| 21. | The Philippine Institute of Volcanology and Seismology ( PHIVOLCS ) lists Mount Balungao as an inactive volcano.
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| 22. | These books brought volcanology to a far wider audience than previous works aimed at the scientific community.
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| 23. | Escher had a broad interest, but his research was mainly on crystallography, mineralogy and volcanology.
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| 24. | The Philippine Institute of Volcanology and Seismology provides a classification system for the volcanoes of the country.
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| 25. | Philippines Institute of Volcanology and Seismology ( Phivolcs ) lists Panay as " Inactive ".
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| 26. | In 2001 he became the head of the Geological Hazard Mitigation Division Volcanology and Geological Hazard Mitigation.
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| 27. | It incorporates exhibits on volcanology, archaeology and industrial history, with educational trails and information signs.
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| 28. | :: I learnt it elsewhere, but it is mentioned in the Volcanology of Io article.
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| 29. | But the Philippine Institute of Volcanology and Seismology doubts the volcano erupted because no tremors were recorded beforehand.
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| 30. | There were no casualties in the two blasts Thursday, the Philippine Institute of Volcanology and Seismology said.
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