Ongoing Taal Volcano Tremors Raise Alert
Volcanic tremors continue to be recorded in Taal Volcano in Batangas province, officials reported on Monday morning, August 11, 2025. The Philippine Institute of Volcanology and Seismology (Phivolcs) confirmed that the increased seismic activity signals a possible escalation in volcanic unrest.
Phivolcs noted five volcanic tremors in the past 24 hours, lasting a combined seven hours and 30 minutes. Local volcanologists emphasized that these tremors are part of the ongoing volcanic activity at Taal Volcano, which has shown fluctuating seismic events over recent days.
Seismic Trends and Sulfur Dioxide Emissions
On Sunday alone, 19 volcanic earthquakes and 17 tremors were detected, a significant rise compared to just four earthquakes and one tremor recorded from August 1 to 9. Community members said this spike in seismic events demands close monitoring.
In addition to tremors, Phivolcs reported a moderate emission of sulfur dioxide (SO₂), measuring 374 metric tons from Taal’s main crater. This gas plume rose approximately 900 meters high, signaling increased volcanic gas release.
Increasing Seismic Energy and Volcanic Plume Observations
According to the latest advisory, Taal Volcano Network (TVN) stations recorded a rise in real-time seismic energy measurement (RSAM) alongside continuous volcanic tremors starting Sunday morning. Officials observed a moderate to voluminous plume emanating from the main crater concurrently with the RSAM increase.
Local leaders highlighted that since June, Taal has emitted low levels of sulfur dioxide, averaging 412 metric tons as recently as last Friday. This recent spike in both seismic energy and gas emissions suggests heightened volcanic activity.
Potential for Phreatic or Phreatomagmatic Eruption
Phivolcs warned that the sharp increase in RSAM and vigorous steaming from the crater may trigger a phreatic or minor phreatomagmatic eruption. Phreatic eruptions are steam-driven explosions caused when water beneath or on the surface is heated by magma or hot volcanic materials.
Taal previously experienced a 17-minute phreatic eruption on June 17, reminding residents of the volcano’s unpredictable nature. Community members urged vigilance given these signs of possible eruptive activity.
Alert Level and Safety Restrictions Remain
The agency reiterated that Alert Level 1 remains in effect for Taal Volcano, indicating an abnormal condition. They clarified that this level does not mean volcanic unrest has ceased or that the threat of eruption is over.
At this alert stage, sudden steam-driven or minor phreatomagmatic eruptions, volcanic earthquakes, minor ashfall, and dangerous volcanic gas expulsions may still occur, particularly within Taal Volcano Island (TVI). Officials stressed the importance of heeding these warnings to avoid hazards.
Strict Prohibitions on Access and Activities
Authorities maintain that entry to Taal Volcano Island, boating on Taal Lake, and flying aircraft near the volcano are strictly prohibited. These measures aim to protect residents and visitors from potential volcanic hazards amid ongoing unrest.
Local leaders urge everyone to stay informed and comply with safety protocols as Phivolcs continues to monitor the volcano’s activity closely.
For more news and updates on Taal Volcano tremors, visit Filipinokami.com.
