⚠️ This earthquake carries a tsunami threat. Follow official guidance from your national agency.

6.3MAG

STRONG EARTHQUAKE

167 km W of Nikolski, Alaska

1 hour ago

USGSAUTOMATICTSUNAMI THREAT

A magnitude 6.3 earthquake struck 167 km W of Nikolski, Alaska on 17 Sept 2026, 14:19 UTC. The hypocentre was 83 km below the surface — intermediate by seismological convention. No felt reports have been received so far. The reporting agency flagged a tsunami threat for this event; follow official warnings rather than this page. This is an automatic solution that an analyst has not yet reviewed, so the magnitude and depth above may still change. 4 other earthquakes above our reporting threshold have been recorded within 250 km in the past 30 days.

Depth: 83 km
Latitude: 52.81°N
Time: 14:19 UTC
Magnitude: M6.3

EPICENTRE

View the official report↗

MAGNITUDE 6.3

Can be destructive in populated areas up to about 160 km across.

The scale is logarithmic: this released about 89 times the energy of a magnitude 5.0, roughly the energy of 43 thousand tonnes of TNT.

83 KM DEEP

At this depth the energy spreads before it reaches the surface. Shaking is usually weaker than a shallow earthquake of the same size, but it can be felt across a wider area.