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

4.3MAG

LIGHT EARTHQUAKE

69 km SSW of Kaktovik, Alaska

2 days ago

USGSTSUNAMI THREAT

A magnitude 4.3 earthquake struck 69 km SSW of Kaktovik, Alaska on 15 Sept 2026, 09:51 UTC. The hypocentre was 6.6 km below the surface — shallow by seismological convention. The reporting agency flagged a tsunami threat for this event; follow official warnings rather than this page.

Depth: 6.6 km
Latitude: 69.54°N
Time: 09:51 UTC
Magnitude: M4.3

EPICENTRE

View the official report↗

MAGNITUDE 4.3

Noticeable shaking of indoor objects. Damage is unlikely.

The scale is logarithmic: this released about 89 times the energy of a magnitude 3.0, roughly the energy of 43 tonnes of TNT.

6.6 KM DEEP

Shallow earthquakes release their energy close to the surface, so they are felt more strongly, and do more damage, than deeper earthquakes of the same magnitude.