[2] The mainshock had a maximum Modified Mercalli intensity (MMI) of IX (Violent) in Davao and Sarangani.

[3] On Sangihe Island, seismic shaking lasted 4 ± 2 minutes and there was an intense rumble.

Homes located on the swamp were raised from the ground and sank on their sides or collapsed.

Subsidence occurred in the Menalu area; the sea inundated parts of the plain and remaining residents relocated.

West of that, a mudflow traveled 1 km (0.62 mi) down from Endongo Hill, burying 117 villagers and 29 houses.

[4] Shaking lasted half a minute on the Sarangani Islands and many trees toppled.

Huts made from palm leaves sank on their side and some stone walls collapsed.

[4] The Straits Times and Malay Mail reported a volcanic eruption at Mount Awu.