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5.3
EarthquakeStrong

M5.3 earthquake - 134 km NW of Attu Station, Alaska

2010 d ago · 15 Apr 2021, 08:33 UTC 134 km NW of Attu Station, Alaska

A tsunami flag was raised for this event. This does not mean a tsunami occurred. Always follow official tsunami warning centres and local authorities.

What happened

A magnitude 5.3 earthquake struck 134 km NW of Attu Station, Alaska on 15 Apr 2021, 08:33 UTC at a depth of 11 km.

Earthquakes of this size are classed as Moderate. Can damage poorly built structures close to the epicentre. This was a shallow earthquake, which tends to be felt more strongly at the surface.

Timeline

  1. First reported by USGS

    16 Oct 2026, 20:47 UTC

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