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
 

16th of November 2016, 5 years ago

2016-11-16 06:16:00 UTC Orange

Kerinci - 20161116/0616Z 

David Adriansyah, S.T., Kerinci Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0539 UTC (1239 local) Best estimate of ash-cloud top is around 50688 FT (15360 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 north-northeast..

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2016-11-16 04:04:00 UTC Orange

Kerinci - 20161116/0404Z 

David Adriansyah, S.T., Kerinci Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0135 UTC (0835 local) Best estimate of ash-cloud top is around 43296 FT (13120 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Brown-grey ash-cloud moving to east-northeast..

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14th of November 2016, 5 years ago

2016-11-14 10:18:00 UTC Orange

Dukono - 20161114/1018Z 

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

Eruption with volcanic ash cloud at 0920 UTC (1820 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-northeast..

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8th of November 2016, 5 years ago

2016-11-08 23:18:00 UTC Orange

Dukono - 20161108/2318Z 

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

Eruption with ash cloud observed at 2228 UTC (0728 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..

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4th of November 2016, 5 years ago

2016-11-04 23:06:00 UTC Orange

Dukono - 20161104/2306Z 

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

Eruption and ash emission is continuing. Eruption with ash cloud observed at 2227 UTC (0727 local). 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. White-grey ash cloud moving to north-northwest.

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31st of October 2016, 5 years ago

2016-10-31 00:33:00 UTC Orange

Dukono - 20161031/0033Z 

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

Eruption and ash emission is continuing. Dark-grey ash cloud observed at 2330 UTC (0830 local) Best estimate of ash-cloud top is around 16147 FT (4893 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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25th of October 2016, 5 years ago

2016-10-25 08:21:00 UTC Orange

Sinabung - 20161025/0821Z 

Heruningtyas Desi Purnamasari, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash clouds at 2208 UTC (1408 local time). The eruption lasted for 255 seconds. Best estimate of ash-cloud top is around 52378 FT (15872 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to southeast.

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24th of October 2016, 5 years ago

2016-10-24 23:02:00 UTC Orange

Dukono - 20161024/2302Z 

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

Eruption with ash cloud observed at 2155 UTC (0655 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. White-grey ash cloud moving to south-southwest..

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23rd of October 2016, 5 years ago

2016-10-23 23:00:00 UTC Orange

Dukono - 20161023/2300Z 

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

Eruption with ash cloud observed at 2120 UTC (0620 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 west..

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22nd of October 2016, 5 years ago

2016-10-22 23:04:00 UTC Orange

Dukono - 20161022/2304Z 

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

Eruption with ash cloud observed at 2219 UTC (0719 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 north-northwest..

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19th of October 2016, 5 years ago

2016-10-19 01:12:00 UTC Yellow

Bromo - 20161019/0112Z 

Novia Antika Anggraeni, S.Si., Bromo Volcano Observatory - 5 years ago

Steam emission with sometimes ash material detected at 0110 UTC (0810 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud colored white - dark grey moving toward southwest..

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18th of October 2016, 5 years ago

2016-10-18 23:11:00 UTC Orange

Dukono - 20161018/2311Z 

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

Eruption with ash cloud observed at 2211 UTC (0711 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..

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2016-10-18 00:29:00 UTC Orange

Dukono - 20161018/0029Z 

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

Eruption with ash cloud observed at 0012 UTC (0912 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..

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8th of October 2016, 5 years ago

2016-10-08 22:20:00 UTC Orange

Dukono - 20161008/2220Z 

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

Eruption with ash cloud observed at 2158 UTC (0658 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.

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6th of October 2016, 5 years ago

2016-10-06 22:42:00 UTC Orange

Dukono - 20161006/2242Z 

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

Eruption with ash cloud observed at 2222 UTC (0722 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 16147 FT (4893 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to south.

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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.