The Taal Volcano, about 37 miles south of Manila on the island of Luzon, erupted in the afternoon.
Authorities ordered evacuations for three towns, according to CNN Philippines.
The agency raised its alert status to indicate the possibility of a hazardous eruption with lava within hours to days.
The state-run Philippines News Agency reported minor earthquakes.
Ma-an de Ocampo-Ignacio was on a plane approaching Manila when she captured a photo.
“It was fascinating to watch it,” Ocampo-Ignacio told CNN. “But now we’re getting to the business of finding out what the communities there need.”