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4.3MAG

LIGHT EARTHQUAKE

65 km SW of Nikolski, Alaska

USGS

A magnitude 4.3 earthquake struck 65 km SW of Nikolski, Alaska on 03 Sept 2026, 16:30 UTC. The hypocentre was 52.6 km below the surface — shallow by seismological convention. 38 other earthquakes above our reporting threshold have been recorded within 250 km in the past 30 days.

Depth
52.6 km

shallow

Latitude
52.50°N

169.52°W longitude

Time
16:30 UTC

03 Sept 2026

Magnitude
M4.3

mb

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.

52.6 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.

NEARBY IN THE PAST 30 DAYS

38 earthquakes above our reporting threshold within 250 km of this one, the largest a magnitude 6.5.

OTHER RECENT EARTHQUAKES

M4.3 earthquake — Nikolski, Alaska · Quakewire