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
 

30th of September 2019, 1 year ago

2019-09-30 09:27:00 UTC Orange

Ibu - 20190930/0927Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0906 UTC (1806 local) Best estimate of ash-cloud top is around 22440 FT (6800 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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4th of September 2019, 2 years ago

2019-09-04 01:56:00 UTC Orange

Ibu - 20190904/0156Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0036 UTC (0936 local). Best estimate of ash-cloud top is around 17160 FT (5200 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to south.

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31st of August 2019, 2 years ago

2019-08-31 10:08:00 UTC Orange

Ibu - 20190831/1008Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0947 UTC (1847 local) Best estimate of ash-cloud top is around 22440 FT (6800 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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21st of August 2019, 2 years ago

2019-08-21 22:30:00 UTC Orange

Ibu - 20190821/2230Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 2204 UTC (07.04 local) Best estimate of ash-cloud top is around 22440 FT (6800 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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14th of August 2019, 2 years ago

2019-08-14 02:28:00 UTC Orange

Ibu - 20190814/0228Z 

David Adriansyah, S.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0207 UTC (1107 local) Best estimate of ash-cloud top is around 22440 FT (6800 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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14th of May 2019, 2 years ago

2019-05-14 10:26:00 UTC Orange

Ibu - 20190514/1026Z 

David Adriansyah, S.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud observed at 0946 UTC (1846 local) Best estimate of ash-cloud top is around 22440 FT (6800 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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9th of May 2019, 2 years ago

2019-05-09 10:07:00 UTC Orange

Ibu - 20190509/1007Z 

David Adriansyah, S.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud observed at 0921 UTC (1821 local). Best estimate of ash-cloud top is around 20328 FT (6160 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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6th of February 2019, 2 years ago

2019-02-06 10:02:00 UTC Orange

Ibu - 20190206/1002Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud observed at 0950 UTC (1850 local). Best estimate of ash-cloud top is around 20328 FT (6160 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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12th of January 2019, 2 years ago

2019-01-12 23:27:00 UTC Orange

Ibu - 20190112/2327Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 2301 UTC (0801 local). Best estimate of ash-cloud top is around 22440 FT (6800 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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11th of December 2018, 2 years ago

2018-12-11 05:18:00 UTC Orange

Ibu - 20181211/0518Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0457 UTC (1357 local). Best estimate of ash-cloud top is around 19272 FT (5840 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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22nd of October 2018, 2 years ago

2018-10-22 09:30:00 UTC Orange

Ibu - 20181022/0930Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0909 UTC (1809 local). Best estimate of ash-cloud top is around 18216 FT (5520 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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19th of October 2018, 2 years ago

2018-10-19 03:58:00 UTC Orange

Ibu - 20181019/0358Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0323 UTC (1223 local). Best estimate of ash-cloud top is around 18216 FT (5520 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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24th of August 2018, 3 years ago

2018-08-24 08:52:00 UTC Orange

Ibu - 20180824/0852Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0838 UTC (1738 local). Best estimate of ash-cloud top is around 22440 FT (6800 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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20th of August 2018, 3 years ago

2018-08-20 09:25:00 UTC Orange

Ibu - 20180820/0925Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0842 UTC (1742 local). Best estimate of ash-cloud top is around 26664 FT (8080 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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13th of August 2018, 3 years ago

2018-08-13 02:21:00 UTC Orange

Ibu - 20180813/0221Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0259 UTC (1159 local). Best estimate of ash-cloud top is around 22440 FT (6800 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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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.