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