Overall Green Volcanic eruption for Merapi
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.



Volcanic Ash Advisory issued on 2023-07-19 at 05:20 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Continuous volcanic ash to flight level 120 (3600m) extend south.
  • Volcanic ash clearly identifiable on latest satellite imagery extending south from summit. Height and forecast based on himawari-9 19 0500 UTC imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2023-07-19 at 02:35 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Volcanic ash last observation before a break in coverage at a manual station observation to flight level 120 (3600m) at 19 0130 UTC.
  • Current satellite imagery indicates that ash from volcano merapi has now dissipated. No further reports of new or ongoing eruptions. Minor steam emissions near summit. Advisory terminated.

Original Message :

Volcanic Ash Advisory issued on 2023-07-19 at 00:57 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Discrete volcanic ash to flight level 120 (3600m) move south.
  • Multiple minor volcanic ash emissions identifiable on rgb satellite imagery extending south from summit and expected to dissipate 6 height and forecast based on himawari-9 imagery and model guidance.

Original Message :

Volcanic Ash Advisory issued on 2023-07-05 at 14:49 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Volcanic ash observation from ground move southwest at 05 1405 UTC.
  • Volcanic activity report received from bmkg indonesia reporting eruption to height at 05/1405z. Volcanic ash not identifiable om satellite img due to meteorological cloud cover. Advisory will be updated if new eruption information is received.

Original Message :