50 km S of Aceh Singkil

9 days ago

BMKGFELT

A magnitude 4.0 earthquake struck 50 km S of Aceh Singkil on 10 Oct 2026, 12:28 UTC. The hypocentre was 9 km below the surface — shallow by seismological convention. Shaking was reported in Aceh Singkil.

Depth: 9 km
Latitude: 1.91°N
Time: 12:28 UTC
Magnitude: M4.0

REPORTED SHAKING (MMI SCALE)

IIIAceh Singkilweak shaking

EPICENTRE

SEA

SHAKEMAP (BMKG)

BMKG shakemap for the M4 earthquake near Aceh Singkil

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.

9 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.