A volcano in the central Philippines shot clouds of grayish ash and steam four kilometers high Saturday, but residents were in no immediate danger from the eruption, volcanologists said. It was the sixth eruption of the 1,560-meter Mount Bulusan this year, said Espie del Mundo of the Philippine Institute of Volcanology and Seismology. "This is usually just ash, so the only hazard is from ash," such as respiratory ailments, del Mundo said. The volcano erupted around 10:30 a.m. (0230 GMT) and winds first blew the ash plume toward the southwest and later shifted to the north, volcanologists said. Bulusan, about 390 kilometers southeast of Manila, is one of the 22 active volcanos in the Philippines.