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