Mount Semeru erupted on Sunday, December 19, 2021,

Mount Semeru erupted on Sunday, December 19, 2021, at 05:31 WIB with the height of the ash column observed ± 2000 m above the peak (± 5676 m above sea level). The ash column is observed to be white to gray with thick intensity towards the southwest. This eruption was recorded on a seismograph with a maximum amplitude of 20 mm and a duration of 720 seconds.