PHIVOLCS reported that hot volcanic fluids circulated and upwelled in Taal’s crater lake during 30 March through 6 April 2022, producing plumes that rose as high as 2 km above the lake’s surface and drifted SW. This report describes activity during April-October 2022 using reports from the Philippine Institute of Volcanology and Seismology (PHIVOLCS), the Tokyo Volcanic Ash Advisory Center (VAAC), and satellite data. A series of phreatic and phreatomagmatic explosions began in January 2020, and subsequent explosions occurred in July and November 2021, and January-March 2022 (NSEB 02:10, SEAN 03:02, BGVN 45:06, 46:10, 47:04). Since at least 1968, episodes of increased seismicity, elevated lake temperatures, steaming, significant sulfur dioxide plumes, and deformation have been reported, both during and independent of eruptive periods. Taal is a stratovolcano with a crater lake on a 5-km-wide volcanic island within a large caldera (Lake Taal) in the SW part of Luzon, Philippines, about 65 km S of Manila. Small phreatomagmatic explosions in April and October 2022 Most Recent Bulletin Report: November 2022 (BGVN 47:11) Cite this Report Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS) 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). One volcanic earthquake was recorded during 2-3 July. There were 9-11 daily volcanic earthquakes recorded during 29 June-2 July, including 1-8 periods of volcanic tremor, each lasting 1-14 minutes. Two periods of volcanic tremor, each lasting 2-3 minutes long, and three volcanic earthquakes were recorded during 26-29 June. Sulfur dioxide emissions were variable, averaging 7,480 (28 June), 1,165 (30 June), and 4,472 (3 July) tonnes per day. Upwelling gasses and hot fluids in the lake were periodically visible. Daily white steam-and-gas plumes, voluminous during the first half of the week, rose as high as 2.4 km above the lake and drifted NE, NW, S, and SW voggy conditions were reported during 2-3 July. PHIVOLCS reported continuing unrest at Taal during 26 June-4 July. Most Recent Weekly Report: 28 June-4 July 2023 Cite this Report
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