A 6.0-magnitude quake struck off the eastern coast of the Philippines on Saturday, the U.S. Geological Survey said, but no tsunami warning was immediately issued.
The quake hit at 9:09 pm local time (13:09 GMT) off the island of Samar, at a depth of 60 kilometers around 100 kilometers north of the city of Guiuan, USGS said.
The epicenter was around 600 kilometers east of the capital Manila, according to USGS.
Philippine seismologists measured the quake at a much-weaker 4.7-magnitude, said Alex Flores, duty officer at the operations center of the government's National Disaster Risk Reduction and Management Council.
"They are expecting neither damage nor aftershocks," Flores told Agence France Presse.
The council had not monitored any reports of casualties or damage, she added.
Officials at the state Philippine Institute of Volcanology and Seismology could not be reached for comment on Saturday night.
The Philippines sits on the Pacific "Ring of Fire" -- a belt around the Pacific Ocean where friction between shifting tectonic plates causes frequent earthquakes and volcanic activity.
A moderate 5.0-magnitude earthquake in November left at least 10 people injured when it hit a city in the southern Philippines.
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