An earthquake of magnitude 6.1 struck Mindanao island in the Philippines at 9:23 a.m. local time on Tuesday, according to the United State Geological Survey (USGS).
The quake registered from a depth of 19 km (11 miles), the agency said.
Tremors started in the region an hour before the large quake, according to monitoring by the Philippine Institute Of Volcanology And Seismology.
A series of aftershocks followed, with the largest being of 5.2 magnitude at 12:24 p.m.
Minutes later to the south west, another earthquake measuring 6.0 of the Richter scale struck Tonga in the south Pacific.
Earlier in the day, a 5.3 magnitude quake was reported in Japan at 8:16 a.m. local time.
Tonga, the Philippines, and Japan all sit along the Pacific Ring of Fire, which is frequented by volcanic eruptions and earthquakes.