Satellite image of Semeru volcano on 20 Oct 2026Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 15000 ft (4600 m), or flight level 150.Original VAAC bulletin:FVAU02 at 15:08 UTC, 20/10/26 from ADRMVA ADVISORYDTG: 20261020/1510ZVAAC: DARWINVOLCANO: SEMERU 263300PSN: S0806 E11255AREA: INDONESIASOURCE ELEV: 3657M AMSLADVISORY NR: 2026/1201INFO SOURCE: HIMAWARI-9, CVGHMERUPTION DETAILS: VA TO FL150 OBS AT 20/1450Z MOV WOBS VA DTG: 20/1450ZOBS VA CLD: SFC/FL150 S0803 E11300 - S0810 E11300 - S0818 E11216 - S0758 E11207 - S0744 E11230 MOV W 10KTFCST VA CLD +6 HR: 20/2050Z SFC/FL150 S0806 E11302 - S0813 E11258 - S0803 E11211 - S0741 E11213 - S0737 E11233FCST VA CLD +12 HR: 21/0250Z SFC/FL150 S0806 E11302 - S0814 E11258 - S0803 E11207 - S0741 E11209 - S0735 E11233FCST VA CLD +18 HR: 21/0850Z SFC/FL150 S0806 E11302 - S0813 E11257 - S0757 E11209 - S0739 E11210 - S0735 E11231RMK: VA EMISSIONS OBS ON CURRENT SATELLITE IMAGERY. GROUND REPORTS INDICATE ERUPTIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON SAT IMG, GROUND REPORTS AND MODEL GUIDANCE.NXT ADVISORY: NO LATER THAN 20261020/2110Z=