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 10:52 AM | BY: T
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.
The frequency of earthquakes decreased to baseline levels of 0-2 per day, measurements indicated deflation since late November 2011, and steaming activity from the crater and known thermal vents had been frequently weak compared to more moderate steam emissions during periods of unrest.
Entry into the permanent danger zone, defined by a 4-km radius around the volcano, remained prohibited.
Friday, Feb 24, 2012
No eruptions have occurred at Bulusan volcano in recent weeks, and signs of unrest have decreased compared to end of December last year. Nevertheless, the Philippine Institute of Volcanology and Seismology (PHILVOLCS) keeps the volcano at alert level 1 (unrest, eruptions possible within weeks to months). ... [more]
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. ... [more]
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. ... [more]
Tuesday, Jul 31, 2007
After several months of quietness, Bulusan erupted again with a powerful phreatomagmatic ash eruption. Philvolcs reports: ... [more]
Thursday, May 31, 2007
Scientists from PHIVOLCS conducted an aerial investigation of Bulusan and discovered lahar deposits and three steaming fissures. Scientists also observed steam plumes that rose to altitudes of 1.6-1.7 km.[more]