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Mt. Bulusan still restive

Mt. Bulusan in Sorsogon has continued its being restive as it as already generated 29 volcanic earthquakes accompanied by visible emission of white steam rising above the volcano’s vent.

This was based on a 24-hour observation period conducted by the Philippine Institute of Volcanology and Seismology (Phivolcs).

It said sulfur dioxide (SO2) emission was measured at an average of 102 tonnes/day last October 21.

SO2 emission tends to increase through time as magma degasses with increasing rates as it moves up from great depths beneath the volcano, it explained.

Alert Level 1 remains in effect over Mt. Bulusan, which means that the volcano continues to exhibit “abnormal” activities.

Phivolcs said hydrothermal processes are underway beneath the volcano, which may lead to more steam-driven eruptions. (Ellalyn B. De Vera)