Magnitude 5.1 earthquake strikes 92 km SE of Atka, Alaska

A magnitude 5.1 earthquake struck 92 km southeast of Atka, Alaska, on Thursday, July 23, 2026, at 09:30:18 GMT. The United States Geological Survey (USGS) reported the seismic event occurred at a depth of 35 kilometers, with its epicenter located at coordinates 51.604 latitude and -173.2484 longitude.

The USGS, a scientific agency of the United States government, monitors and reports on earthquakes globally. Magnitude, a measure derived from seismic waves recorded on a seismograph, describes the size of an earthquake at its source. Deeper earthquakes, such as this one, can sometimes be felt over a wider area but often cause less intense shaking at the surface compared to shallower events of similar magnitude.