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
 

20th of February 2020, 6 days ago

2020-02-20 02:20:00 UTC Orange

Ibu - 20200220/0220Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 days ago

Eruption with volcanic ash cloud at 0213 UTC (1113 local) Best estimate of ash-cloud top is around 5520 FT (1725 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. White to grey ash-cloud moving to southeast.

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16th of February 2020, 1 week ago

2020-02-16 11:19:00 UTC Orange

Ibu - 20200216/1119Z 

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

Eruption with volcanic ash cloud at 0915 UTC (1815 local). Best estimate of ash-cloud top is around 6800 FT (2125 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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3rd of December 2019, 2 months ago

2019-12-03 01:31:00 UTC Orange

Ibu - 20191203/0131Z 

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

Eruption with volcanic ash cloud at 0008 UTC (0908 local). Best estimate of ash-cloud top is around 6800 FT (2125 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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2019-12-03 00:57:00 UTC Orange

Ibu - 20191203/0057Z 

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

Eruption with volcanic ash cloud at 0008 UTC (0908 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. White to grey ash-cloud moving to North..

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25th of November 2019, 3 months ago

2019-11-25 10:01:00 UTC Orange

Ibu - 20191125/1001Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash cloud at 0921 UTC ( 1821 local). Best estimate of ash-cloud top is around 5200 FT (1625 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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20th of November 2019, 3 months ago

2019-11-20 03:58:00 UTC Orange

Ibu - 20191120/0358Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash cloud at 0159 UTC (1059 local). Best estimate of ash-cloud top is around 6800 FT (2125 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 2019, 4 months ago

2019-10-19 23:52:00 UTC Orange

Ibu - 20191019/2352Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 2329 UTC (0829 local). Best estimate of ash-cloud top is around 5840 FT (1825 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 October 2019, 4 months ago

2019-10-14 23:10:00 UTC Orange

Ibu - 20191014/2310Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 2207 UTC (0707 local) Best estimate of ash-cloud top is around 5520 FT (1725 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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30th of September 2019, 4 months ago

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

Ibu - 20190930/0927Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 0906 UTC (1806 local) Best estimate of ash-cloud top is around 6800 FT (2125 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, 5 months ago

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

Ibu - 20190904/0156Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 0036 UTC (0936 local). Best estimate of ash-cloud top is around 5200 FT (1625 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, 5 months ago

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

Ibu - 20190831/1008Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 0947 UTC (1847 local) Best estimate of ash-cloud top is around 6800 FT (2125 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, 6 months ago

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

Ibu - 20190821/2230Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash cloud at 2204 UTC (07.04 local) Best estimate of ash-cloud top is around 6800 FT (2125 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, 6 months ago

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

Ibu - 20190814/0228Z 

David Adriansyah, S.T., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash cloud at 0207 UTC (1107 local) Best estimate of ash-cloud top is around 6800 FT (2125 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, 9 months ago

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

Ibu - 20190514/1026Z 

David Adriansyah, S.T., Ibu Volcano Observatory - 9 months ago

Eruption with volcanic ash cloud observed at 0946 UTC (1846 local) Best estimate of ash-cloud top is around 6800 FT (2125 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, 9 months ago

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

Ibu - 20190509/1007Z 

David Adriansyah, S.T., Ibu Volcano Observatory - 9 months ago

Eruption with volcanic ash cloud observed at 0921 UTC (1821 local). Best estimate of ash-cloud top is around 6160 FT (1925 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.