MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (PHIVOLCS) issued a public advisory on Monday, January 6, warning of increased seismic activity in Taal Volcano that could potentially lead to a minor eruption.
According to Phivolcs, the Taal Volcano Network (TVN) recorded a significant rise in real-time seismic energy measurements (RSAM) on Taal Volcano Island (TVI) since Saturday, January 4, 2025.
Although only 12 volcanic earthquakes, including six tremor events, have been logged since January 1, the heightened RSAM levels are a cause for concern. Visual observations revealed no degassing plume from the Taal Main Crater during this period of increased activity.
This unusual absence, combined with sustained sulfur dioxide (SO2) emissions averaging 2,753 tons per day as of December 30, 2024, suggests a possible blockage in volcanic gas pathways, according to Phivolcs.
Such blockages could result in short-term pressurization, potentially triggering a phreatic or minor phreatomagmatic eruption.
Despite the activity, Taal Volcano remains under Alert Level 1, indicating an abnormal condition. Phivolcs emphasized that this does not signify reduced unrest or diminished eruption risk.
At Alert Level 1, sudden steam-driven eruptions, minor ashfall, volcanic earthquakes, and harmful accumulations of volcanic gases remain possible, posing threats to areas within TVI.
Communities around Taal Caldera are also warned of the long-term health risks posed by continuous SO2 emissions. Local government units are advised to monitor volcanic gas exposure in their areas and implement necessary precautions to protect residents.
Phivolcs strongly reiterated that entry into the Permanent Danger Zone (PDZ), including the Main Crater and the Daang Kastila fissure, is strictly prohibited.
The agency assured the public that it is closely monitoring Taal Volcano’s activity and will immediately issue updates on significant developments.
