A minor phreatic eruption and four volcanic tremors were recorded at Taal Volcano in Batangas over a 24-hour period, according to a report released Friday by the Philippine Institute of Volcanology and Seismology (Phivolcs).

 

The brief eruption, which lasted around four minutes, was accompanied by four volcanic tremors ranging from one to seven minutes in duration.

 

Phivolcs explained that phreatic eruptions are steam-driven events caused when underground or surface water comes into contact with hot volcanic material like magma or rocks. These can occur without warning and often produce ash and gas.

 

Meanwhile, volcanic tremors are prolonged seismic signals that indicate underground movement, often lasting more than a minute and marked by low-frequency vibrations.

 

In addition to the seismic activity, Taal released approximately 3,369 tons of sulfur dioxide—an increase compared to the previous day. The volcano also produced a 1,500-meter-high plume that drifted northwest. Phivolcs described this as a “voluminous emission.”

 

Observations also noted continued long-term deflation of the Taal Caldera, paired with short-term inflation on the southeastern flank of the volcano island—signs that pressure may be building underground.

 

Phivolcs reminded the public that possible hazards include:

• Steam or gas-driven explosions

• Volcanic earthquakes

• Light ashfall

• Dangerous buildup or release of volcanic gases

 

Alert Level 1 remains in effect, signaling low-level unrest. While there’s no immediate threat of a full-scale eruption, the public is strongly advised to stay out of Taal Volcano Island, especially around the Main Crater and Daang Kastila fissures. Boating on Taal Lake is also prohibited for safety reasons.