Overall Green Volcanic eruption for Sangay
in Ecuador

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 2023-05-23 at 10:10 UTC.

    Key information extracted from original VAA message :


  • Prev volcanic ash has disp.
  • Volcanic ash is not observation on satellite for the past 10 no hot spot is observation either due to weather. Zhu.

Original Message :

Volcanic Ash Advisory issued on 2023-05-23 at 04:52 UTC.

    Key information extracted from original VAA message :


  • Poss volcanic ash emission.
  • Volcanic ash has not been observation on satellite for the past several hours due to dense weather clds, but is likely present. Volcanic ash is based on prev vaa and nwp model wind. Zhu.

Original Message :

Volcanic Ash Advisory issued on 2023-05-22 at 23:32 UTC.

    Key information extracted from original VAA message :


  • Ongoing volcanic ash emission.
  • Intermittent volcanic ash emission can be seen in infrared satellite imagery in cloud webcam mostly obscured by weather volcanic ash move to southwest and wsw of summit, expected to turn more w. Lee.

Original Message :

Volcanic Ash Advisory issued on 2023-05-22 at 19:12 UTC.

    Key information extracted from original VAA message :


  • Ongoing volcanic ash emission.
  • Volcanic ash emission noted in satellite imagery. Webcam inop. Volcanic ash move to southwest and wsw of the summit. Lee.

Original Message :

Volcanic Ash Advisory issued on 2023-05-22 at 13:25 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission continue.
  • Moderately dense volcanic ash plume detected on satellite moving southwest of summit. Strong hotspot noted on swir. Webcam shows volcanic ash emission. Model winds at forecast to veer by t+6 hour becoming more from the e. Konon.

Original Message :

Volcanic Ash Advisory issued on 2023-05-22 at 07:28 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Volcanic ash emission observation from satellite and webcam. Volcanic ash clouds moving southwest about 30 nm from summit. Model winds exp to shift to w by t+12 hours. Brown.

Original Message :

Volcanic Ash Advisory issued on 2023-05-22 at 01:40 UTC.

    Key information extracted from original VAA message :


  • Continuous em.
  • Volcanic ash ext 22 nm southwest of the summit. A remnant volcanic ash cloud was over the pacific 175 nm to the southwest of the summit. Little change exp based on nwp. Turk.

Original Message :

Volcanic Ash Advisory issued on 2023-05-21 at 20:06 UTC.

    Key information extracted from original VAA message :


  • Continuous em.
  • Volcanic ash ext 60 nm to the wsw of the summit. Volcanic ash forecast by nwp models to turn toward the southwest by t+6. Turk.

Original Message :

Volcanic Ash Advisory issued on 2023-05-21 at 14:10 UTC.

    Key information extracted from original VAA message :


  • Ongoing signature emission.
  • Large volcanic ash plume detected on satellite moving aprox 65 nm southwest of summit b4 dsiptng. Webcam shows continuous volcanic ash emission. Model winds at forecast to veer by t+12 hour becoming more from the e. Konon.

Original Message :

Volcanic Ash Advisory issued on 2023-05-21 at 08:13 UTC.

    Key information extracted from original VAA message :


  • Continuous emission observation.
  • Continuous volcanic ash emission observation from satellite moving southwest about 50 nm from summit. Webcam is down. Hotspot is detected. Model winds exp to shift slghtly e through t+12 hours. Brown.

Original Message :

Volcanic Ash Advisory issued on 2023-05-21 at 02:26 UTC.

    Key information extracted from original VAA message :


  • Continuous volcanic ash emission.
  • Volcanic ash cloud obsd extending 40 north mi wsw of the summit. Estd from nwp webcam showed activity around 00 UTC. Vona around same time reports volcanic ash moving southwest. Nwp models suggest volcanic ash to flight level 220 (6600m) with veering forecast through t+12hrs. Hosley.

Original Message :

Volcanic Ash Advisory issued on 2023-05-20 at 21:34 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash cloud obsd.
  • Volcanic ash cloud obsd 10 north mi w-wnw from summit. Webcams inop. Nwp models suggest volcanic ash up to flight level 210 (6300m) and forecast volcanic ash to move wsw by. Hosley.

Original Message :

Volcanic Ash Advisory issued on 2023-05-19 at 01:27 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash not detected.
  • Volcanic ash no longer detected from satellite imagery. Turk.

Original Message :

Volcanic Ash Advisory issued on 2023-05-18 at 19:38 UTC.

    Key information extracted from original VAA message :


  • Occasional em.
  • Volcanic ash was possible near the summit and a residual area of volcanic ash was detected 47 nm southwest of the summit. Volcanic ash forecast to move toward nw by t+6 based on nwp. Turk.

Original Message :

Volcanic Ash Advisory issued on 2023-05-18 at 13:40 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash seen in satellite and volcat alert.
  • Volcanic ash seen in satellite move wsw to flight level 190 (5700m) and extending around 20 nm from summit. Higher level volcanic ash move north to flight level 230 (6900m) and around 10 nm from summit. Nwp guidance shows a continue wsw move through t+12 hours to flight level 190 (5700m) and north to flight level 230 (6900m) through t+6 hours. Move and height based on sat, volcat and nwp. Kibler.

Original Message :

Volcanic Ash Advisory issued on 2023-05-10 at 06:57 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash event ended.
  • Remnant volcanic ash has dispd. No new volcanic ash emission observation. No reports of eruptive activity. Volcanic ash event ended. Ramirez.

Original Message :

Volcanic Ash Advisory issued on 2023-05-10 at 01:08 UTC.

    Key information extracted from original VAA message :


  • Poss volcanic ash emission.
  • Hotspot activity observation in satellite img but volcanic ash emission not visible poss due to meteorological occasional volcanic ash emission may continue move south from summit. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-05-09 at 19:14 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Vona received and volcanic ash emission poss observation in satellite img move southwest ext about 20 nmi from summit. Mvmt exp to shift south by t+6. And mvmt based on vona, satellite and nwp. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-05-06 at 14:11 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission ended.
  • Prev volcanic ash emission has ended. Nothing new seen in webcam or satellite. No hotspot detected. No rcnt repeats received. Brown.

Original Message :

Volcanic Ash Advisory issued on 2023-05-06 at 08:18 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash remant obsd.
  • Light volcanic ash remnant obsd in satellite moving wsw from summit. Hot spot obsd in satellite as well. Nwp model forecast through t+0hr. Zeng.

Original Message :

Volcanic Ash Advisory issued on 2023-05-06 at 02:28 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission obsd.
  • Volcanic ash emission obsd in satellite and volcanic ash clouds extend appx 40nmi wsw from summit. Nwp model forecast slightly backing through. Zeng.

Original Message :

Volcanic Ash Advisory issued on 2023-04-29 at 18:47 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission ended.
  • No recent reports of activity. Volcanic ash not detected on various satellite products. Webcam shows weather clouds.

Original Message :

Volcanic Ash Advisory issued on 2023-04-29 at 12:54 UTC.

    Key information extracted from original VAA message :


  • Discrete volcanic ash emission.
  • Volcanic ash emission observation in satellite img move w ext about 30 nmi from summit before dissipating. W mvmt exp through t+6. And mvmt based on satellite and nwp. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-28 at 01:16 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission ended.
  • Volcanic ash from earlier emission dispersed. No new activity noted in webcam or satellite imagery over the past 6+ hours. No new reports. Lee.

Original Message :

Volcanic Ash Advisory issued on 2023-04-27 at 19:25 UTC.

    Key information extracted from original VAA message :


  • Possible ongoing volcanic ash emission.
  • Dense cloud cover in the of the summit has obscured any possible volcanic ash. However, activity likely based on past recent hist. Volcanic ash move to wnw or nw according to nwp. Lee.

Original Message :

Volcanic Ash Advisory issued on 2023-04-27 at 13:45 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Vona received and volcanic ash emission observation in satellite img move wnw ext abou 15 nmi from summit. Wnw mvmt exp through t+6. And mvmt based on vona, satellite and nwp. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-26 at 22:50 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission ended.
  • No recent reports of activity. Volcanic ash not detected on various satellite products. Thick weather clouds cover summit area. New volcanic ash emission possible at any. Konon.

Original Message :

Volcanic Ash Advisory issued on 2023-04-26 at 17:04 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash seen in satellite.
  • Volcanic ash seen in satellite move sse from summit. Meteorological clouds have obscure part of the view of volcanic ash in satellite. Nwp guidance shows a continue sse move through t+6 hours. Move and height based on satellite and nwp. Kibler.

Original Message :

Volcanic Ash Advisory issued on 2023-04-26 at 11:13 UTC.

    Key information extracted from original VAA message :


  • Poss volcanic ash continuing.
  • Poss volcanic ash emission continuing but unable to be seen due to meteorological winds are light and var in of volcano. Move and height based on nwp. Kibler.

Original Message :

Volcanic Ash Advisory issued on 2023-04-26 at 05:29 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission possible.
  • Possible volcanic ash emission not observation from satellite due to weather no rcnt repeats received. No hotspot detected. Model winds exp to mostly southwest through t+6 hours. Brown.

Original Message :

Volcanic Ash Advisory issued on 2023-04-25 at 23:26 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Volcanic ash emission observation in satellite img move se ext about 15 nmi from summit. Also new volcanic ash emission observation move wsw ext at least 50 nmi from summit. And mvmt based on satellite and nwp. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-25 at 17:53 UTC.

    Key information extracted from original VAA message :


  • Poss volcanic ash emission.
  • No new volcanic ash emission observation in satellite but occasional volcanic ash emission may continue. Model guidance suggests e mvmt from summit to shift ese by t+6. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-25 at 12:15 UTC.

    Key information extracted from original VAA message :


  • Occasional volcanic ash emission.
  • Volcanic ash obsd moving e among weather cloud cover. Volcanic ash emission likely to continue through t+18hrs with wshift forecast to move volcanic ash se by t+12hrs. Summit obscured by weather cloud cover on webcam. Hosley.

Original Message :

Volcanic Ash Advisory issued on 2023-04-25 at 06:10 UTC.

    Key information extracted from original VAA message :


  • Poss volcanic ash emission.
  • Volcanic ash is currently not observation on satellite due to dense weather clds, but is likely in the area the recent activity. Volcanic ash is based on nwp model wind and prev vaa. Zhu.

Original Message :

Volcanic Ash Advisory issued on 2023-04-25 at 00:20 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Vona received. Volcanic ash emission observation in satellite move north east ext about 15 nmi from summit. Also volcanic ash emission observation move nw ext at least 30 nmi from summit. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-24 at 18:24 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Volcanic ash emission observation in webcam and satellite img move ene and ext about 40 nmi from summit. Mvmt to shift nw by t+18. And mvmt based on satellite and nwp. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-24 at 12:30 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash seen in satellite and webcam.
  • Volcanic ash seen in satellite and webcam move e/ene and extend around 15 nm from summit. Nwp guidance indicates a more north east move by t+6 hours. Move and height based on satellite and nwp. Kibler.

Original Message :

Volcanic Ash Advisory issued on 2023-04-24 at 06:46 UTC.

    Key information extracted from original VAA message :


  • Light volcanic ash emission observation.
  • Volcanic ash from earlier emission has disp. Light volcanic ash emission observation move w in satellite imagery. Light volcanic ash forecast to continue w move from summit through t+6hrs before disp. Volcano activity moderate. Fisher.

Original Message :

Volcanic Ash Advisory issued on 2023-04-24 at 00:55 UTC.

    Key information extracted from original VAA message :


  • Poss volcanic ash emission.
  • No new volcanic ash emission observation in satellite img but occasional volcanic ash emission likely to continue. Previous volcanic ash emission has dissipated. Model guidance suggests wnw mvmt through t+6. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-23 at 19:04 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash emission observation.
  • Volcanic ash emission observation in satellite img move w ext at least 40 nmi from summit. Occasional volcanic ash emission may continue. Model guidance suggests a more wnw mvmt by t+6. Gatling.

Original Message :

Volcanic Ash Advisory issued on 2023-04-23 at 02:41 UTC.

    Key information extracted from original VAA message :


  • Volcanic ash fms ended.
  • Volcanic ash from earlier emission dispersed. No new activity noted in satellite imagery due to dense thunderstorm related cloud cover in the region. Nothing seen in web cam. No new reports. Lee.

Original Message :

Volcanic Ash Advisory issued on 2023-04-22 at 20:53 UTC.

    Key information extracted from original VAA message :


  • Frequent em.
  • Va, if present, cannot be distinguished from convection. Observation volcanic ash based on prev t+6 and nwp models that suggest little change for the next 6. Turk.

Original Message :