186 km SE of Terney, Russia

20 days ago

USGS

A magnitude 4.0 earthquake struck 186 km SE of Terney, Russia on 29 Aug 2026, 13:25 UTC. The hypocentre was 257.2 km below the surface — intermediate by seismological convention.

Depth: 257.2 km
Latitude: 43.89°N
Time: 13:25 UTC
Magnitude: M4.0

EPICENTRE

View the official report↗

MAGNITUDE 4.0

Noticeable shaking of indoor objects. Damage is unlikely.

The scale is logarithmic: this released about 32 times the energy of a magnitude 3.0, roughly the energy of 15 tonnes of TNT.

257.2 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.