A massive 7.8-magnitude earthquake rocked an island in the Philippines Monday, cratering buildings and killing at least 32 people, according to officials. The quake was followed by more than 130 aftershocks ranging from 1.3 to 6.7.

The quake struck off the coast of Mindanao Island in the southern Philippines at 7:37 a.m. local time and triggered tsunami alerts that were later canceled. Video footage shows buildings collapsing. About 100 people were injured, dozens are missing, and about 10,000 people were evacuated. The earthquake triggered landslides in some areas, killing 17 in the coastal province of Sarangani, which also temporarily lost power. It also triggered small tsunami waves that reached the coasts of Japan and Indonesia, measuring a few centimeters to one meter.

The Office of Civil Defense said that in General Santos, the city closest to the epicenter, 10 people were killed and 22 are missing.

Mindanao, the second largest Philippine island, houses a population of around 26 million.

“The national government is moving and we will not leave Mindanao behind,” Philippine President Ferdinand Marcos Jr. said in a statement, assuring the public that the government was coordinating a response. He also ordered the cancelation of schools; today was the first day of the school year in the Philippines.

Video footage shows terrified students in the Davao Occidental province crouching on the shaking ground while a roof crumples behind them. The school later said that no one had been injured.

Sitting on the unstable “ring of fire,” the Philippines is susceptible to earthquakes, though they are usually minor and pass without incident.