Satellite image of Semeru volcano on 18 Aug 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 04:50 UTC, 18/08/26 from ADRMVA ADVISORYDTG: 20260818/0450ZVAAC: DARWINVOLCANO: SEMERU 263300PSN: S0806 E11255AREA: INDONESIASOURCE ELEV: 3657M AMSLADVISORY NR: 2026/940INFO SOURCE: HIMAWARI-9, CVGHM, WEBCAMERUPTION DETAILS: VA TO FL150 OBS AT 18/0430Z MOV SEOBS VA DTG: 18/0430ZOBS VA CLD: SFC/FL150 S0804 E11251 - S0753 E11314 - S0808 E11320 - S0823 E11311 - S0811 E11251 MOV E 10KTFCST VA CLD +6 HR: 18/1030Z SFC/FL150 S0810 E11252 - S0804 E11250 - S0750 E11311 - S0758 E11318 - S0810 E11318FCST VA CLD +12 HR: 18/1630Z SFC/FL150 S0806 E11250 - S0747 E11305 - S0750 E11316 - S0801 E11318 - S0811 E11254FCST VA CLD +18 HR: 18/2230Z SFC/FL150 S0809 E11251 - S0744 E11257 - S0746 E11310 - S0755 E11317 - S0810 E11256RMK: VA IDENTIFIABLE ON RECENT SATELLITE IMAGERY MOV SE. INTERMITTENT VA EMISSIONS ARE ONGOING. VA HEIGHT AND MOV BASED ON SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.NXT ADVISORY: NO LATER THAN 20260818/1050Z=