Taal Volcano Shows Persistent Seismic Activity, Alert Level 1 Remains in Effect

LUCENA CITY — The Philippine Institute of Volcanology and Seismology (Phivolcs) reported sustained seismic activity at Taal Volcano, located in Batangas province, as of Monday morning, September 1. According to the agency's latest bulletin, Taal recorded 11 volcanic earthquakes within the last 24 hours, along with persistent volcanic tremors ongoing since August 27.

On the previous day, Sunday, five volcanic earthquakes were documented. Phivolcs explained that volcanic earthquakes result from magmatic or magma-related processes beneath or near the volcano. Volcanic tremors are described as continuous seismic signals exhibiting regular or irregular sine wave patterns with low frequencies ranging from 0.5 to 5 Hz.

These tremors may arise from several volcanic processes, including the resonance caused by magma moving through fissures and vents, closely occurring low-frequency quakes that merge signals, or volcanic explosions.

The agency further noted that Taal emitted approximately 4,514 metric tons of sulfur dioxide, and the volcanic plumes reached heights of up to 1,500 meters, categorizing the activity as a "voluminous emission." Despite these indicators, there has been no evidence of heated volcanic fluids rising in the Main Crater Lake, nor has volcanic smog (vog) been detected during the observation period.

Phivolcs reaffirmed that Taal Volcano remains at Alert Level 1, indicating an abnormal condition that still poses risks. The agency cautioned against interpreting the current state as the cessation of unrest or volcanic hazards.

At Alert Level 1, the possibility of sudden steam-driven or minor phreatic or phreatomagmatic eruptions exists. Additionally, volcanic earthquakes, ashfall, and hazardous accumulations or releases of volcanic gases may threaten the vicinity of Taal Volcano Island (TVI).

Accordingly, Phivolcs emphasized that access to the island, boating activities on Taal Lake, and flights in the immediate airspace near the volcano are strictly prohibited to ensure public safety.

Residents and visitors are advised to remain vigilant and adhere to official warnings as monitoring continues.