THE Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported on Monday a rise in real-time seismic energy measurement (RSAM) at Taal Volcano since January 4.
The agency noted the absence of a degassing plume from the volcano’s main crater during this period of heightened RSAM.
For the past four years, Taal has emitted sustained levels of sulfur dioxide (SO₂), with the most recent measurement recorded on December 30, 2024, averaging 2,753 tonnes per day.
According to PHIVOLCS, the sharp RSAM increase, coupled with the lack of visible degassing, could indicate a blockage in gas pathways within the volcano.
This condition might cause short-term pressurization, potentially leading to a phreatic or minor phreatomagmatic eruption.
Since January 1, PHIVOLCS has detected 12 volcanic earthquakes, including six tremor events. Despite the activity,
Alert Level 1 remains in effect, signaling an abnormal condition that could still result in hazardous events.
“At Alert Level 1, sudden steam-driven or phreatic eruptions, minor ashfall, volcanic earthquakes, and dangerous accumulations or expulsions of volcanic gases can threaten areas within Taal Volcano Island (TVI),” the agency warned.
Communities around Taal Caldera continue to face long-term health risks due to exposure to high concentrations of volcanic sulfur dioxide.
PHIVOLCS reiterated that entry into Taal Volcano Island and its permanent danger zone remains prohibited, and the area is designated a no-fly zone.