Taal, Fukuyoku and Sheveluch activity.

Opinion of the Phivolcs of August 19, 2021 / 4:30 p.m. concerning the high emissions of sulfur dioxide by the Taal volcano:

The first measurement of volcanic sulfur dioxide emitted from the main Taal crater this morning, August 19, 2021, reached 15,347 tonnes per day. This shows an increasing trend in SO₂ emissions since August 13, 2021 with an average since then to this morning of 8,351 tonnes per day.

A steam-rich plume 1,000-3,000 meters high is generated by the main crater of Taal. Today there were temperatures of 32.2 ° C, relative humidity of 55.8% and slow wind gusts of only 0-2.3 m / s at speeds of up to 0-2.3 km / s.

High flux of SO₂, water vapor emitted in the plume, weak wind movements and solar radiation can continue to create volcanic smog / VOG in the Taal area. DOST-PHIVOLCS has received reports of adverse effects on some residents of Talisay, Brgy, Barigon, and Agoncillo in Batangas province; foggy conditions are observed over Taal Lake and surrounding towns. {...}

Local governments are also encouraged to monitor the activities of aquaculture workers on Lake Taal, to ensure that no one approaches Taal Volcano Island at the risk of being exposed to lethal concentrations of sulfur dioxide.

Source: DOST-PHIVOLCS

The Geospatial Information Authority of Japan analyzed satellite images observed by the NASA / US Geological Survey (USGS) Landsat-8 earth observation satellite at 10:00 a.m. (Japan time) on the 17th, and the shape of Niijima / Fukutoku Okanoba.

The West Island measures 2.5 km for an area of ​​0.3 km²; the eastern crescent measures 1.5 km for an area of ​​0.1 km².

We can see an erosion on the east side, with an advantage for the west side, compared to the first photos. .

Source: GSI

The extrusive eruption continues at Sheveluch.

The growth of the lava dome continues, a strong fumarole activity, and an incandescence of the lava dome and hot avalanches accompany this process. KVERT satellite data showed a thermal anomaly over the volcano all week; gas-steam plumes containing a certain amount of ash spread 370 km southwest, east and southeast of the volcano throughout the week.

The aviation color code is ORANGE. Ash explosions up to 10-15 km altitude. could arise at any time. Current activity could affect international and low-flying aircraft.

Source: KVERT