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Awareness and Preparedness
|BULUSAN VOLCANO BULLETIN 23 December 2010 5:00 P.M.|
|Thursday, 23 December 2010 17:55|
At 9:16 A.M. today, an ash explosion occurred at the summit crater of Bulusan Volcano (12°46.2’N, 124°03’E). A grayish steam and ash column rose to about 500 meters above the crater rim and drifted south-southwest. The event was recorded as an explosion type volcanic earthquake preceded by a tremor type volcanic earthquake that lasted for thirty minutes and fifty seconds. Field investigation carried out immediately after the explosion showed that no ashfall was observed beyond the 4-km Permanent Danger Zone (PDZ).
Alert Level 1 remains enforced over Bulusan Volcano area. The public is strongly advised not to enter the 4-kilometer radius Permanent Danger Zone (PDZ) because the area is at risk to sudden steam and ash explosions. Because of the prevailing wind direction, people residing in the northwest and southwest sectors of the volcano are reminded 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 vigilant against sediment-laden stream flows and lahars in the event of heavy and continuous rainfall. DOST-PHIVOLCS is closely monitoring Bulusan Volcano’s activity and any new significant development will be immediately relayed to all concerned.