Report on Taal (Philippines) — 11 March-17 March 2020
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 11 March-17 March 2020
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2020. Report on Taal (Philippines). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 11 March-17 March 2020. Smithsonian Institution and US Geological Survey.
14.002°N, 120.993°E; summit elev. 311 m
All times are local (unless otherwise noted)
PHIVOLCS reported that during 11-17 March weak steam plumes at Taal rose 50-100 m above Volcano Island lake and drifted SW and NE. According to the Disaster Response Operations Monitoring and Information Center (DROMIC) there were a total of 4,131 people in 11 evacuation centers, and an additional 17,563 displaced people were staying at other locations as of 11 March. The Alert Level remained at 2 (on a scale of 0-5) and PHIVOLCS recommended no entry onto Volcano Island, the area defined as the Permanent Danger Zone.
Geologic Background. 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 historical eruptions. The island is composed of coalescing small stratovolcanoes, tuff rings, and scoria cones that have grown about 25% in area during historical time. Powerful pyroclastic flows and surges from historical eruptions have caused many fatalities.