Phivolcs

The Philippine Institute of Volcanology and Seismology (Phivolcs) raised the alert level of Bulusan Volcano in Sorsogon from 0 to 1 after recording 475 volcanic earthquakes since March 15. The activity signals a return to low-level unrest that could lead to phreatic or steam-driven eruptions.

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State volcanologists recorded 256 rockfalls at Mayon Volcano amid ongoing lava flows, the Philippine Institute of Volcanology and Seismology (Phivolcs) said. The volcano has been at Alert Level 3 since January 6. It also generated 41 pyroclastic density currents and elevated sulfur dioxide emissions.