WATCH: Taal Volcano once again emits steam-rich plume

Published August 11, 2021, 11:31 AM

by Ellalyn De Vera-Ruiz


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.

Taal Volcano Aug 11 2021 0515H PST

LOOK: The Taal Main Crater resumes degassing of a steam-rich plume after a pause of 16 days. SO2 flux of 3849 tonnes/day was last measured on 9 August 2021. A total of 107 volcanic earthquakes was recorded over the past 24-hr observation period. Alert Level 2 currently prevails over Taal Volcano.

Posted by Philippine Institute of Volcanology and Seismology (PHIVOLCS-DOST) on Tuesday, August 10, 2021

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.