VONA
What is VONA?

VONA stands for Volcano Observatory Notice for Aviation. It issues reports for changes, both increases and decreases, in volcanic activities, providing a description on the nature of the unrest or eruption, potential or current hazards as well as likely outcomes. See the following link (USGS) for further details. The Center for Volcanology and Geological Hazard Mitigation (CVGHM) under the Geological Agency of the Indonesian Ministry of Energy and Mineral Resources produced VONA's reports based on analysis of data from the agency's monitoring networks as well as from direct observations. VONA's alert levels are color-coded to indicate the different types of notifications addressing specific informative needs. The reports are disseminated via email to national and international stakeholders in the aviation sector. Other interested parties can avail of them through email subscription. All notifications are publicly available online.

USGS
 

1st of August 2016, 5 years ago

2016-08-01 23:29:00 UTC Yellow

Dukono - 20160801/2329Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1623 UTC (0723 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to south..

View
 

31st of July 2016, 5 years ago

2016-07-31 00:33:00 UTC Yellow

Dukono - 20160731/0033Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1710 UTC (0810 local). Eruption with ash emission is continuing. Best estimate of ash-cloud top is around 14035 FT (4253 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to north..

View
 

30th of July 2016, 5 years ago

2016-07-30 00:44:00 UTC Yellow

Dukono - 20160730/0044Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1805 UTC (0905 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 15619 FT (4733 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..

View
 

29th of July 2016, 5 years ago

2016-07-29 00:05:00 UTC Yellow

Dukono - 20160729/0005Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1610 UTC (0710 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 15091 FT (4573 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..

View
 

27th of July 2016, 5 years ago

2016-07-27 22:13:00 UTC Yellow

Dukono - 20160727/2213Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1635 UTC (0735 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 15619 FT (4733 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to north and east.

View
 

26th of July 2016, 5 years ago

2016-07-26 23:00:00 UTC Yellow

Dukono - 20160726/2300Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1625 UTC (0725 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 15091 FT (4573 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..

View
 

25th of July 2016, 5 years ago

2016-07-25 22:02:00 UTC Yellow

Dukono - 20160725/2202Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1553 UTC (0653 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 17731 FT (5373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..

View
2016-07-25 00:14:00 UTC Orange

Dukono - 20160725/0014Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1525 UTC (0625 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..

View
 

22nd of July 2016, 5 years ago

2016-07-22 22:13:00 UTC Orange

Dukono - 20160722/2213Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud at 1559 UTC (0659 Local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 22483 FT (6813 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to southwest..

View
 

21st of July 2016, 5 years ago

2016-07-21 22:27:00 UTC Orange

Dukono - 20160721/2227Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1515 UTC (0615 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west..

View
 

20th of July 2016, 5 years ago

2016-07-20 23:22:00 UTC Yellow

Dukono - 20160720/2322Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1553 UTC (0653 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west..

View
 

19th of July 2016, 5 years ago

2016-07-19 23:37:00 UTC Orange

Dukono - 20160719/2337Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 1609 UTC (0709 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west..

View
 

18th of July 2016, 5 years ago

2016-07-18 23:07:00 UTC Orange

Dukono - 20160718/2307Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud observed at 1608 UTC (0708 Local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to northwest..

View
 

17th of July 2016, 5 years ago

2016-07-17 23:06:00 UTC Yellow

Dukono - 20160717/2306Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 1608 UTC (0708 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving west-southwest.

View
 

16th of July 2016, 5 years ago

2016-07-16 21:52:00 UTC Orange

Dukono - 20160716/2152Z 

Martanto, S.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 1930 UTC (0430 Local).Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to southwest..

View
VONA Color Code

Volcano is in normal, non-eruptive state, or, after a change from a higher level: Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.


Volcano is experiencing signs of elevated unrest above known background levels, or, after a change from higher level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.


Volcano is exhibiting heightened unrest with increased likelihood of eruption with column height below 6000 meter above sea level.


Eruption is forecast to be imminent with significant emission of ash with column height above 6000 meter above sea level.