Recent Activities:
March - June, 2006
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) declared Alert Level 1 on March 19, 2006 after it recorded increased seismic unrest. On June 8, 2006, volcanologists raised the Alert Level to 2 (moderate level of seismic unrest) after it spewed ash. On June 9, the resulting ash cloud damaged a number of houses in the nearby town of Casiguran, 5 kilometers (3.1 mi) north of the volcano, and reached Sorsogon City, about 20 kilometers (12 mi) north of Bulusan.
On June 13, 2006, volcanologists said new craters were created by the mild explosions of Mount Bulusan. Aside from the new craters, two of the volcano's four craters appeared to have merged and cracks were observed on the crater on the western side of the summit. Another eruption took place on April 8, 2007.
July – October, 2007
On October 4, 2007, two episodes of ash explosions occurred as recorded by the seismic network. The explosions were not visually observed due to thick clouds covering the volcano's summit. The events were recorded as explosion type-earthquakes at 1:34 AM and 1:39 AM. The seismic network recorded
40 volcanic earthquakes and 8 short duration harmonic tremors during the previous 24 hours. Ground deformation surveys along the Inlagadian leveling line at the northeast flank indicated a slight inflation of the volcano's edifice. Field investigation conducted showed trace to light ashfalls affecting barangays San Roque, San Rafael, Sitio Tawog of Porog, Porog proper and Bulusan town proper, all in the municipality of Bulusan.Following some signs of volcanic activity, on the morning of July 31, 2007, 9.37 AM (local time), there was a loud explosion described by locals as like a bomb going off. A cloud of steam and ash shot into the air from Mount Bulusan to a height of 5 kilometers (3.1 mi), drifted and deposited over the surrounding countryside. The eruption lasted for 20 minutes.
The October 2007 ash explosions at Bulusan Volcano were preceded by sporadic swarms of small to moderate-sized amplitude earthquakes, which began occurring in the last week of September 2007. Evacuations took place during the July–August episodes of activity.
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| Mount Bulusan in active mode on February 2007 |
The October 2007 ash explosions at Bulusan Volcano were preceded by sporadic swarms of small to moderate-sized amplitude earthquakes, which began occurring in the last week of September 2007. Evacuations took place during the July–August episodes of activity.
October, 2010
On November 7, 2010, PHIVOLCS recorded increased seismic activity at Bulusan Volcano, 24 hours after the active volcano spewed a 600-meter (2,000 ft) ash column and grayish steam on November 5, 2010. State volcanologists noted that at least 10 volcanic earthquakes and four explosion-type events have been documented subsequent to the emission of ash and steam at 8 a.m. on Saturday (5 November 2010). PHIVOLCS also noted that steaming activity was characterized by strong emission of white steam column that reached a maximum height of 200 meters above the crater rim. It warned the public not to enter the four-kilometer permanent danger zone from the volcano. People residing near the valleys and streams were also advised to be "extra alert" against sediment-laden stream flows in the event of heavy rains. More ash ejection were reported on November 8–9, 2010 with ash fall on areas in Juban and Irosin towns in Sorsogon province. A PHIVOLCS bulletin on November 9, 2010 stated that eight volcanic earthquakes were recorded from the volcano during the past 24 hours and weak to moderate emission of ash explosion was observed. PHIVOLCS also warned residents near valleys and streams against sediment-laden stream flows in the event of heavy and continuous rainfall.
February, 2011
After months of little activity, the volcano suddenly erupted and sent a plume of ash 2 kilometers (1.2 mi) high, after water reacted with the hot magma. PHIVOLCS has said such explosions are likely to continue for the coming weeks. Initially, hundreds of nearby residents evacuated on their own, but the government has stepped in to evacuate thousands more, and imposed a 4-kilometer (2.5 mi) travel ban around the crater. They also advised airplanes to avoid the immediate perimeter due to ash and debris in the air.
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| Bulusan Volcano from rice fields of Bulusan |
July, 2014
In July 13, 2014, during the 24-hour observation period, the seismic network detected thirteen volcanic earthquakes.
Here is the summary of Mt. Bulusan's eruptions:
Sources:
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