PHIVOLCS Mt Bulusan Update: Volcano continues ash explosion

By on Nov 8, 2010 in Announcement, Natural Disasters Comments
bulusan volcano
Image Credit: Flickr User Agapbulusan

In its 5pm Bulusan Volcano Update, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) said that Mt Bulusan in Sorsogon continues to spew ashes. This however is the usual behavior of this volcano during its restive period, according to PHIVOLCS. Alert Level 1 is still in effect, meaning no one is allowed within the 4km Permanent Danger Zone (PDZ).

Since Saturday’s ash explosion, the Bulusan volcano has continued to be restive as it emits white steam clouds and around 10 quakes during the past 24 hours. Four of the quakes registered were signs of volcanic explosion, according PHIVOLCS.

Here is the complete PHIVOLCS Bulusan Update as of 5:00 P.M., today, November 8, 2010:

Based on investigations of PHIVOLCS volcanologists, today’s 6:45AM explosion dispersed ash in the following areas of Sorsogon Province: Barangays Cogon, Gulang-gulang and Bolos in the municipality of Irosin and Sitio Caladgao, Barangay Bura-buran in the town of Juban. A Correlation Spectrometer (COSPEC) survey conducted indicated that the average sulphur dioxide (SO2) flux for today was 338 tonnes/day. After today’s ash explosion, Bulusan Volcano’s (12°46.2’N, 124°03’E) activities were limited to weak to moderate steaming and occurrence of two (2) volcanic earthquakes.

The recent ash explosions are more or less typical of Bulusan’s activity during its restive period. PHIVOLCS expects more explosions to occur in view of the volcano’s recent reactivation. Hence, Alert Level 1 is reiterated to reflect the present activity at Bulusan. Areas within 4 kilometers of the summit has been designated a Permanent Danger Zone (PDZ) which means that the public is strongly advised not to venture inside this area because it may be affected by sudden steam explosions. Meanwhile, the 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 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 aircraft. PHIVOLCS-DOST is closely monitoring Bulusan Volcano’s activity and any new significant development will be immediately posted to all concerned.

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