Several southern cities and provinces were rocked by the quake, the government institute said, adding that it was expecting aftershocks.
CALIFORNIA EARTHQUAKE ON NEW YEARS DAY DAMAGES AT LEAST 20 APARTMENTS
No immediate injuries or major damage were reported when an earthquake with a magnitude of 6.1 struck southeastern Philippines Wednesday.
Davao de Oro Gov. Dorothy Gonzaga suspended classes and most government work in the province on Thursday to allow inspections of buildings for possible damage. The province of more than 700,000 people lies in a region that was still reeling from heavy rains and flooding last week.
The Philippines lies along the Pacific "Ring of Fire," an arc of faults around the Pacific Ocean where most of the world’s earthquakes occur. It is also hit by about 20 typhoons and tropical storms each year, making it one of the world’s most disaster-prone countries.
A magnitude 7.7 quake killed nearly 2,000 people in the northern Philippines in 1990.