TREMR

This moderate M5.4 earthquake was a shallow-focus event, striking at 10 km beneath Attu Station, Alaska. Moderate earthquakes are widely felt and can cause light damage near the epicenter, particularly to older or unreinforced structures.

At 10 km, this is a very shallow earthquake. Shallow-focus events typically generate stronger surface shaking relative to their magnitude, concentrating energy in a smaller area near the epicenter. A tsunami warning was issued in connection with this event.