Satellite image of Semeru volcano on 26 Aug 2026Ground reports indicate ongoing eruptions at Semeru as of August 26, 2026, 15:40 UTC, with ash movement toward the east at 10 knots. Ash height was not directly observed; forecasts are based on previous satellite imagery, ground reports, and model guidance.Original VAAC bulletin:FVAU02 at 15:55 UTC, 26/08/26 from ADRMVA ADVISORYDTG: 20260826/1600ZVAAC: DARWINVOLCANO: SEMERU 263300PSN: S0806 E11255AREA: INDONESIASOURCE ELEV: 3657M AMSLADVISORY NR: 2026/975INFO SOURCE: HIMAWARI-9, CVGHMERUPTION DETAILS: VA ERUPTION REP FM GND AT 26/1240ZEST VA DTG: 26/1540ZEST VA CLD: SFC/FL150 S0808 E11252 - S0802 E11254 - S0758 E11324 - S0813 E11327 - S0826 E11318 MOV E 10KTFCST VA CLD +6 HR: 26/2140Z SFC/FL150 S0807 E11251 - S0802 E11254 - S0804 E11324 - S0822 E11324 - S0832 E11308FCST VA CLD +12 HR: 27/0340Z SFC/FL150 S0803 E11256 - S0810 E11321 - S0828 E11316 - S0832 E11257 - S0807 E11251FCST VA CLD +18 HR: 27/0940Z SFC/FL150 S0802 E11254 - S0809 E11321 - S0827 E11317 - S0832 E11256 - S0805 E11250RMK: VA NOT IDENTIFIABLE ON CURRENT SATELLITE IMAGERY, HOWEVER GROUND REPORTS INDICATE ONGOING ERUPTIONS. VA HEIGHT AND MOVEMENT BASED ON PAST SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE. NXT ADVISORY: NO LATER THAN 20260826/2200Z=