In a special report, PHIVOLCS noted that sulfur dioxide emissions were elevated at Taal, averaging 11,072 tonnes per day (t/d) on 6 June. Sulfur dioxide emissions have been continuously released since 2021 and averaged 8,294 t/d during 2024. Hazy or voggy conditions were reported at Alitagtag, Tingloy, San Nicolas, Laurel, Taysan, Lobo, and Batangas City, and were observed during field surveys in Agoncillo, Lemery, Taal, Santa Teresita, Alitagtag, Cuenca, Lipa, Balete, and Malvar.

Daily steam-and-gas emissions that were sometimes voluminous rose 1.9-2.4 km above the rim of Main Crater and drifted NNW, NW, SW, and SSE based on webcam images during 6-11 June. Two volcanic earthquakes were recorded during the week. During 7-8 June there were five periods of volcanic tremor lasting as short as three minutes and as long as 10 hours and eight minutes. A two-minute phreatic event was also recorded. Upwelling gases and hot fluids in the lake were observed during 8-10 June. Sulfur dioxide emissions averaged 2,470 t/d on 10 June. The Alert Level remained at 1 (on a scale of 0-5), and PHIVOLCS reminded the public that the entire Taal Volcano Island was a Permanent Danger Zone (PDZ) and to take extra precaution around Main Crater and along the Daang Kastila fissure.

Geological Summary. Taal is one of the most active volcanoes in the Philippines and has produced some powerful eruptions. 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, with several submerged eruptive centers. 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)