnitude 3.8 earthquake struck remote waters southwest of Adak late Tuesday morning, registering at a depth of 10 kilometers and prompting monitoring across the Aleutian chain.
According to the U.S. Geological Survey, the quake occurred at 9:17 a.m. local time, about 164 kilometers southwest of Adak. The event was reviewed by seismologists and showed no signs of triggering a tsunami or widespread shaking across populated areas.
Communities along the Aleutian Islands, including Adak and nearby Atka, are unlikely to experience significant effects due to the offshore location and moderate magnitude. No infrastructure impacts or disruptions to air or marine travel have been reported. The Alaska Earthquake Center continues routine monitoring, particularly along this active subduction zone where the Pacific Plate meets the North American Plate.
Residents in the region are advised to remain aware of aftershocks, though none with notable strength have been detected within the first hour following the event. Emergency management officials note that quakes below magnitude 4.0 in this region rarely cause damage but serve as reminders of ongoing seismic activity.
Monitoring will continue through Tuesday, with additional updates expected if conditions change.
