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|BULUSAN VOLCANO BULLETIN 25 November 2010 8:00 A.M.|
|Thursday, 25 November 2010 08:27|
After the 1:22 P.M. ash explosion yesterday, Bulusan Volcano’s (12°46.2’N, 124°03’E) seismic network recorded a total of eleven (11) volcanic earthquakes. Steaming activity varied from wispy to voluminous with white steam columns reaching a maximum height of 300-500 meters above the crater rim before drifting south-southwest to south. Yesterday’s measurement of sulfur dioxide (SO2) emission rate produced an average value of twenty two (22) tonnes per day.
Alert Level 1 remains in effect over Bulusan Volcano. The public is reminded not to venture inside the 4-kilometer radius Permanent Danger Zone (PDZ) because the area is at risk to sudden steam and ash explosions. Due to the prevailing wind direction, residents located in the northwest and southwest sectors of the volcano are advised to take precautions against ashfalls. Civil aviation authorities must also warn pilots to avoid flying close to the volcano’s summit as ejected ash and volcanic fragments from sudden explosions may pose hazards to aircrafts. Furthermore, residents near valleys and river/stream channels should be watchful against sediment-laden stream flows and lahars because ash and other loose volcanic materials may be remobilized during heavy and prolonged rainfall. DOST-PHIVOLCS is closely monitoring Bulusan Volcano’s activity and any new significant development will be immediately relayed to all concerned.