Bulusan volcano is situated in Sorsogon Province, 70 km southeast of Mayon Volcano and approximately 250 km SE
of Manila at 12°46.2'N, 124°03'E. Its top reaches 1.559m asl, the base of the volcano has a diameter of 15 kilometer.
It is now a stratovolcano formed insaide a caldera. There are several hotsprings around, and it has 4 craters,
with a fissure located below the crater that opened in 1984. This fissure is measuring 5 to 8 meter width and
about 100 m long.
There have been 16 historical eruptions, the last one from March to June in 2006.
Friday, November 26th, 2010
Clouds of ash from the Philippines Bulusan volcano forced thousands to flee their homes as the volcanic debris
damaged crops in Sorsogon province.
Officials warn that up to 80,000 residents in 70 villages could be
affected if Bulusans activity increases further.
Other schools that also adopted shifting schedules in the town included
Cogon Elementary School, Bolos Elementary
Wednesday, November 10th, 2010
Two episodes of ash explosions occurred at 3:30 PM and 3:43 PM yesterday from the crater of Bulusan Volcano.
The steam driven explosions produced grayish ash columns that reached heights of approximately 1000m and 800m, respectively, above the crater and drifted to the southwest. Both explosions were accompanied by rumbling sounds
heard at Barangay Monbon in Irosin.
Field investigation conducted by PHIVOLCS volcanologists yesterday confirmed that ashfall affected the following areas: Barangays Cogon (2.0mm), Tinampo (1.0mm), Monbon (1.0mm), town proper and Bolos (traces) in Irosin and
Barangay Sangkayon (traces) in Juban, all located in the SW and WNW sectors of the volcano.
Sulfur Dioxide (SO2) emission rate measured yesterday yielded a value of 168 tonnes per day. Prior to the explosions,
the seismic network detected two (2) volcanic earthquakes. For the past 24 hour observation period, steaming activity
varied from very weak to moderate.
Tuesday, November 9th, 2010
Bulusan Volcanos seismic network detected a total of eight (8) volcanic earthquakes during the past 24 hours.
The summit of the volcano was most of the time obscured by thick clouds.
However, during times of good visibility weak to moderate emission of white steam was observed.
Phivolcs said the average sulfur dioxide flux for Monday was 338 tons/day, following an ash explosion in the morning. The November 6 and 8, 2010 ash explosions are typical of Bulusan Volcanos activity during its restive period.
PHIVOLCS expects more explosions to occur in view of the volcanos recent reactivation.
Areas within 4 kilometers of the summit has been designated a Permanent Danger Zone.
Aircrafts are warned to come to near the volcano, in case of new explosions. Also preparations are being
made for quick evacuation of people, in case of lavaflows or pyroclastic flows.
Monday, November 8th, 2010
At 6:45 this morning, Bulusan Volcano produced another ash explosion from its summit crater.
The steam-driven explosion lasted for around five (5) minutes and produced a brownish to light grayish ash cloud,
which rose to about 700 m above the summit.
The seismic network around Bulusan Volcano recorded 28 volcanic earthquakes during the past 24 hours.
The recent ash explosions are more or less typical of
Bulusans activity during its restive period. PHIVOLCS expects
Bulusan is generally known for its sudden steam-driven or phreatic explosions. It is one of the most active volcanos in the Philippines, and after Mayon, Taal and Pinatubo is considered the 4th most active, having erupted 15 times since 1886.