The quake struck in Batangas province on the main island of Luzon at a depth of 114 kilometres (70 miles) at 7:43 am local time (2343 GMT), according to USGS.
The agency initially said the quake's strength was 6.2 and 108 kilometres deep.
In the coastal city of Calatagan, about 90 kilometres south of Manila and near the epicentre, people attending mass remained calm as the earthquake hit, police chief Major Carlo Caceres told AFP.
"There was a pause in the church service, but the people did not panic," Caceres said.
"This area is quake-prone and people are more or less used to them."
There were no reports of damage or casualties in the area, he added.
"The office furniture and equipment swayed, but nothing was broken," said policeman Allan Megano in the nearby town of Balayan.
The Philippines is situated on the Pacific "Ring of Fire", an arc of intense seismic activity that stretches from Japan through Southeast Asia and across the Pacific basin.
| The content herein, unless otherwise known to be public domain, is Copyright 1995-2026 Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principles for news reporting and research purposes. |