Mount Bulusan had increased volcanic activity in November 2010, spewing ash and steam over several days (the photo above is from Nov. 2010).

Eruption: A massive plume of ash spirals into the sky from the Mount Bulusan volcano The army sent trucks to move around 2,000 people to safety. UPDATE: The Philippine Institute of Volcanology and Seismology confirmed the ash explosion and says it was caused by steam buildup. It has a base diameter of 15 kilometers (km). Three small craters are located on the SE flank. Mount Bulusan is a stratovolcano, a cone-shaped volcano which has one or several summit craters. The summit of 1 565-m-high (5 134.5 feet) Bulusan volcano is unvegetated and contains a 300-m-wide (984.2 feet), 50-m-deep (164 feet) crater. Bulusan is flanked by several other large intracaldera lava domes and cones, including the prominent Mount Jormajan lava dome on the SW flank and Sharp Peak to the NE. Families were evacuated at the time.