Taal Volcano's main crater has resumed degassing of steam-rich plume after a pause of 16 days, the Philippine Institute of Volcanology and Seismology (Phivolcs) said on Wednesday, Aug. 11.
"Activity at the main crater was dominated by upwelling of hot volcanic fluids in its lake which generated plumes 3,000 meters tall that drifted to the general north. Sulfur dioxide (SO2) emission averaged 3,849 tonnes/day on 09 August 2021," Phivolcs said.
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However, Phivolcs noted that Taal Volcano will remain at Alert Level 2 due to "decreased unrest." It has been under this status since July 23, 2021.
In the past 24 hours, Taal had 107 volcanic earthquakes, including 100 volcanic tremor events having durations of two 30 minutes, six low-frequency volcanic earthquakes, and one hybrid event, including a low-level background tremor that has persisted since July 7, 2021.
"Based on ground deformation parameters from electronic tilt, continuous GPS and InSAR monitoring, Taal Volcano Island has begun deflating in April 2021 while the Taal region continues to undergo very slow extension since 2020," Phivolcs pointed out.
As Taal Volcano remains under Alert Level 2, it means that sudden steam- or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within and around the volcano island.
Phivolcs recommended that entry into Taal Volcano Island, Taal’s permanent danger zone, especially the vicinities of the main crater and the Daang Kastila fissure, as well as occupancy and boating on Taal Lake, must be strictly prohibited.