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188    Asia



               Table 13.1  The active volcanoes of the Philippines

               Name                        Location                   Number of historical eruptions
               Mayon                       Legaspi City, Albay        45
               Taal                        Talisay, Batangas          33
               Kanalaon                    Negros Oriental            25

               Bulusan                     Sorsogon                   12
               Ragang                      Cotobato                     9
               Smith                       Babuyan Island               8
               Hibok-Hibok                 Camiguin Island              6

               Didicas                     Babuyan Island Group         5
               Babuyan Claro               Babuyan Island               4
               Carmiguin de Babuyanes      Babuyan Island Group         1
               Cagua                       Cagayan                      2

               Banahaw                     Laguna / Quezon            Unknown
               Calayo                      Valencia, Bukidnon           3
               Iraya                       Batanes                      1
               Pinatubo                    Zambales                     1

               Iriga                       Iriga, Camarines Sur         2
               Biliran                     Biliran                      1
               Bud Dajo                    Jolo Island                  1
               Matutum                     Cotobato                     1

               Kalatungan                  Bukidnon                   Unknown
               Makaturing                  Lanao, Mindanao            10
               Parker                      South Cotobato               3
               Source: Modified after Sigurdsson et al, 2000



               lost  their  lives,  the  government  created  the   most modern observation techniques and methods.
               Commission  on  Volcanology,  which  was  the   This survillance is geophysically based on seismic
               predecessor of the current Philippine Institute of   monitoring,  on  geodetic  methods  (electronic
               Volcanology  and  Seismology  (PHIVOLCS).   distance  measurement,  precise  levelling  and  tilt
               Another important impetus to the further scientific   measurements),  and  on  the  analysis  of  volcanic
               investigation  and  monitoring  of  Philippine   gases and visual observations.
               volcanoes was the plinian eruption of Mt Pinatubo   There are 22 active and 88 currently inactive
               in June 1991 (Newhall et al, 1996). PHIVOLCS   volcanoes in the Philippines at the present count.
               runs  a  programme  of  surveillance  of  all  active   The currently active volcanoes of the Philippines
               volcanoes  in  the  archipelago  that  includes  the   are shown in Table 13.1.







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