Krakatau Volcanic Ash Advisory: ash plume to 6,000 ft (1,800 m) as of Aug 25, 18:20 UTC

Satellite image of Krakatau volcano on 25 Aug 2026

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 18:26 UTC, 25/08/26 from ADRM
VA ADVISORY
DTG: 20260825/1840Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/139
INFO SOURCE: HIMAWARI-9
ERUPTION DETAILS: VA TO FL060 MOV SW
OBS VA DTG: 25/1820Z
OBS VA CLD: SFC/FL060 S0609 E10532 - S0728 E10422 - S0608
E10341 - S0558 E10526 MOV SW 05KT
FCST VA CLD +6 HR: 26/0020Z SFC/FL060 S0606 E10535 - S0700
E10517 - S0742 E10426 - S0644 E10324 - S0532 E10349 - S0555
E10528
FCST VA CLD +12 HR: 26/0620Z SFC/FL060 S0610 E10535 - S0656
E10527 - S0732 E10412 - S0629 E10319 - S0510 E10359 - S0544
E10525
FCST VA CLD +18 HR: 26/1220Z SFC/FL060 S0610 E10534 - S0657
E10516 - S0716 E10353 - S0602 E10317 - S0504 E10418 - S0548
E10529
RMK: CONTINUOUS VA ERUPTION IDENTIFIABLE ON CURRENT
SATELLITE IMAGERY. HEIGHT AND MOVEMENT BASED ON HIMAWARI-9
SATELLITE IMAGERY AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260826/0040Z=

Ibu Volcanic Ash Advisory: ash plume to 7,000 ft (2,100 m) as of Aug 25, 13:20 UTC

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, and moving at 10 kts in N direction.
Original VAAC bulletin:

FVAU03 at 13:26 UTC, 25/08/26 from ADRM
VA ADVISORY
DTG: 20260825/1340Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2026/963
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL070 OBS AT 25/1320Z
OBS VA DTG: 25/1320Z
OBS VA CLD: SFC/FL070 N0126 E12740 - N0127 E12735 - N0146
E12730 - N0155 E12744 - N0142 E12752 MOV N 10KT
FCST VA CLD +6 HR: 25/1920Z SFC/FL070 N0127 E12741 - N0127
E12734 - N0146 E12728 - N0156 E12740 - N0148 E12751
FCST VA CLD +12 HR: 26/0120Z SFC/FL070 N0126 E12740 - N0127
E12734 - N0153 E12732 - N0200 E12748 - N0149 E12756
FCST VA CLD +18 HR: 26/0720Z SFC/FL070 N0126 E12740 - N0127
E12734 - N0154 E12732 - N0201 E12748 - N0149 E12757
RMK: VA ERUPTION OBS ON LATEST SATELLITE IMAGERY. VA HEIGHT
AND MOVEMENT BASED ON SATELLITE IMAGERY, GROUND REPORTS AND
MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260825/1940Z=