May 2015 – MANILA – The Philippine Institute of Volcanology and Seismology (Phivolcs), in its 1:30 p.m. advisory Friday, disclosed that Bulusan Volcano (12.7667°N, 124.0500°E) situated in Sorsogon Province, produced a steam and ash explosion which lasted for 5 minutes based on seismic records. The volcanic activity was recorded at 8:09 a.m., although it may not have been observed visually due to thick rain clouds covering the summit. “At around 10:30 a.m., when the crater became visible, strong to moderate, dirty white steaming was observed, reaching 200 meters high and drifting west-northwest coming from the northwest vent of the volcano,” Phivolcs said.
Only five (5) volcanic earthquakes were detected during the past week by the Bulusan seismic network, but after the steam and ash explosion, the network recorded approximately 40 volcanic earthquakes. Alert Level 0 status currently prevails over Bulusan Volcano, Phivolcs added. However, local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) remains 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 ejecta from any sudden phreatic eruption can be hazardous to aircraft. “Furthermore, people living within valleys and along river/stream channels should be vigilant against sediment-laden stream flows and lahars in the event of heavy and prolonged rainfall,” Phivolcs underscored. –Inter Aksyon