Bulusan volcano news:
Bulusan volcano (Philippines): phreatic explosions
Thursday May 07, 2015 08:32 AM | DOOR: T
New, sporadic explosions have occurred at the volcano since 1 May, ejecting small plumes of ash. PHILVOLCS raised the alert level to 1 and an exclusion zone of 4 km around the volcano is in place.
According to the monitoring volcanologists, the activity has been phreatic in origin, i.e. caused by overheated ground-water rather than fresh magma at the surface.
The first eruption was detected by its seismic signal and fine ash fall observed on the western and northwestern side of the volcano in the villages of Gulang-Gulang (6.5 km distance) and Sangjayron (11 km distance).
New ash emissions occurred last night. According to PHILVOLCS, an explosion from a vent on the northwestern slope of the volcano lasted 3:30 minutes and produced an ash plume that rose 250 m and drifted to the west. Ash falls occurred in the small town of Irosin, about 7.5 km southwest of the summit.
Authorities decided to evacuate the nearest villages, especially Cogon. More than 1,100 people were evacuated during the last hours and relocated to the building of the Gallanosa high school at Irosin.
For the time being, volcanologists do not think that a more intense eruptive phase is likely to follow, but that the volcano rather might undergo a phase of similar phreatic explosions until its hydrothermal system is again in equilibrium, a typical behavior of the volcano in the historic past. Eruptions last occurred in 2006-07 and 2010-11, sometimes producing quite large ash plumes.
Monday, Jul 14, 2014
There are signs the volcano is becoming restless again. PHIVOLCS detected an increase in seismic activity and slight deformation of the volcanic edifice. ... [meer...]
Bulusan volcano (Luzon Island, Philippines) activity update: decline in activity since last phreatic eruption in May 2011, alert lowered to normal
Thursday, May 03, 2012
PHIVOLCS reported that the Alert Level for Bulusan was lowered to 0 (on a scale of 0-5) on 24 April following a decline in activity after a phreatic eruption on 13 May 2011. ... [meer...]
Bulusan vulkaan (Filipijnen), activiteit update: stomen, lichte deflatie, niveau blijft alert op 1 (onrust)
Friday, Feb 24, 2012
Geen uitbarstingen in recente weken op de Bulusan vulkaan hebben voorgedaan, en tekenen van onrust zijn gedaald in vergelijking met eind December vorig jaar. Niettemin, de Philippine Institute of Volcanology and Seismology (PHILVOLCS) houdt de vulkaan bij alarmniveau 1 (onrust, uitbarstingen mogelijk binnen weken tot maanden). ... [meer...]
Tuesday, Dec 27, 2011
Bulusan volcano (Philippines) could be close to a new eruption. The volcano has been showing increased seismic activity and slight inflation on the NNE flank during the past 2 weeks, the Philippine Institute of Volcanology and Seismology (PHILVOLCS) reports. ... [meer...]
Monday, Feb 21, 2011
Early on 20 June, a new series of ash eruptions started at Bulusan volcano, producing a 3 km / 9,800 feet high plume. Ashfall spread to as far as 30 km away in Masbate and the noise from the explosion was heard up to 10 km from the volcano. ... [meer...]