(Eagle News) — The Philippine Institute of Volcanology and Seismology has raised the alert level over Taal. In an advisory on Tuesday, March 9, PHIVOLCS said the raising of the alert level from alert level 1 to 2 was because the volcano has been exhibiting increased unrest since Feb. 13. For instance, PHIVOLCS said the Taal Volcano Network (TVN) recorded a total of twenty-eight volcanic tremor episodes, four low-frequency volcanic earthquakes, and one hybrid earthquake […]