The Philippine Institute of Volcanology and Seismology (Phivolcs) on Friday, July 23, said it detected a total of 95 earthquakes in Taal Volcano in the past 24 hours.
Of the 95 earthquakes, 88 were volcanic tremor events having durations of one to 17 minutes, 26 low-frequency volcanic earthquakes, and one hybrid earthquake, including a low-level background tremor that has persisted since July 7.
Phivolcs continues to observe “high” levels of volcanic sulfur dioxide or SO2 gas emissions that triggered steam-rich plumes up to 900 meters above the Taal’s main crater.
As of July 20, the average SO2 emission of Taal Volcano was measured at 5,286 tonnes. Its record-high sulfur dioxide emission was 22,628 tonnes on July 4.
Phivolcs said that Taal Volcano remains at Alert Level 3 due to continuous “magmatic unrest.” It has been under this status since July 1.
“At Alert Level 3, magma extruding from the main crater could drive explosive eruption,” Phivolcs said.
The public is prohibited from entering the entire Taal Volcano Island, which is a permanent danger zone.
Phivolcs also advised those in the high-risk barangays of Agoncillo and Laurel in Batangas to remain in evacuation centers due to hazards of pyroclastic density currents and volcanic tsunami in case of strong eruptions.
“All activities on Taal Lake should not be allowed at this time,” it added.
Communities around the Taal lakeshores were also advised to remain vigilant and take precautionary measures against possible airborne ash and vog.
Phivolcs asked residents around Taal Lake to “calmly” prepare for possible evacuation should Taal Volcano’s unrest intensifies.