Taal (Philippines) - Report for 17 November-23 November 2021

PHIVOLCS reported that unrest at Taal continued during 17-23 November.
Sulfur dioxide emissions continued to be elevated, averaging 6,643-12,168 tonnes/day.
Upwelling hot volcanic fluids were visible in the crater lake, and daily gas-and-steam plumes rose 1-3 km above the lake and drifted WNW, WSW, and SW.
Low-level background tremor persisted along with 5-30 volcanic earthquakes per day, 2-4 low-frequency volcanic earthquakes per day, and 1-23 daily episodes of volcanic tremor, each lasting 1-5 minutes.
One hybrid earthquake was recorded during 19-20 November and three were detected during 22-23 November.
No earthquakes were recorded for a period during 18-19 November.
Three short (1-5 minutes) phreatomagmatic bursts were recorded at 0811, 0817, and 0834 on 22 November.
The events generated plumes that rose 200-1,500 m based on thermal camera images.
PHIVOLCS stated that the events were likely driven by fracturing and gas release from magma beneath the Taal Volcano Island.
The Volcano Alert Level remained at a 2 (on a scale of 0-5).
PHIVOLCS reminded the public that the entire Taal Volcano Island is a Permanent Danger Zone (PDZ) and that boating on Taal Lake was prohibited.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Fonte/Source: Global Volcanism Program/Smithsonian Institution

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