31. The Philippines Institute of Volcanology and Seismology ( PHIVOLCS ) lists Binuluan or Ambalatungan as an inactive volcano. 32. The Philippine Institute of Volcanology and Seismology ( PHIVOLCS ) lists Mount Natib as a potentially active volcano. 33. He became the Head of Physical Volcanology at the Volcano Analysis Division Volcanological Survey in Indonesia in 1993. 34. Eruptions on Babuyan Claro is determined as probably strombolian or phreatomagmatic by the Philippine Institute of Volcanology and Seismology. 35. In Trevor's volcanology laboratory, a device shows activity on Sn�fell, a dormant volcano in Iceland. 36. Isopach maps are utilized in hydrographic survey, stratigraphy, sedimentology, structural geology, petroleum geology and volcanology . 37. Mount Balungao is listed as an inactive volcano by the Philippine Institute of Volcanology and Seismology ( PHIVOLCS ). 38. It was unlikely that Mount Parker erupted, according to Raymundo Punongbayan of the Philippine Institute of Volcanology and Seismology. 39. It was unlikely that Mount Parker erupted, according to Raymundo Punongbayan of the Philippine Institute of Volcanology and Seismology. 40. More tremors have been registered since Saturday, said Mas Atje Purbawinata, an official at the local volcanology office.
