LEGAZPI CITY–An “explosion-type” earthquake was recorded by the Philippine Institute of Volcanology and Seismology in Bulusan Volcano in Sorsogon Friday night.
In its latest bulletin, Phivolcs said that the quake occurred at around 7:27 p.m. and lasted for about 11 minutes. Clouds, however, prevented state volcanologists to visually observe it.
The statement did not say what distinguished an “explosion-type” earthquake from any other volcanic tremor.
Sulfur dioxide emission rate was measured at 13 tons per day.
About 11 volcanic quakes were also recorded by the seismic network around the volcano during the past 24-hour observation period.
Phivolcs said Bulusan’s status remained at alert level 1 and the public was reminded not to venture into the four-kilometer permanent danger zone as sudden steam and ash explosions may occur.