Satellite image of Krakatau volcano on 21 Aug 2026
A ground report at 20/2348Z indicated volcanic ash up to FL020 moving northwest. Ash was not visible on satellite imagery due to weather clouds; forecasts are based on ground observations and models.
Original VAAC bulletin:
FVAU05 at 00:27 UTC, 21/08/26 from ADRM
VA ADVISORY
DTG: 20260821/0026Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/117
INFO SOURCE: WEBCAM, GROUND REPORT
ERUPTION DETAILS: GROUND REPORT AT 20/2348Z OF VA TO FL020
MOV NW
EST VA DTG: 21/0000Z
EST VA CLD: SFC/FL020 S0609 E10529 - S0609 E10435 - S0531
E10452 - S0604 E10530 MOV NW 10KT
FCST VA CLD +6 HR: 21/0600Z SFC/FL020 S0604 E10528 - S0608
E10528 - S0628 E10434 - S0547 E10438
FCST VA CLD +12 HR: 21/1200Z SFC/FL020 S0603 E10528 - S0610
E10528 - S0615 E10430 - S0533 E10440
FCST VA CLD +18 HR: 21/1800Z SFC/FL020 S0610 E10528 - S0602
E10431 - S0525 E10456 - S0604 E10529
RMK: VA NOT IDENTIFIABLE ON SATELLITE IMAGERY DUE TO
OBSCURATION BY MET CLOUD, HOWEVER ERUPTION ASSUMED TO BE
CONTINUOUS BASED ON GROUND REPORT. HEIGHT AND FORECAST BASED
ON GROUND REPORT AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260821/0626Z=