Saturday, 27 June 2015 07:47

Bulusan Volcano’s (12°46.2’N, 124°03’E) seismic monitoring network recorded two (2) rockfall events during the past 24 hours. Moderate emmissions of white steam plumes, 100 meters high, that drifted towards the southeast were observed coming from the west-northwest and southwest vents. Precise leveling surveys on May 5-14, 2015 indicate very slight inflation of the volcano’s edifice relative to March 2015.

Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to more steam-driven eruptions. The local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ash from any sudden phreatic eruption can be hazardous to aircraft. Furthermore, people living within valleys and along river/stream channels especially on the southwest and northwest sector of the edifice 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 condition and any new development will be relayed to all concerned.