BULUSAN VOLCANO UPDATE 16 November 2010 8:00 A.M. PDF Print
Tuesday, 16 November 2010 09:51

Another ash explosion accompanied by rumbling sounds occurred at 11:47 last night from the summit crater of Bulusan Volcano (12°46.2’N, 124°03’E). The event was reflected by the seismograph as an explosion-type quake lasting for four (4) minutes and 30 seconds. The height of the ash column was not observed due to darkness.  Ashfalls were experienced at barangays Bolos, Gulang-gulang, Tinampo and Monbon, Municipality of Irosin.  The seismic network detected fifty (50) volcanic earthquakes during the past 24 hours. Prior to the activity, weak emission of white steam clouds was observed from the crater and the NW vents. Yesterday’s sulfur dioxide measurement yielded an average value of 38 tonnes per day.

The status of Bulusan Volcano remains hoisted at Alert Level 1.  The public is strongly advised not to enter inside the 4-kilometer radius Permanent Danger Zone (PDZ) because it may be affected by sudden steam explosions.  People residing near valleys and streams are also advised to be vigilant against sediment-laden stream flows in the event of heavy and continuous rainfall.  Due to the prevailing wind direction, residents located in the northwest and southwest sectors of the volcano are advised to take precautions against ashfalls.  Civil aviation authorities must advise pilots to avoid flying close to the volcano’s summit as ejected ash and volcanic fragments from sudden explosions may pose hazards to aircrafts.  PHIVOLCS-DOST is closely monitoring Bulusan Volcano’s activity and any new significant development will be immediately posted to all concerned.