Vulcanian eruption from Semeru volcano on 18 Jan (image: PVMBG)
Vulcanian-type eruptions continue to take place from Jonggring Saloko crater at roughly regular intervals every 15-30 minutes. Grey ash plumes rose about 500 meters above the crater over the past days, throwing lava bombs in various directions.
The volcano observatory reported a seismic signal with a maximum amplitude of 20 mm and a duration of 100 seconds.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi volcano activity update 20 January 2023
Heat radiation of the viscous lava flow emanating from the lava dome as seen in a satellite image on 10 Jan (image: Sentinel 2)