Monday, 30 May 2016 07:35

Bulusan Volcano’s seismic monitoring network recorded one (1) volcanic earthquake during the past 24 hours. Weak emission of white steam plumes that rose up to 100 meters and drifted southwest was observed. Precise leveling survey results from April 27 to May 5, 2016 indicated slight deflationary changes of the edifice relative to February 2016, consistent with the measurements from continuous GPS data as of 30 April 2016.

Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are ongoing beneath the volcano that may lead to steam-driven eruptions. The local government units and the public are reminded that entry into 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 or 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.