Krakatau Volcanic Ash Advisory: ash plume to 45,000 ft (13,700 m) as of Sep 4, 16:30 UTC

Satellite image of Krakatau volcano on 4 Sep 2026

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 45000 ft (13700 m), or flight level 450.
Original VAAC bulletin:

FVAU04 at 16:53 UTC, 04/09/26 from ADRM
VA ADVISORY
DTG: 20260904/1650Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/164
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: HIGH LEVEL ERUPTION TO FL450 MOV W
OBS VA DTG: 04/1630Z
OBS VA CLD: SFC/FL450 S0619 E10539 - S0625 E10447 - S0548
 E10446 - S0548 E10534 MOV W 05KT
FCST VA CLD +6 HR: 04/2230Z NOT AVBL
FCST VA CLD +12 HR: 05/0430Z NOT AVBL
FCST VA CLD +18 HR: 05/1030Z NOT AVBL
RMK: VA IDENTIFIABLE ON LATEST RGB SATELLITE IMAGERY. A MORE
 DETAILS ADVISORY TO FOLLOW AS SOON AS POSSIBLE.
NXT ADVISORY: WILL BE ISSUED BY 20260904/1710Z=