|BULUSAN VOLCANO BULLETIN, 23 February 2011, 8:00 A.M.|
|Tuesday, 22 February 2011 23:04|
For the past 24 hours, seismic observation at Bulusan Volcano (12°46.2’N, 124°03’E) revealed the occurrence of one (1) volcanic earthquake. Steaming activity from the crater and known thermal vents was not observed due to thick clouds that covered the upper slope of the volcano during the past observation period. No other significant volcanic activity was observed since the 21 February 2011 ash explosion.
Bulusan Volcano’s status remains at Alert Level 1. This means that the source of activity is hydrothermal and shallow. Entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited, since the area is at risk to sudden steam and ash explosions. Due to the prevailing wind direction, residents 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 be hazardous to aircraft. If possible aircraft should avoid flying on the western side of the volcano as volcanic debris are likely to be carried in this direction by the prevailing winds. Furthermore, people living near valleys and river/stream channels should be vigilant against sediment-laden stream flows and lahars in the event of 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.