At least three people have died after a 7.8 magnitude earthquake hit the Philippines at 07:37 local time (23:37 GMT).
The quake struck off the coast of General Santos City in Mindanao - the Philippines' main southern island.
Five people have also been injured in the quake, police say.
Several countries in the region, including the Philippines, Indonesia and Japan, issued tsunami warnings but most have now been lifted.
The quake had a depth of 10km, says the Philippine Institute of Volcanology and Seismology.
Multiple aftershocks - at least 16 of them - have been recorded since the initial quake that struck off the coast of the southern Philippines at 07:37 local time (23:37 GMT).
These range from magnitudes of 1.3 to 6.7, according to the Philippine Institute of Volcanology and Seismology.
Philippines President Ferdinand Marcos Jr says he has "directed all relevant government agencies to act immediately", urging people to move to higher ground.
General Santos, one of the areas worst-hit by today's earthquake, is known as the country's tuna capital, because of the southern port city's bountiful supplies of the fish.
It is also known as the hometown of Manny Pacquiao, the world boxing champion who was later elected congressman and senator.
Tsunami waves have been recorded in Palau, Davao in the Philippines and Northern Sulawesi province in Indonesia, according to the US Geological Survey.
The waves in two areas of Palau measured 0.1ft (3cm). In two locations in Northern Sulawesi, the waves measured 0.3ft (9cm) and 2.7ft (0.8m). As for Davao, a 1.5ft (0.5m) wave was recorded.
Meanwhile, a tsunami advisory issued earlier for Guam and Northern Mariana Islands has been cancelled, the USGS said in an update.
Australia has cancelled its tsunami watch after the earthquake in the Philippines.
The Joint Australian Tsunami Warning Centre had initially warned there was a “potential tsunami threat" Christmas Island and Northern Territory.
Meanwhile New Zealand authorities say "the initial assessment is that the earthquake is unlikely to have caused a tsunami that will pose a threat to New Zealand".
