Rescuers are searching ruined buildings in the southern Philippines to ensure no one was still trapped a day after the strongest earthquake to hit the country in a half-century killed at least 37 people and displaced more than 20,

A full-scale earthquake test suggests a new generation of low-carbon timber-based buildings could remain usable after major shaking.

The 7.8-magnitude quake struck Monday about 12 miles off Sarangani province and triggered tsunami warnings across several countries.