Semeru Volcanic Ash Advisory: ash plume to 15,000 ft (4,600 m) as of Sep 23, 09:51 UTC

Satellite image of Semeru volcano on 23 Sep 2026

Explosive 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 09:51 UTC, 23/09/26 from ADRM
VA ADVISORY
DTG: 20260923/0950Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/1089
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 OBS AT 23/0010Z
EST VA DTG: 23/0930Z
EST VA CLD: SFC/FL150 S0808 E11249 - S0759 E11250 - S0746
 E11314 - S0800 E11329 - S0816 E11323 - S0828 E11305 MOV SE
 10KT
FCST VA CLD +6 HR: 23/1530Z SFC/FL150 S0809 E11249 - S0800
 E11248 - S0743 E11313 - S0756 E11329 - S0821 E11320
FCST VA CLD +12 HR: 23/2130Z SFC/FL150 S0810 E11249 - S0801
 E11248 - S0744 E11313 - S0802 E11327 - S0823 E11316
FCST VA CLD +18 HR: 24/0330Z SFC/FL150 S0808 E11248 - S0757
 E11250 - S0753 E11325 - S0814 E11326 - S0826 E11308
RMK: VA NOT IDENTIFIABLE ON CURRENT SATELLITE IMAGERY. VA
 EMISSION IS EXPECTED TO BE ONGOING. HEIGHT AND MOVEMENT
 BASED ON SATELLITE IMAGERY, GROUND REPORTS AND MODEL
 GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260923/1550Z=