Mount Semeru Volcano (112.92°E, 8.108°S) in Indonesia had geothermal anormaly since December 2 and erupted on December 4, 2021. Analysis of optical and infrared properties showed it had about 7~10km cloud top height and 80km/h speed.

Image by FY-4A with 500m resolution captured the volcano eruption at 08:00 (UTC) on December 4, 2021.

Cloud Top Height at 08:00 (UTC) on December 4, 2021.

Cloud Top Height at 08:30 (UTC) on December 4, 2021.

Cloud Top Height at 04:22 (UTC) on December 7, 2021.

Image by FY-3D in Micronesia on December 7, 2021.