Roundup of Global Volcanic Activity – New Activity for the week 17 November – 23 November 2021
Asosan – Kyushu (Japan) : JMA lowered the Alert Level for Asosan to 2 (on a scale of 1-5) at 1100 on 18 November and decreased the restricted area to a radius of 1 km, noting that no eruptions had been recorded since the 21 October eruption. The sulfur dioxide emission rate remained elevated in November and was 2,100 tons per day on 16 November. The amplitudes of volcanic microtremors fluctuated for a period after the eruption, though they were generally small beginning on 1 November.
Karymsky – Eastern Kamchatka (Russia) : KVERT reported that during 11-13 and 18 November explosions at Karymsky generated ash plumes that rose as high as 8 km (26,200 ft) a.s.l. and drifted 400 km NE and NW. A thermal anomaly was visible in satellite images during 14-18 November.
Turrialba – Costa Rica : OVSICORI-UNA reported that at 0624 on 23 November a one-minute-long eruption at Turrialba produced a plume that rose 500 m above the crater rim and drifted SW. Another small eruption was recorded on 7 November.
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