25 km N of Mutsu, Japan

4 days ago

USGS

A magnitude 4.7 earthquake struck 25 km N of Mutsu, Japan on 13 Sept 2026, 08:31 UTC. The hypocentre was 120.4 km below the surface — intermediate by seismological convention.

Depth: 120.4 km
Latitude: 41.51°N
Time: 08:31 UTC
Magnitude: M4.7

EPICENTRE

View the official report↗

MAGNITUDE 4.7

Noticeable shaking of indoor objects. Damage is unlikely.

The scale is logarithmic: this released about 350 times the energy of a magnitude 3.0, roughly the energy of 169 tonnes of TNT.

120.4 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.