Overall Orange Volcanic eruption for Krakatau in Indonesia on 04 Sep 2026 21:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Orange Volcanic eruption for Krakatau

in Indonesia

Volcano Ash Advisories for air traffic

Although Volcano Ash Advisories (VAAC) are not intended for assessing humanitarian impact, the observations of the plume are relevant for understanding local impact. The actual impact (like ash fall) depends on the type of eruption and is not known.

Click on the messages list to visualize on the right the detailed text.

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

04 Sep 22:10 04 Sep 22:31 05 Sep 00:30 05 Sep 02:30 05 Sep 04:30 05 Sep 06:30 05 Sep 08:30 05 Sep 10:30 05 Sep 12:30 05 Sep 14:30 05 Sep 16:30

05/09 16:30 2026-179 DARWIN

05/09 14:30 2026-178 DARWIN

05/09 12:30 2026-177 DARWIN

05/09 10:30 2026-176 DARWIN

05/09 08:30 2026-175 DARWIN

05/09 06:30 2026-174 DARWIN

Volcanic Ash Advisory issued on 2026-09-05 at 16:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move w, volcanic ash to flight level 200 (6000m) move south to se.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move south to se. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Received FVAU04 at 16:25 UTC, 05/09/26 from ADRM
VA ADVISORY
DTG: 20260905/1630Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/179
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: VA TO FL500 MOV W, VA TO FL200 MOV S TO SE
OBS VA DTG: 05/1610Z
OBS VA CLD: SFC/FL200 S0519 E10710 - S0639 E10930 - S0902 E10829 - S0933 E10514 - S0738 E10138 MOV SE 10KT SFC/FL500 S0711 E10611 - S1007 E09930 - S1547 E09446 - S1128 E08348 - S0311 E09128 - S0142 E10116 - S0517 E10715 MOV W 30KT
S0311 E09128 - S0142 E10116 - S0517 E10715 MOV W 30KT
FCST VA CLD +6 HR: 05/2210Z SFC/FL200 S0504 E10702 - S0655 E11008 - S0907 E10859 - S0959 E10507 - S0726 E10141 SFC/FL500 S0659 E10614 - S1029 E09932 - S1727 E09513 - S1210 E08104 - S0252 E09040 - S0003 E09932 - S0504 E10704
E08104 - S0252 E09040 - S0003 E09932 - S0504 E10704
FCST VA CLD +12 HR: 06/0410Z SFC/FL200 S0501 E10710 - S0653 E11017 - S0903 E10913 - S1001 E10515 - S0727 E10147 SFC/FL500 S0654 E10626 - S1016 E09957 - S1856 E09505 - S1244 E07912 - S0305 E08923 - N0010 E09945 - S0506 E10708
E07912 - S0305 E08923 - N0010 E09945 - S0506 E10708
FCST VA CLD +18 HR: 06/1010Z SFC/FL200 S0504 E10700 - S0641 E11009 - S0904 E10916 - S0959 E10501 - S0722 E10152 SFC/FL500 S0652 E10628 - S1026 E10000 - S1955 E09456 - S1314 E07817 - S0309 E08858 - N0028 E09940 - S0500 E10658
E07817 - S0309 E08858 - N0028 E09940 - S0500 E10658
RMK: CONTINUOUS VA TO FL500 IDENTIFIABLE ON SAT IMAGE MOV W.
CONTINUOUS VA TO FL200 MOV S TO SE. HEIGHT AND MOV BASED ON
SATELLITE IMAGERY AND FCST BASED ON DISPERSION MODELS.
NXT ADVISORY: NO LATER THAN 20260905/1830Z=

Volcanic Ash Advisory issued on 2026-09-05 at 14:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move w, volcanic ash to flight level 200 (6000m) move south to se.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move south to se. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Received FVAU04 at 14:26 UTC, 05/09/26 from ADRM
VA ADVISORY
DTG: 20260905/1430Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/178
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: VA TO FL500 MOV W, VA TO FL200 MOV S TO SE
OBS VA DTG: 05/1410Z
OBS VA CLD: SFC/FL200 S0500 E10626 - S0634 E10701 - S0727 E10853 - S0851 E10809 - S0954 E10536 - S0743 E10144 MOV SE 10KT SFC/FL500 S0648 E10555 - S0949 E09931 - S1657 E09438 - S1005 E08550 - S0313 E09407 - S0136 E10057 - S0500 E10628 MOV W 30KT
MOV W 30KT
FCST VA CLD +6 HR: 05/2010Z SFC/FL200 S0459 E10712 - S0644 E11009 - S0859 E10855 - S0948 E10512 - S0738 E10138 SFC/FL500 S0650 E10611 - S0958 E09920 - S1844 E09427 - S1129 E08303 - S0311 E09128 - N0005 E09913 - S0500 E10724
E08303 - S0311 E09128 - N0005 E09913 - S0500 E10724
FCST VA CLD +12 HR: 06/0210Z SFC/FL200 S0457 E10712 - S0655 E11008 - S0907 E10859 - S0959 E10507 - S0726 E10141 SFC/FL500 S0659 E10614 - S0959 E09925 - S1939 E09429 - S1204 E08010 - S0252 E09040 - N0039 E09904 - S0458 E10719
E08010 - S0252 E09040 - N0039 E09904 - S0458 E10719
FCST VA CLD +18 HR: 06/0810Z SFC/FL200 S0501 E10710 - S0653 E11017 - S0903 E10913 - S1001 E10515 - S0727 E10147 SFC/FL500 S0654 E10626 - S0959 E09919 - S1949 E09437 - S1317 E07801 - S0248 E08935 - N0041 E09902 - S0505 E10722
E07801 - S0248 E08935 - N0041 E09902 - S0505 E10722
RMK: CONTINUOUS VA TO FL500 IDENTIFIABLE ON SAT IMAGE MOV W.
CONTINUOUS VA TO FL200 MOV S TO SE. HEIGHT AND MOV BASED ON
SATELLITE IMAGERY AND FCST BASED ON DISPERSION MODELS.
NXT ADVISORY: NO LATER THAN 20260905/1630Z=

Volcanic Ash Advisory issued on 2026-09-05 at 12:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move w, volcanic ash to flight level 200 (6000m) move south to se.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move south to se. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Received FVAU04 at 12:27 UTC, 05/09/26 from ADRM
VA ADVISORY
DTG: 20260905/1230Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/177
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: VA TO FL500 MOV W, VA TO FL200 MOV S TO SE
OBS VA DTG: 05/1210Z
OBS VA CLD: SFC/FL200 S0618 E10635 - S0707 E10847 - S0856 E10801 - S0934 E10510 - S0724 E10217 - S0506 E10634 MOV SE 10KT SFC/FL500 S0649 E10600 - S0914 E09907 - S1519 E09606 - S0900 E08731 - S0257 E09628 - S0159 E10141 - S0506 E10634 MOV W 30KT
MOV W 30KT
FCST VA CLD +6 HR: 05/1810Z SFC/FL200 S0455 E10701 - S0637 E10931 - S0854 E10841 - S0955 E10514 - S0743 E10144 SFC/FL500 S0621 E10548 - S0923 E09913 - S1645 E09646 - S0924 E08601 - S0313 E09407 - S0110 E09954 - S0503 E10717
E08601 - S0313 E09407 - S0110 E09954 - S0503 E10717
FCST VA CLD +12 HR: 06/0010Z SFC/FL200 S0444 E10707 - S0644 E11009 - S0859 E10855 - S0948 E10512 - S0738 E10138 SFC/FL500 S0650 E10611 - S0958 E09920 - S1809 E09726 - S1011 E08420 - S0311 E09128 - N0005 E09913 - S0500 E10724
E08420 - S0311 E09128 - N0005 E09913 - S0500 E10724
FCST VA CLD +18 HR: 06/0610Z SFC/FL200 S0457 E10712 - S0655 E11008 - S0907 E10859 - S0959 E10507 - S0726 E10141 SFC/FL500 S0659 E10614 - S0959 E09934 - S1916 E09843 - S1053 E08141 - S0252 E09040 - N0039 E09904 - S0458 E10719
E08141 - S0252 E09040 - N0039 E09904 - S0458 E10719
RMK: CONTINUOUS VA TO FL500 IDENTIFIABLE ON SAT IMAGE MOV W.
CONTINUOUS VA TO FL200 MOV S TO SE. HEIGHT AND MOV BASED ON
SATELLITE IMAGERY AND FCST BASED ON DISPERSION MODELS.
NXT ADVISORY: NO LATER THAN 20260905/1430Z=

Volcanic Ash Advisory issued on 2026-09-05 at 10:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move w, volcanic ash to flight level 200 (6000m) move south to se.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move south to se. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Received FVAU04 at 10:23 UTC, 05/09/26 from ADRM
VA ADVISORY
DTG: 20260905/1030Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/176
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: VA TO FL500 MOV W, VA TO FL200 MOV S TO SE
OBS VA DTG: 05/1010Z
OBS VA CLD: SFC/FL200 S0524 E10553 - S0621 E10629 - S0724 E10825 - S0857 E10809 - S0916 E10505 - S0733 E10224 MOV SE 10KT SFC/FL500 S0625 E10549 - S0909 E09810 - S1213 E09621 - S0723 E09143 - S0353 E09722 - S0320 E10330 - S0520 E10553 MOV W 30KT
MOV W 30KT
FCST VA CLD +6 HR: 05/1610Z SFC/FL200 S0509 E10634 - S0653 E10907 - S0858 E10807 - S0918 E10505 - S0724 E10217 SFC/FL500 S0624 E10548 - S0850 E09920 - S1441 E09652 - S0736 E08853 - S0259 E09707 - S0205 E10101 - S0507 E10637
E08853 - S0259 E09707 - S0205 E10101 - S0507 E10637
FCST VA CLD +12 HR: 05/2210Z SFC/FL200 S0455 E10701 - S0637 E10931 - S0854 E10841 - S0955 E10514 - S0743 E10144 SFC/FL500 S0621 E10548 - S0923 E09913 - S1639 E09740 - S0822 E08703 - S0337 E09331 - S0110 E09954 - S0503 E10717
E08703 - S0337 E09331 - S0110 E09954 - S0503 E10717
FCST VA CLD +18 HR: 06/0410Z SFC/FL200 S0444 E10707 - S0648 E11001 - S0859 E10855 - S0948 E10512 - S0738 E10138 SFC/FL500 S0650 E10611 - S0946 E09917 - S1833 E09744 - S0914 E08415 - S0331 E09116 - N0002 E09905 - S0500 E10724
E08415 - S0331 E09116 - N0002 E09905 - S0500 E10724
RMK: CONTINUOUS VA TO FL500 IDENTIFIABLE ON SAT IMAGE MOV W.
CONTINUOUS VA TO FL200 MOV S TO SE. HEIGHT AND MOV BASED ON
SATELLITE IMAGERY AND FCST BASED ON DISPERSION MODELS.
NXT ADVISORY: NO LATER THAN 20260905/1230Z=

Volcanic Ash Advisory issued on 2026-09-05 at 08:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move w, volcanic ash to flight level 200 (6000m) move south to se.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move south to se. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Received FVAU04 at 08:28 UTC, 05/09/26 from ADRM
VA ADVISORY
DTG: 20260905/0830Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/175
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: VA TO FL500 MOV W, VA TO FL200 MOV S TO SE
OBS VA DTG: 05/0810Z
OBS VA CLD: SFC/FL200 S0544 E10522 - S0737 E10827 - S0825 E10805 - S0805 E10354 - S0630 E10355 MOV SE 10KT SFC/FL500 S0622 E10549 - S0900 E09823 - S0523 E09651 - S0413 E10106 - S0531 E10547 MOV W 30KT
S0531 E10547 MOV W 30KT
FCST VA CLD +6 HR: 05/1410Z SFC/FL200 S0545 E10521 - S0702 E10855 - S0847 E10810 - S0903 E10516 - S0730 E10247 SFC/FL500 S0625 E10549 - S0929 E09712 - S0635 E09502 - S0355 E09751 - S0355 E10147 - S0532 E10548
E09751 - S0355 E10147 - S0532 E10548
FCST VA CLD +12 HR: 05/2010Z SFC/FL200 S0545 E10521 - S0652 E10852 - S0858 E10807 - S0918 E10505 - S0724 E10217 SFC/FL500 S0624 E10548 - S1025 E09431 - S0554 E09231 - S0325 E09743 - S0345 E10217 - S0513 E10547
E09743 - S0345 E10217 - S0513 E10547
FCST VA CLD +18 HR: 06/0210Z SFC/FL500 S0621 E10548 - S1115 E09350 - S0926 E08957 - S0618 E08957 - S0324 E09742 - S0343 E10218 - S0511 E10547 SFC/FL200 S0538 E10530 - S0632 E10842 - S0855 E10826 - S0955 E10514 - S0743 E10144
- S0855 E10826 - S0955 E10514 - S0743 E10144
RMK: CONTINUOUS VA TO FL500 IDENTIFIABLE ON SAT IMAGE MOV W.
CONTINUOUS VA TO FL200 MOV S TO SE. HEIGHT AND MOV BASED ON
SATELLITE IMAGERY AND FCST BASED ON DISPERSION MODELS.
NXT ADVISORY: NO LATER THAN 20260905/1030Z=

Volcanic Ash Advisory issued on 2026-09-05 at 06:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move w, volcanic ash to flight level 200 (6000m) move south to se.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move south to se. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Received FVAU04 at 06:32 UTC, 05/09/26 from ADRM
VA ADVISORY
DTG: 20260905/0630Z
VAAC: DARWIN
VOLCANO: KRAKATAU 262000
PSN: S0606 E10525
AREA: INDONESIA
SOURCE ELEV: 155M AMSL
ADVISORY NR: 2026/174
INFO SOURCE: HIMAWARI-9 CVGHM
ERUPTION DETAILS: VA TO FL500 MOV W, VA TO FL200 MOV S TO SE
OBS VA DTG: 05/0610Z
OBS VA CLD: SFC/FL200 S0544 E10522 - S0733 E10817 - S0820 E10753 - S0743 E10404 - S0626 E10403 MOV SE 10KT SFC/FL500 S0622 E10549 - S0841 E09858 - S0623 E09736 - S0418 E10123 - S0531 E10547 MOV W 30KT
S0531 E10547 MOV W 30KT
FCST VA CLD +6 HR: 05/1210Z SFC/FL200 S0546 E10520 - S0704 E10844 - S0836 E10759 - S0855 E10521 - S0720 E10310 SFC/FL500 S0625 E10549 - S0920 E09725 - S0636 E09530 - S0356 E09751 - S0355 E10147 - S0532 E10548
E09751 - S0355 E10147 - S0532 E10548
FCST VA CLD +12 HR: 05/1810Z SFC/FL200 S0545 E10521 - S0650 E10848 - S0852 E10804 - S0908 E10508 - S0721 E10224 SFC/FL500 S0624 E10548 - S1017 E09450 - S0547 E09252 - S0325 E09743 - S0345 E10217 - S0513 E10547
E09743 - S0345 E10217 - S0513 E10547
FCST VA CLD +18 HR: 06/0010Z SFC/FL500 S0621 E10548 - S1056 E09433 - S0925 E09028 - S0602 E09030 - S0324 E09742 - S0343 E10218 - S0511 E10547 SFC/FL200 S0539 E10528 - S0634 E10842 - S0845 E10826 - S0943 E10518 - S0736 E10157
- S0845 E10826 - S0943 E10518 - S0736 E10157
RMK: CONTINUOUS VA TO FL500 IDENTIFIABLE ON SAT IMAGE MOV W.
CONTINUOUS VA TO FL200 MOV S TO SE. HEIGHT AND MOV BASED ON
SATELLITE IMAGERY AND FCST BASED ON DISPERSION MODELS.
NXT ADVISORY: NO LATER THAN 20260905/0830Z=

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