TREMR

This moderate M5.1 earthquake was a shallow-focus event, striking at 4 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 4 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.