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
 

7th of December 2016, 5 years ago

2016-12-07 23:36:00 UTC Orange

Dukono - 20161207/2336Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with ash cloud observed at 2224 UTC (0724 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. Dark grey ash cloud moving to east.

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2016-12-07 01:14:00 UTC Orange

Dukono - 20161207/0114Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Explosion occurred at 2332 UTC (0832 local), produced grey-black ash cloud Best estimate of ash-cloud top is around 23011 FT (6973 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east.

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2016-12-07 01:07:00 UTC Orange

Dukono - 20161207/0107Z 

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

Eruption with volcanic ash cloud at 2300 UTC (0800 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 35990 FT (10906 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east. White and grey colored. .

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1st of December 2016, 5 years ago

2016-12-01 00:58:00 UTC Orange

Dukono - 20161201/0058Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with dark-grey ash cloud observed at 2339 UTC (0839 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 to north..

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30th of November 2016, 5 years ago

2016-11-30 00:46:00 UTC Orange

Dukono - 20161130/0046Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption observed at 2253 UTC (0753 local) produced dark-grey ash cloud. 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 north.

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28th of November 2016, 5 years ago

2016-11-28 22:37:00 UTC Orange

Dukono - 20161128/2237Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption observed at 2138 UTC (0638 local), produced dark-grey ash cloud. Eruption and ash emission is continuing Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to south and southeast..

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26th of November 2016, 5 years ago

2016-11-26 22:42:00 UTC Orange

Dukono - 20161126/2242Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption produced dark-grey ash cloud observed at 2126 UTC (0626 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east-southeast.

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24th of November 2016, 5 years ago

2016-11-24 22:58:00 UTC Orange

Dukono - 20161124/2258Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Continuous eruption at 2237 UTC (0737 local) observed. Dark-grey ash cloud rose above the summit. 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.

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2016-11-24 08:46:00 UTC Orange

Dukono - 20161124/0846Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption produced dark-grey ash cloud observed at 2030 UTC (1730 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-northeast..

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21st of November 2016, 5 years ago

2016-11-21 22:23:00 UTC Orange

Dukono - 20161121/2223Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption produced white-grey ash cloud observed at 2157 UTC (0657 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 west.

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2016-11-21 09:31:00 UTC Orange

Dukono - 20161121/0931Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with dark-grey ash cloud observed at 0907 UTC (1807 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 south-west.

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2016-11-21 02:18:00 UTC Orange

Kerinci - 20161121/0218Z 

Sofyan Primulyana, S.T., M.T., Kerinci Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0131 UTC (0831 local time) Best estimate of ash-cloud top is around 45408 FT (13760 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Dark grey ash-cloud moving to east-northeast..

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20th of November 2016, 5 years ago

2016-11-20 01:14:00 UTC Orange

Dukono - 20161120/0114Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption produced dark-grey ash cloud observed at 2329 UTC (0829 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 to east-southeast.

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19th of November 2016, 5 years ago

2016-11-19 01:53:00 UTC Orange

Dukono - 20161119/0153Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with dark-grey ash cloud observed at 2347 UTC (0847 local). Ash emission and eruption 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..

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2016-11-19 00:13:00 UTC Orange

Dukono - 20161119/0013Z 

Devy Kamil Syahbana, Dr., S.Si., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0000 UTC (0900 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 is moving East..

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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.