The activity of the volcano remains unchanged – seismic unrest and degassing activity continue at elevated levels, indicating that magma is moving and accumulating underneath the surface and might cause new eruptions at any time.
On 22 May PHIVOLCS’s surveillance cameras observed increasingly gas-steam plumes rising from the crater lake which rose 5,000 ft (1,500 m) above the Main Crater and drifted southwest.
On 21 May, sulfur dioxide (SO2) emissions reached to a 3426 tonnes/day.
The Main Crater Lake temperature reached to a 71.8°C with a pH of 1.59 on 4 March caused by volcanic gas reaching the shallow hydrothermal system that feeds into the lake accompanied by degassing.
Ground deformation parameters from electronic tilt, continuous GPS and InSAR monitoring continue to record a very slow and steady inflation and expansion of the Taal region that began after the January 2020 eruption.
Source: Phillippine Institute of Volcanology and Seismology volcano activity update 24 May 2021
Emissions of steam and gases rose 1,5 km above the Main Crater Lake (source: PHIVOLCS webcam)
Activity at the Taal Main Crater in the early morning of 22 May 2021. Upwelling of hot volcanic fluids at the Main Crater Lake has been observed to form steam plumes, vertical jets and even water spouts when cool air or rainwater is upon the lake surface. (1/5) pic.twitter.com/AFdANO6nCN
— PHIVOLCS-DOST (@phivolcs_dost) May 22, 2021