A magnitude 5.0 earthquake occurred in the Rat Islands, part of Alaska's Aleutian Islands, on August 23, 2026. The seismic event, which registered at a shallow depth of 7 kilometers, was reported by the U.S. Geological Survey (USGS).

The earthquake struck at 23:20:35 Universal Time (UTC) and was centered approximately 239.6 kilometers (148.6 miles) east-southeast of Attu Station, Alaska. This preliminary report has been reviewed by a seismologist.