A 6.5-magnitude earthquake hit Indonesia's North Sulawesi province on Saturday just south of the Philippines.
There were no immediate reports of injury and damage.
The quake was centred 117km northeast of Melonguane, off the coast of Sulawesi Island. It was recorded at a depth of 10km under the sea.
The Indonesian archipelago sits on the so-called Pacific Ring of Fire where continental plates meet, causing frequent seismic and volcanic activity.