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Semeru Volcanic Ash Advisory: ash plume to 15,000 ft (4,600 m) as of Aug 17, 04:53 UTC

Satellite image of Semeru volcano on 17 Aug 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 NW direction.

Original VAAC bulletin:

FVAU02 at 04:53 UTC, 17/08/26 from ADRM
VA ADVISORY
DTG: 20260817/0450Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/936
INFO SOURCE: HIMAWARI-9, CVGHM, WEBCAM
ERUPTION DETAILS: VA TO FL150 OBS FROM GROUND 16/2209Z
EST VA DTG: 17/0430Z
EST VA CLD: SFC/FL150 S0816 E11253 - S0806 E11223 - S0735
 E11236 - S0742 E11311 - S0812 E11308 MOV NW 05KT
FCST VA CLD +6 HR: 17/1030Z SFC/FL150 S0815 E11259 - S0804
 E11226 - S0738 E11235 - S0735 E11300 - S0753 E11317
FCST VA CLD +12 HR: 17/1630Z SFC/FL150 S0815 E11301 - S0806
 E11228 - S0739 E11236 - S0739 E11308 - S0800 E11324
FCST VA CLD +18 HR: 17/2230Z SFC/FL150 S0816 E11254 - S0801
 E11230 - S0735 E11243 - S0739 E11309 - S0757 E11321
RMK: VA NOT IDENTIFIABLE ON SATELLITE IMAGERY DUE TO MET
 CLOUD. RECENT GROUND REPORTS INDICATE INTERMITTENT ERUPTIONS
 ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON PAST SATELLITE
 IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260817/1050Z=
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Krakatau Volcanic Ash Advisory: ash plume to 6,000 ft (1,800 m) as of Aug 17, 01:40 UTC

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 6000 ft (1800 m), or flight level 060.

Original VAAC bulletin:

FVAU05 at 02:01 UTC, 17/08/26 from ADRM
VA ADVISORY
DTG: 20260817/0200Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/111
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL060 OBS AT 17/0140Z MOV NE
OBS VA DTG: 17/0140Z
OBS VA CLD: SFC/FL060 S0615 E10524 - S0609 E10513 - S0542
 E10509 - S0534 E10530 - S0542 E10553 - S0606 E10553 MOV NE
 05KT
FCST VA CLD +6 HR: 17/0740Z SFC/FL060 S0615 E10532 - S0613
 E10454 - S0545 E10459 - S0534 E10530 - S0542 E10553
FCST VA CLD +12 HR: 17/1340Z SFC/FL060 S0615 E10533 - S0617
 E10454 - S0553 E10456 - S0538 E10515 - S0539 E10540
FCST VA CLD +18 HR: 17/1940Z SFC/FL060 S0615 E10533 - S0621
 E10455 - S0557 E10454 - S0540 E10508 - S0538 E10533
RMK: CONTINUOUS VA IDENTIFIABLE ON SATELLITE. HEIGHT AND
 MOVEMENT BASED ON SATELLITE IMAGERY, GROUND REPORTS AND
 MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260817/0800Z=
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Dukono Volcanic Ash Advisory: ash plume to 8,000 ft (2,400 m) as of Aug 16, 22:25 UTC

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 8000 ft (2400 m), or flight level 080.

Original VAAC bulletin:

FVAU01 at 22:25 UTC, 16/08/26 from ADRM
VA ADVISORY
DTG: 20260816/2220Z
VAAC: DARWIN
VOLCANO: DUKONO 268010
PSN: N0142 E12754
AREA: INDONESIA
SOURCE ELEV: 1229M AMSL
ADVISORY NR: 2026/634
INFO SOURCE: HIMAWARI-9
ERUPTION DETAILS: VA TO FL080 OBS AT 16/2200Z MOV NE
EST VA DTG: 16/2200Z
EST VA CLD: SFC/FL080 N0129 E12749 - N0144 E12740 - N0213
 E12753 - N0201 E12834 - N0124 E12830 MOV NE 10KT
FCST VA CLD +6 HR: 17/0400Z SFC/FL080 N0132 E12749 - N0144
 E12740 - N0217 E12810 - N0156 E12838 - N0124 E12826
FCST VA CLD +12 HR: 17/1000Z SFC/FL080 N0131 E12748 - N0148
 E12738 - N0214 E12756 - N0205 E12838 - N0124 E12829
FCST VA CLD +18 HR: 17/1600Z SFC/FL080 N0130 E12749 - N0145
 E12739 - N0211 E12801 - N0204 E12837 - N0123 E12831
RMK: VA EMISSIONS IDENTIFIABLE ON SATELLITE IMAGERY BUT
 PARTIALLY OBSCURED BY MET CLOUD. EMISSIONS EXPECTED TO BE
 ONGOING. HEIGHT AND MOVEMENT BASED ON SATELLITE IMAGERY AND
 MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260817/0420Z=