Overall Green Volcanic eruption alert for Merapi in Indonesia on 21 Jun 2021 00:00 UTC

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)

24 Jun 23:30 29 Jun 05:20

29/06 05:20 2021-15

24/06 23:30 2021-14

Volcanic Ash Advisory issued on 2021-06-29 at 05:20 UTC.

Key information extracted from original VAA message :

Aviation Colour Code :

Volcanic ash reported to flight level 120 (3600m) at 29 0450 UTC.
Cvghm reported eruption to flight level 120 (3600m) volcanic ash unidentifiable on satellite imagery due to meteorological cloud. Height and winds based on 29 0450 UTC ground report, himawari-8 29 0500 UTC imagery and model guidance.

Original Message :

Received FVAU02 at 05:18 UTC, 29/06/21 from ADRM
VA ADVISORY
DTG: 20210629/0520Z
VAAC: DARWIN
VOLCANO: MERAPI 263250
PSN: S0733 E11027
AREA: INDONESIA
SUMMIT ELEV: 2968M
ADVISORY NR: 2021/15
INFO SOURCE: HIMAWARI-8, CVGHM
AVIATION COLOUR CODE: ORANGE
ERUPTION DETAILS: VA REPORTED TO FL120 AT 29/0450Z
EST VA DTG: 29/0500Z
EST VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND
SFC/FL120 090/15KT
FCST VA CLD +6 HR: 29/1100Z NOT AVBL
FCST VA CLD +12 HR: 29/1700Z NOT AVBL
FCST VA CLD +18 HR: 29/2300Z NOT AVBL
RMK: CVGHM REPORTED ERUPTION TO FL120. VA UNIDENTIFIABLE ON
SATELLITE IMAGERY DUE TO MET CLOUD. HEIGHT AND WINDS BASED
ON 29/0450Z GROUND REPORT, HIMAWARI-8 29/0500Z IMAGERY AND
MODEL GUIDANCE.
NXT ADVISORY: NO FURTHER ADVISORIES=

Volcanic Ash Advisory issued on 2021-06-24 at 23:30 UTC.

Key information extracted from original VAA message :

Aviation Colour Code :

Volcanic ash reported to flight level 130 (3900m) at 24 2144 UTC.
Cvghm report eruption to 1000m above summit. Volcanic ash unidentifiable on satellite imagery due to meteorological cloud, but confirmed by seismogram. Height and winds based on ground report and model guidance. Advisory will be reissued if new information is received.

Original Message :

Received FVAU02 at 23:27 UTC, 24/06/21 from ADRM
VA ADVISORY
DTG: 20210624/2330Z
VAAC: DARWIN
VOLCANO: MERAPI 263250
PSN: S0733 E11027
AREA: INDONESIA
SUMMIT ELEV: 2968M
ADVISORY NR: 2021/14
INFO SOURCE: HIMAWARI-8, SEISMOGRAM, CVGHM
AVIATION COLOUR CODE: ORANGE
ERUPTION DETAILS: VA REPORTED TO FL130 AT 24/2144Z
OBS VA DTG: 24/2300Z
OBS VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND
SFC/FL130 345/10KT
FCST VA CLD +6 HR: 25/0500Z NOT AVBL
FCST VA CLD +12 HR: 25/1100Z NOT AVBL
FCST VA CLD +18 HR: 25/1700Z NOT AVBL
RMK: CVGHM REPORT ERUPTION TO 1000M ABOVE SUMMIT. VA
UNIDENTIFIABLE ON SATELLITE IMAGERY DUE TO MET CLOUD, BUT
CONFIRMED BY SEISMOGRAM. HEIGHT AND WINDS BASED ON GROUND
REPORT AND MODEL GUIDANCE. ADVISORY WILL BE REISSUED IF NEW
INFORMATION IS RECEIVED.
NXT ADVISORY: NO FURTHER ADVISORIES=

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