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
 

21st of March 2021, 7 months ago

2021-03-21 23:21:00 UTC Orange

Ibu - 20210321/2321Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 7 months ago

Eruption with volcanic ash-cloud at 2320 UTC (0820 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. Grey ash-cloud moving to north.

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8th of February 2021, 8 months ago

2021-02-08 02:01:00 UTC Orange

Ibu - 20210208/0201Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud at 0143 UTC (1043 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. Grey ash-cloud moving to south..

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4th of February 2021, 8 months ago

2021-02-04 22:40:00 UTC Orange

Ibu - 20210204/2240Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 8 months ago

Eruption with volcanic ash-cloud at 2228 UTC (0728 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. Grey ash-cloud moving to west.

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7th of January 2021, 9 months ago

2021-01-07 01:55:00 UTC Orange

Ibu - 20210107/0155Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 9 months ago

Eruption with volcanic ash-cloud at 0158 UTC (1058 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. Grey ash-cloud moving to north.

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19th of December 2020, 10 months ago

2020-12-19 09:32:00 UTC Orange

Ibu - 20201219/0932Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 10 months ago

Eruption with volcanic ash-cloud at 0926 UTC (1826 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. White to grey ash-cloud moving to north.

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4th of December 2020, 10 months ago

2020-12-04 06:15:00 UTC Orange

Ibu - 20201204/0615Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 10 months ago

Eruption with volcanic ash cloud at 0617 UTC (1517 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. Grey ash-cloud moving to east.

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27th of November 2020, 10 months ago

2020-11-27 09:19:00 UTC Orange

Ibu - 20201127/0919Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 10 months ago

Eruption with volcanic ash cloud at 0918 UTC (1818 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. Grey ash-cloud moving to west.

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18th of November 2020, 11 months ago

2020-11-18 22:25:00 UTC Orange

Ibu - 20201118/2225Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 11 months ago

Eruption with volcanic ash-cloud at 2221 UTC (0721 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. Grey ash-cloud moving to West.

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13th of November 2020, 11 months ago

2020-11-13 00:51:00 UTC Orange

Ibu - 20201113/0051Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 11 months ago

Eruption with volcanic ash-cloud at 0040 UTC (0940 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. White to grey ash-cloud moving to south.

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27th of September 2020, 1 year ago

2020-09-27 22:09:00 UTC Orange

Ibu - 20200927/2209Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash-cloud at 2054 UTC (0554 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. White to grey ash-cloud moving to north..

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26th of September 2020, 1 year ago

2020-09-26 23:20:00 UTC Orange

Ibu - 20200926/2320Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash-cloud at 2141 UTC ( 0641 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. White to grey ash-cloud moving to north..

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25th of September 2020, 1 year ago

2020-09-25 22:54:00 UTC Orange

Ibu - 20200925/2254Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2054 UTC (0554 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. White to grey ash-cloud moving to south..

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20th of September 2020, 1 year ago

2020-09-20 22:33:00 UTC Orange

Ibu - 20200920/2233Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2113 UTC (0613 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 August 2020, 1 year ago

2020-08-05 09:04:00 UTC Orange

Ibu - 20200805/0904Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0850(1750 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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19th of May 2020, 1 year ago

2020-05-19 22:43:00 UTC Orange

Ibu - 20200519/2243Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2213 UTC (0713 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. White to grey ash-cloud moving to west.

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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.