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Satellite image of Semeru volcano on 3 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, and moving at 05 kts in N direction.
Original VAAC bulletin:

FVAU02 at 06:00 UTC, 03/09/26 from ADRM
VA ADVISORY
DTG: 20260903/0600Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/1007
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 LAST REPORTED AT 03/0006Z
EST VA DTG: 03/0540Z
EST VA CLD: SFC/FL150 S0808 E11258 - S0808 E11252 - S0737
 E11241 - S0737 E11310 MOV N 05KT
FCST VA CLD +6 HR: 03/1140Z SFC/FL150 S0808 E11258 - S0807
 E11250 - S0741 E11245 - S0734 E11307 - S0751 E11321
FCST VA CLD +12 HR: 03/1740Z SFC/FL150 S0810 E11255 - S0806
 E11249 - S0739 E11255 - S0741 E11317 - S0800 E11322
FCST VA CLD +18 HR: 03/2340Z SFC/FL150 S0807 E11251 - S0800
 E11252 - S0754 E11324 - S0821 E11320
RMK: VA NOT IDENTIFIABLE ON RECENT SATELLITE IMAGERY.
 HOWEVER, EMISSION IS EXPECTED TO BE ONGOING. VA HEIGHT AND
 MOVEMENT BASED ON GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260903/1200Z=

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 7000 ft (2100 m), or flight level 070.
Original VAAC bulletin:

FVAU05 at 00:20 UTC, 03/09/26 from ADRM
VA ADVISORY
DTG: 20260903/0020Z
VAAC: DARWIN
VOLCANO: LEWOTOLOK 264230
PSN: S0816 E12330
AREA: INDONESIA
SOURCE ELEV: 1423M AMSL
ADVISORY NR: 2026/186
INFO SOURCE: HIMAWARI-9
ERUPTION DETAILS: VA TO FL070 EXTD W, OBS AT 03/0000Z
OBS VA DTG: 03/0000Z
OBS VA CLD: SFC/FL070 S0817 E12334 - S0826 E12333 - S0827
 E12311 - S0817 E12304 - S0804 E12313 - S0810 E12332 MOV W
 05KT
FCST VA CLD +6 HR: 03/0600Z NO VA EXP
FCST VA CLD +12 HR: 03/1200Z NO VA EXP
FCST VA CLD +18 HR: 03/1800Z NO VA EXP
RMK: WEAK VA EMISSION IDENTIFIABLE ON SATELLITE IMAGERY
 MOVING W AND IS EXPECTED TO DISSIPATE WITHIN 6 HRS. VA
 HEIGHT AND FORECAST BASED ON SATELLITE IMAGERY AND MODEL
 GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260903/0620Z=

Ash was last reported up to FL140 at 02/0020Z, with the estimated ash cloud position as of 02/2230Z. The latest satellite imagery could not detect ash due to meteorological clouds; ongoing emissions are expected based on ground reports and model guidance.
Original VAAC bulletin:

FVAU06 at 22:48 UTC, 02/09/26 from ADRM
VA ADVISORY
DTG: 20260902/2250Z
VAAC: DARWIN
VOLCANO: SINABUNG 261080
PSN: N0310 E09824
AREA: INDONESIA
SOURCE ELEV: 2460M AMSL
ADVISORY NR: 2026/16
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA LAST TO FL140 LAST REPORTED AT 02/0020Z
EST VA DTG: 02/2230Z
EST VA CLD: SFC/FL140 N0307 E09832 - N0239 E09815 - N0251
 E09749 - N0315 E09743 - N0331 E09803 - N0322 E09826 MOV SW
 05KT
FCST VA CLD +6 HR: 03/0430Z SFC/FL140 N0309 E09836 - N0235
 E09816 - N0245 E09743 - N0315 E09738 - N0334 E09759 - N0323
 E09830
FCST VA CLD +12 HR: 03/1030Z SFC/FL140 N0307 E09839 - N0234
 E09816 - N0243 E09748 - N0313 E09734 - N0334 E09748 - N0335
 E09820
FCST VA CLD +18 HR: 03/1630Z SFC/FL140 N0307 E09833 - N0302
 E09817 - N0309 E09806 - N0340 E09756 - N0344 E09835
RMK: VA NOT DISCERNIBLE ON LATEST SAT IMAGERY DUE TO MET
 CLOUD. VA EMISSION IS EXPECTED TO BE ONGOING. HEIGHT AND
 MOVEMENT BASED ON GROUND REPORT, HIMAWARI-9 IMAGERY AND
 MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260903/0450Z=