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
 

2nd of June 2020, 1 day ago

2020-06-02 23:29:00 UTC Orange

Dukono - 20200602/2329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 14 hours ago

Eruption with volcanic ash cloud at 2221 UTC (0721 local). Best estimate of ash-cloud top is around 5853 FT (1829 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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2020-06-02 22:32:00 UTC Orange

Semeru - 20200602/2232Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 15 hours ago

Eruption with volcanic ash cloud at 2233 UTC (0533 local) Best estimate of ash-cloud top is around 12403 FT (3876 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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2020-06-02 01:44:00 UTC Orange

Semeru - 20200602/0144Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 1 day ago

Eruption with volcanic ash cloud at 0146 UTC (0846 local) Best estimate of ash-cloud top is around 12723 FT (3976 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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1st of June 2020, 2 days ago

2020-06-01 23:35:00 UTC Orange

Dukono - 20200601/2335Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 day ago

Eruption with volcanic ash cloud at 2324 UTC (0824 local). Best estimate of ash-cloud top is around 5213 FT (1629 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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31st of May 2020, 3 days ago

2020-05-31 23:46:00 UTC Orange

Dukono - 20200531/2346Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 2 days ago

Eruption with volcanic ash cloud at 2225 UTC (0725 local). Best estimate of ash-cloud top is around 5213 FT (1629 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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2020-05-31 07:16:00 UTC Orange

Dukono - 20200531/0716Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 3 days ago

Eruption with volcanic ash cloud at 0440 UTC (1340 local). Best estimate of ash-cloud top is around 4573 FT (1429 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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30th of May 2020, 4 days ago

2020-05-30 22:49:00 UTC Orange

Semeru - 20200530/2249Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 3 days ago

Eruption with volcanic ash cloud at 2252 UTC (0552 local) Best estimate of ash-cloud top is around 12723 FT (3976 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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2020-05-30 01:09:00 UTC Orange

Semeru - 20200530/0109Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 4 days ago

Eruption with volcanic ash cloud at 0111 UTC( 0811 local) Best estimate of ash-cloud top is around 13363 FT (4176 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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2020-05-30 00:24:00 UTC Orange

Dukono - 20200530/0024Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 4 days ago

Eruption with volcanic ash cloud at 2222 UTC (0722 local). Best estimate of ash-cloud top is around 4573 FT (1429 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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29th of May 2020, 5 days ago

2020-05-29 00:26:00 UTC Orange

Dukono - 20200529/0026Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 5 days ago

Eruption with volcanic ash cloud at 2353 UTC (0853 local). Best estimate of ash-cloud top is around 4893 FT (1529 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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28th of May 2020, 6 days ago

2020-05-28 23:22:00 UTC Orange

Semeru - 20200528/2322Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 5 days ago

Eruption with volcanic ash cloud at 2319 UTC (0619 local). Best estimate of ash-cloud top is around 13363 FT (4176 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 2020, 1 week ago

2020-05-26 09:35:00 UTC Orange

Dukono - 20200526/0935Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 0924 UTC (1824 local). Best estimate of ash-cloud top is around 5533 FT (1729 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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25th of May 2020, 1 week ago

2020-05-25 22:59:00 UTC Orange

Semeru - 20200525/2259Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 2258 UTC (0558 local). Best estimate of ash-cloud top is around 12723 FT (3976 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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2020-05-25 08:02:00 UTC Orange

Dukono - 20200525/0802Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 0756 UTC (1656 local). Best estimate of ash-cloud top is around 5853 FT (1829 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. -cloud moving to south, southwest.

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24th of May 2020, 1 week ago

2020-05-24 22:36:00 UTC Orange

Semeru - 20200524/2236Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 2235 UTC (0535 local) Best estimate of ash-cloud top is around 13043 FT (4076 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.