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
 

17th of June 2017, 4 years ago

2017-06-17 22:54:00 UTC Orange

Ibu - 20170617/2254Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2213 UTC (0713 local). Best estimate of ash-cloud top is around 15576 FT (4720 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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2017-06-17 01:10:00 UTC Orange

Ibu - 20170617/0110Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2152 UTC (0652 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 south..

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14th of June 2017, 4 years ago

2017-06-14 00:33:00 UTC Orange

Ibu - 20170614/0033Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 0015 UTC (0915 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 Southwest..

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12th of June 2017, 4 years ago

2017-06-12 00:32:00 UTC Orange

Ibu - 20170612/0032Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2345 UTC (0845 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 West..

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11th of June 2017, 4 years ago

2017-06-11 01:41:00 UTC Orange

Ibu - 20170611/0141Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2340 UTC (0840 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. Ash cloud moving to South..

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10th of June 2017, 4 years ago

2017-06-10 00:30:00 UTC Orange

Ibu - 20170610/0030Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2332 UTC (0832 local). Best estimate of ash-cloud top is around 17688 FT (5360 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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9th of June 2017, 4 years ago

2017-06-09 00:29:00 UTC Orange

Ibu - 20170609/0029Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2359 UTC (0859 local). Best estimate of ash-cloud top is around 16104 FT (4880 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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5th of June 2017, 4 years ago

2017-06-05 00:21:00 UTC Orange

Ibu - 20170605/0021Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash at 2358 UTC (0858 local). Best estimate of ash-cloud top is around 15576 FT (4720 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to southeast..

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1st of June 2017, 4 years ago

2017-06-01 00:28:00 UTC Orange

Ibu - 20170601/0028Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2259 UTC (0759 local). Best estimate of ash-cloud top is around 16632 FT (5040 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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26th of May 2017, 4 years ago

2017-05-26 02:50:00 UTC Orange

Ibu - 20170526/0250Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 0151 UTC (1051 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 southeast..

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22nd of May 2017, 4 years ago

2017-05-22 22:47:00 UTC Orange

Ibu - 20170522/2247Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2236 UTC (0736 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. Ash cloud moving to south..

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20th of May 2017, 4 years ago

2017-05-20 03:26:00 UTC Orange

Ibu - 20170520/0326Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 0312 UTC (1212 local). Best estimate of ash-cloud top is around 16104 FT (4880 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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18th of May 2017, 4 years ago

2017-05-18 23:32:00 UTC Orange

Ibu - 20170518/2332Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2313 UTC (0813 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 north..

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16th of May 2017, 4 years ago

2017-05-16 01:38:00 UTC Orange

Ibu - 20170516/0138Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 0038 UTC (0938 local). Best estimate of ash-cloud top is around 16632 FT (5040 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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10th of May 2017, 4 years ago

2017-05-10 23:27:00 UTC Orange

Ibu - 20170510/2327Z 

Nia Haerani, Dr. S.T., M.T., Ibu Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 2252 UTC (0752 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 Southeast..

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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.