Hanoi (VNA) - The Philippine Institute of Volcanology and Seismology on October 25 raised the alert level over Bulusan Volcano in Sorsogon province, southeast of Manila, after recording 121 volcanic earthquakes since October 14.
The level was raised from zero to 1, which means the volcano is currently in a state of low-level unrest.
Of the 121 volcanic earthquakes, the institute said 37 were volcano-tectonic earthquakes associated with rock fracturing processes at the depths of 1 - 9km beneath the northwestern and southeastern slopes of the mountain.
The institute warned people to stay away from a 4km radius of the danger zone. It also urged vigilance in the 2km extended danger zone in the southeast due to the increased possibilities of sudden and hazardous phreatic eruptions.
Bulusan Volcano is 70km southeast of Mayon Volcano, the most active one in the Philippines, in Albay province. Mayon has been quietly erupting since June this year and continues to be on Alert Level 3 on a scale of five, with a "potential explosive activity"./.
The level was raised from zero to 1, which means the volcano is currently in a state of low-level unrest.
Of the 121 volcanic earthquakes, the institute said 37 were volcano-tectonic earthquakes associated with rock fracturing processes at the depths of 1 - 9km beneath the northwestern and southeastern slopes of the mountain.
The institute warned people to stay away from a 4km radius of the danger zone. It also urged vigilance in the 2km extended danger zone in the southeast due to the increased possibilities of sudden and hazardous phreatic eruptions.
Bulusan Volcano is 70km southeast of Mayon Volcano, the most active one in the Philippines, in Albay province. Mayon has been quietly erupting since June this year and continues to be on Alert Level 3 on a scale of five, with a "potential explosive activity"./.
VNA
