Increased seismic activity detected at Bulusan, Kanlaon

The Philippine Institute of Volcanology and Seismology (Phivolcs) has reported a surge in seismic activity at Bulusan and Kanlaon volcanoes over the past few days, based on advisories issued on Monday, May 12.

- BY ELLALYN DE VERA RUIZ

Phivolcs said Bulusan Volcano recorded 309 volcanic earthquakes since midnight on May 8.

Of these, 287 were classified as volcano-tectonic earthquakes, linked to rock fracturing at depths of less than four kilometers beneath the volcano’s southeastern flank.

The remaining 22 were low-frequency volcanic earthquakes, associated with fluid movement beneath the surface.

Weak to moderate degassing from active vents was observed when weather conditions allowed visibility.

“These changes in parameters may indicate shallow hydrothermal activity of Bulusan Volcano,” Phivolcs said.