An eruption was reported at Semeru at 17/0402Z. As of 18 October 2026, 09:10 UTC, volcanic ash movement is estimated west at 10 knots, but no ash plume height was observed or reported.Original VAAC bulletin:FVAU02 at 09:09 UTC, 18/10/26 from ADRMVA ADVISORYDTG: 20261018/0910ZVAAC: DARWINVOLCANO: SEMERU 263300PSN: S0806 E11255AREA: INDONESIASOURCE ELEV: 3657M AMSLADVISORY NR: 2026/1192INFO SOURCE: HIMAWARI-9, CVGHMERUPTION DETAILS: ERUPTION REPORTED AT 17/0402ZEST VA DTG: 18/0850ZEST VA CLD: SFC/FL150 S0809 E11258 - S0819 E11208 - S0742 E11208 - S0803 E11258 MOV W 10KTFCST VA CLD +6 HR: 18/1450Z SFC/FL150 S0809 E11258 - S0821 E11208 - S0746 E11208 - S0803 E11258FCST VA CLD +12 HR: 18/2050Z SFC/FL150 S0809 E11258 - S0821 E11208 - S0746 E11208 - S0803 E11258FCST VA CLD +18 HR: 19/0250Z SFC/FL150 S0809 E11258 - S0819 E11216 - S0747 E11215 - S0803 E11258RMK: VA NOT IDENTIFIABLE ON SATELLITE IMAGERY DUE TO MET CLOUD. REGULAR GROUND REPORTS INDICATE INTERMITTENT ERUPTIONS ARE ONGOING. HEIGHT AND MOVEMENT BASED ON SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.NXT ADVISORY: NO LATER THAN 20261018/1510Z=