Report on Taal (Philippines) — 28 September-4 October 2022
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
28 September-4 October 2022
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2022. Report on Taal (Philippines). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 28 September-4 October 2022. Smithsonian Institution and US Geological Survey.
14.002°N, 120.993°E; summit elev. 311 m
All times are local (unless otherwise noted)
In a special advisory, PHIVOLCS reported that sulfur dioxide emissions at Taal were as high as 10,718 tonnes per day on 29 September, creating a significant amount of vog over the caldera. Voggy conditions were reported by residents of Laurel, Agoncillo, and Santa Teresita, Batangas. The report noted that sulfur dioxide emissions had been increasing since 15 July and averaged 6,612 tonnes per day in September. In early August degassing at the volcano increased characterized by the upwelling of hot fluids in the lake and steam-rich plumes rising as high as 2.5 km above the lake’s surface. The Alert Level remained at 1 (on a scale of 0-5), and PHIVOLCS warned the public that the entire Taal Volcano Island was a Permanent Danger Zone (PDZ).
Geological Summary. Taal is one of the most active volcanoes in the Philippines and has produced some of its most powerful historical eruptions. Though not topographically prominent, its prehistorical eruptions have greatly changed the landscape of SW Luzon. The 15 x 20 km Talisay (Taal) caldera is largely filled by Lake Taal, whose 267 km2 surface lies only 3 m above sea level. The maximum depth of the lake is 160 m, and several eruptive centers lie submerged beneath the lake. The 5-km-wide Volcano Island in north-central Lake Taal is the location of all observed eruptions. The island is composed of coalescing small stratovolcanoes, tuff rings, and scoria cones. Powerful pyroclastic flows and surges have caused many fatalities.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)