An eruption was reported at Semeru at 14:51 UTC on October 17. Ash movement toward the west at 10 knots is estimated, but the ash cloud height was not observed; forecasts indicate continued activity.Original VAAC bulletin:FVAU02 at 15:49 UTC, 17/10/26 from ADRMVA ADVISORYDTG: 20261017/1550ZVAAC: DARWINVOLCANO: SEMERU 263300PSN: S0806 E11255AREA: INDONESIASOURCE ELEV: 3657M AMSLADVISORY NR: 2026/1189INFO SOURCE: HIMAWARI-9, CVGHMERUPTION DETAILS: ERUPTION REPORTED AT 17/1451ZEST VA DTG: 17/1530ZEST VA CLD: SFC/FL150 S0811 E11258 - S0828 E11209 - S0756 E11204 - S0801 E11258 MOV W 10KTFCST VA CLD +6 HR: 17/2130Z SFC/FL150 S0811 E11258 - S0828 E11209 - S0756 E11204 - S0801 E11258FCST VA CLD +12 HR: 18/0330Z SFC/FL150 S0811 E11258 - S0825 E11209 - S0740 E11209 - S0801 E11258FCST VA CLD +18 HR: 18/0930Z SFC/FL150 S0801 E11258 - S0811 E11258 - S0811 E11204 - S0744 E11207RMK: 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 20261017/2150Z=