| 11. | Volcanology has always been a hobby of mine.
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| 12. | Philippine Institute of Volcanology and Seismology ( PHIVOLCS ), list Mount Arayat as Inactive.
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| 13. | Steve Sparks has been hugely influential in the fields of both volcanology and igneous petrology.
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| 14. | Primary disciplinary fields involved in the research project were archeology, botany, and volcanology.
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| 15. | But the danger has not passed, according to the Philippine Institute of Volcanology and Seismology.
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| 16. | The Philippine Institute of Volcanology and Seismology said they recorded the vigorous ejection of molten rocks.
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| 17. | A passionate collector of orchids, his other hobbies included volcanology, mineralogy, and mycology.
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| 18. | His research area was mainly volcanology.
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| 19. | He made significant contributions to geomorphology and Mesozoic palaeontology, as well as volcanology and stratigraphy.
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| 20. | Seismic activity in Indonesia is monitored by the Directorate of Volcanology and Geological Hazard Mitigation, Indonesia.
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