The Volcanic Ash Advisory Center (VAAC) Darwin issued the following bulletin.
Original VAAC bulletin:
FVAU02 at 21:49 UTC, 21/09/26 from ADRM
VA ADVISORY
DTG: 20260921/2150Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/1083
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA LAST REPORTED AT 21/1930Z
EST VA DTG: 21/2130Z
EST VA CLD: SFC/FL150 S0809 E11251 - S0802 E11251 - S0751
E11321 - S0809 E11330 - S0824 E11318 MOV E 15KT
FCST VA CLD +6 HR: 22/0330Z SFC/FL150 S0809 E11251 - S0802
E11251 - S0751 E11321 - S0809 E11330 - S0824 E11318
FCST VA CLD +12 HR: 22/0930Z SFC/FL150 S0808 E11250 - S0801
E11252 - S0800 E11326 - S0816 E11328 - S0826 E11317
FCST VA CLD +18 HR: 22/1530Z SFC/FL150 S0808 E11250 - S0801
E11252 - S0800 E11326 - S0816 E11328 - S0826 E11317
RMK: VA NOT IDENTIFIABLE ON CURRENT SATELLITE IMAGERY DUE TO
MET CLOUD. HEIGHT AND MOVEMENT BASED ON SATELLITE IMAGERY,
GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260922/0350Z=