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)

12/09 10:40 2026-217 DARWIN

12/09 05:00 2026-216 DARWIN

11/09 23:00 2026-215 DARWIN

11/09 17:00 2026-214 DARWIN

11/09 11:00 2026-213 DARWIN

11/09 05:00 2026-212 DARWIN

10/09 23:00 2026-211 DARWIN

10/09 17:00 2026-210 DARWIN

10/09 11:00 2026-209 DARWIN

10/09 05:00 2026-208 DARWIN

09/09 23:00 2026-207 DARWIN

09/09 17:00 2026-206 DARWIN

09/09 11:00 2026-205 DARWIN

09/09 05:30 2026-204 DARWIN

08/09 23:30 2026-203 DARWIN

08/09 17:30 2026-202 DARWIN

08/09 11:30 2026-201 DARWIN

08/09 05:30 2026-200 DARWIN

07/09 23:30 2026-199 DARWIN

07/09 17:30 2026-198 DARWIN

07/09 14:30 2026-197 DARWIN

07/09 11:30 2026-196 DARWIN

07/09 08:30 2026-195 DARWIN

07/09 05:30 2026-194 DARWIN

07/09 02:30 2026-193 DARWIN

06/09 23:30 2026-192 DARWIN

06/09 20:10 2026-191 DARWIN

06/09 17:30 2026-190 DARWIN

06/09 14:30 2026-189 DARWIN

06/09 11:30 2026-188 DARWIN

06/09 09:10 2026-187 DARWIN

06/09 06:30 2026-185 DARWIN

06/09 06:30 2026-186 DARWIN

06/09 03:30 2026-184 DARWIN

06/09 00:30 2026-183 DARWIN

05/09 22:30 2026-182 DARWIN

05/09 20:30 2026-181 DARWIN

05/09 18:30 2026-180 DARWIN

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 2026-09-12 at 10:40 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 11 0820 UTC move southwest.
Volcanic ash not identifiable on recent satellite imagery. No other reports indicate ongoing eruption. Advisory terminated.

Original Message :

Volcanic Ash Advisory issued on 2026-09-12 at 05:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 11 0820 UTC move southwest.
Volcanic ash not identifiable on latest satellite img due to meteorological cloud. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on last observation before a break in coverage at a manual station observed movement, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-11 at 23:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 11 0820 UTC move southwest.
Volcanic ash not identifiable on latest satellite img. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on recent satellite img, model guidance and ground reports. Corrected advisory for typo in observation.

Original Message :

Volcanic Ash Advisory issued on 2026-09-11 at 17:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 11 0820 UTC move southwest.
Volcanic ash not identifiable on latest satellite img. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on recent satellite img, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-11 at 11:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 11 0820 UTC move southwest.
Volcanic ash not identifiable on latest satellite img. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on recent satellite img, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-11 at 05:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 11 0440 UTC move southwest.
Continuous volcanic ash emission identifiable on current satellite img extending southwest. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on recent satellite img, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-10 at 23:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 10 1040 UTC move w.
Volcanic ash not identifiable on current satellite img due to darkness and meteorological cloud. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on recent satellite img, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-10 at 17:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) last observation before a break in coverage at a manual station observation at 10 1040 UTC move w.
Volcanic ash not identifiable on current satellite img due to darkness and meteorological cloud. Eruptions are expected to be ongoing. Volcanic ash height and forecast movement based on recent satellite img, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-10 at 11:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) observation at 10 1040 UTC move nw.
Volcanic ash identifiable on satellite imagery moving nw. Volcanic ash height and forecast movement based on satellite imagery, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-10 at 05:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) observation at 10 0440 UTC move nw.
Volcanic ash identifiable on satellite imagery moving nw. Volcanic ash height and forecast movement based on satellite imagery, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-09 at 23:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) observation at 09 1040 UTC move southwest.
Volcanic ash not identifiable on satellite imagery due to meteorological cloud and darkness, last observation before a break in coverage at a manual station observation moving southwest. Volcanic ash height and forecast movement based on earlier satellite imagery, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-09 at 17:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) observation at 09 1040 UTC move southwest.
Volcanic ash not identifiable on satellite imagery due to meteorological cloud and darkness, last observation before a break in coverage at a manual station observation moving southwest. Volcanic ash height and forecast movement based on earlier satellite imagery, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-09 at 11:00 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) observation at 09 1040 UTC move southwest.
Volcanic ash identifiable on satellite imagery drifing southwest. Smoke emissions observed on satellite moving north east of the summit may also volcanic ash. Volcanic ash height and forecast movement based on satellite imagery, model guidance and ground reports.

Original Message :

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

Key information extracted from original VAA message :

Volcanic ash to flight level 50 (1500m) observation at 09 0510 UTC.
Volcanic ash identifiable on satellite imagery. Volcanic ash height and forecast movement based on satellite imagery, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-08 at 23:30 UTC.

Key information extracted from original VAA message :

Volcanic ash rep from ground at 08 1747 UTC.
Volcanic ash not detected on current satellite imagery due to meteorological cloud. Ongoing low level volcanic ash emissions possible. Volcanic ash height and forecast movement based on satellite imagery, model guidance and ground reports.

Original Message :

Volcanic Ash Advisory issued on 2026-09-08 at 17:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 70 (2100m) last observation before a break in coverage at a manual station observation at 07 1110 UTC move south.
Volcanic ash not detected on current satellite imagery due to meteorological cloud and darkness, last observation before a break in coverage at a manual station observation move south. Ongoing low level volcanic ash emissions possible. Volcanic ash height and forecast movement based on satellite imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-08 at 11:30 UTC.

Key information extracted from original VAA message :

Volcanic ash emission to flight level 70 (2100m) observation at 07 1110 UTC move south.
Volcanic ash to flight level 70 (2100m) move south identifiable on current satellite img. Volcanic ash eruptive activity at the volcano has decreased. Volcanic ash height and forecast movement based on satellite imagery and model guidance.

Original Message :

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

Key information extracted from original VAA message :

Continuous emission to flight level 70 (2100m) observation at 07 0510 UTC move southwest.
Continuous volcanic ash to flight level 70 (2100m) move southwest identifiable on current satellite img. Volcanic ash to flight level 150 (4500m) from earlier eruption has dissipated. Volcanic ash height and forecast move based on satellite and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 23:30 UTC.

Key information extracted from original VAA message :

Continuous emission to flight level 70 (2100m) observation at 07 2310 UTC move southwest.
Continuous volcanic ash to flight level 70 (2100m) move ssw identifiable on current satellite img. Volcanic ash to flight level 150 (4500m) from earlier eruption has dissipated. Volcanic ash height and forecast move based on satellite and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 17:30 UTC.

Key information extracted from original VAA message :

Continuous emission to flight level 60 (1800m) at 07 1710 UTC.
Continuous volcanic ash to flight level 60 (1800m) move ssw. Volcanic ash to flight level 150 (4500m) from earlier eruption has dissipated. Volcanic ash height and forecast move based on satellite and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 14:30 UTC.

Key information extracted from original VAA message :

Volcanic ash observation to flight level 150 (4500m) continuous emission to flight level 60 (1800m).
Continuous volcanic ash to flight level 60 (1800m) move ssw. Remnants from earlier flight level 150 (4500m) eruption detected to the northwest, expected to dissipate in volcanic ash hght and fcast based on satellite and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 11:30 UTC.

Key information extracted from original VAA message :

Volcanic ash observation to flight level 150 (4500m) continuous emission to flight level 60 (1800m).
Volcanic ash to flight level 500 (15000m) no longer discernible. Continuous volcanic ash to flight level 60 (1800m) move southwest. Remnants from earlier flight level 150 (4500m) eruption detected to the northwest, expected to dissipate in 6-12hrs. Volcanic ash hght and fcast based on satellite and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 08:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move southwest.
High level volcanic ash to flight level 500 (15000m) detached from volcano and moving sw, expected to dissipate 6-12 continuous volcanic ash to flight level 150 (4500m) move southwest with remnants from earlier eruption detected to the north. Volcanic ash hght and fcast based on satellite img and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 05:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move southwest.
High level volcanic ash to flight level 500 (15000m) detached from volcano and moving sw, expected to dissipate 12-18 continuous volcanic ash to flight level 150 (4500m) move southwest with remnants from earlier eruption spreading radially from summit. Volcanic ash hght and fcast based on satellite img and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-07 at 02:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move w.
High level volcanic ash to flight level 500 (15000m) detached from volcano and moving sw, expected to dissipate 12-18 continuous volcanic ash to flight level 150 (4500m) move w with remnants from earlier eruption spreading radially from summit. Volcanic ash height and fcast based on satellite img and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 23:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move w.
High level volcanic ash to flight level 500 (15000m) is detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 150 (4500m) move w with remnants from earlier eruption spreading radially from summit. Volcanic ash height and forecast based on satellite imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 20:10 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move w.
High level volcanic ash to flight level 500 (15000m) is detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 150 (4500m) move w, with remnants of volcanic ash from earlier eruption still present. Volcanic ash height and forecast based on satellite imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 17:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move se.
High level volcanic ash to flight level 500 (15000m) is detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 150 (4500m) move se, with remnants of volcanic ash from earlier eruption still present. Volcanic ash height and forecast based on satellite imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 14:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move se.
High level volcanic ash to flight level 500 (15000m) is detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 150 (4500m) move se, with remnants of volcanic ash from earlier eruption still present. Volcanic ash height and forecast based on satellite imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 11:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 150 (4500m) move e.
High level volcanic ash to flight level 500 (15000m) is detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 150 (4500m) move e, with remnants of volcanic ash from earlier eruption still present. Volcanic ash height and forecast based on satellite imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 09:10 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 120 (3600m) move w.
High level volcanic ash to flight level 500 (15000m) is now detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 150 (4500m) move w, with remnants of volcanic ash from earlier eruption drifting e. Volcanic ash height and forecast based on satellite imagery and model guidance.

Original Message :

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

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 120 (3600m) move w.
High level volcanic ash to flight level 500 (15000m) is now detatched from the volcano and moving southwest. Continuous volcanic ash emission to flight level 120 (3600m) move w, with remnants of volcanic ash from earlier eruption drifting e. Volcanic ash height and forecast based on satellite imagery and model giuidance.

Original Message :

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

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 120 (3600m) move w.
High level volcanic ash to flight level 500 (15000m) is now detached from the volcano and moving southwest. Continuous volcanic ash emission to flight level 120 (3600m) move w, with remnants of volcanic ash from earlier eruption drifting e. Volcanic ash height and forecast based on satellite imagery and model guidance. *corrected graphics*.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 03:30 UTC.

Key information extracted from original VAA message :

Volcanic ash to flight level 500 (15000m) move sw, volcanic ash to flight level 200 (6000m) move w.
High level volcanic ash to flight level 500 (15000m) is now detatched from the volcano and moving southwest. Continuous volcanic ash emission to flight level 200 (6000m) move w, with remnants of volcanic ash from earlier eruption also drifting e. Volcanic ash height and forecast based on satellite imagery and dispersion model giuidance.

Original Message :

Volcanic Ash Advisory issued on 2026-09-06 at 00:30 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 e.
High level volcanic ash to flight level 500 (15000m) move w and continuous volcanic ash to flight level 200 (6000m) move e. Volcanic ash height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Volcanic Ash Advisory issued on 2026-09-05 at 22:30 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 e.
High level volcanic ash to flight level 500 (15000m) move w and continuous volcanic ash to flight level 200 (6000m) move e. Volcanic ash height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Volcanic Ash Advisory issued on 2026-09-05 at 20:30 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 to e.
Continuous volcanic ash to flight level 500 (15000m) move w and to flight level 200 (6000m) move to e, identifiable on satellite imagery. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

Volcanic Ash Advisory issued on 2026-09-05 at 18:30 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 to e.
Continuous volcanic ash to flight level 500 (15000m) identifiable on satellite image move w. Continuous volcanic ash to flight level 200 (6000m) move to e. Height and move based on satellite imagery and forecast based on dispersion.

Original Message :

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 :

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 :

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 :

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 :

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 :

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 :

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