|BULUSAN VOLCANO BULLETIN, 18 January 2011, 8:00 A.M.|
|Tuesday, 18 January 2011 08:22|
At around 2:58 A.M, today, an explosion occurred at the summit crater of Bulusan Volcano (12°46.2’N, 124°03’E). This was accompanied by a rumbling sound audible at Monbon, Irosin. The explosion was not observed because the volcano summit was covered by thick clouds. Field investigation conducted this morning confirmed the presence of traces of ash deposits in Monbon, Irosin.
Bulusan Volcano’s status remains at Alert Level 1. This means that the source of activity is hydrothermal and shallow. However, no entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strongly advised, 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. 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.