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
 

24th of April 2022, 3 weeks ago

2022-04-24 12:13:00 UTC Orange

Ibu - 20220424/1213Z 

Axl Roeroe, Ibu Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 1210 UTC (2110 local). Best estimate of ash-cloud top is around 7440 FT (2325 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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23rd of April 2022, 4 weeks ago

2022-04-23 00:30:00 UTC Orange

Ibu - 20220423/0030Z 

Axl Roeroe, Ibu Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 0020 UTC (0920 local). Best estimate of ash-cloud top is around 7440 FT (2325 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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21st of April 2022, 1 month ago

2022-04-21 23:45:00 UTC Orange

Ibu - 20220421/2345Z 

Axl Roeroe, Ibu Volcano Observatory - 4 weeks ago

Eruption with volcanic ash cloud at 2337 UTC (0837 local). Best estimate of ash-cloud top is around 9040 FT (2825 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 April 2022, 1 month ago

2022-04-14 00:35:00 UTC Orange

Ibu - 20220414/0035Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0031 UTC (0931 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 northeast..

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30th of March 2022, 1 month ago

2022-03-30 02:14:00 UTC Orange

Ibu - 20220330/0214Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0148 UTC (1048 local). Best estimate of ash-cloud top is around 7440 FT (2325 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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25th of March 2022, 1 month ago

2022-03-25 00:35:00 UTC Orange

Ibu - 20220325/0035Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0034 UTC (0934 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 south..

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22nd of March 2022, 1 month ago

2022-03-22 01:08:00 UTC Orange

Ibu - 20220322/0108Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0100 UTC (1000 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 southeast..

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13th of March 2022, 2 months ago

2022-03-13 00:47:00 UTC Orange

Ibu - 20220313/0047Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0046 UTC (0946 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 southeast..

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12th of March 2022, 2 months ago

2022-03-12 08:14:00 UTC Orange

Ibu - 20220312/0814Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0811 UTC (1711 local). Best estimate of ash-cloud top is around 7440 FT (2325 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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10th of March 2022, 2 months ago

2022-03-10 01:31:00 UTC Orange

Ibu - 20220310/0131Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0127 UTC (1027 local). Best estimate of ash-cloud top is around 7440 FT (2325 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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2022-03-10 01:09:00 UTC Orange

Ibu - 20220310/0109Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0103 UTC (1003 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 east..

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2nd of March 2022, 2 months ago

2022-03-02 00:44:00 UTC Orange

Ibu - 20220302/0044Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0040 UTC (0940 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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23rd of February 2022, 2 months ago

2022-02-23 01:40:00 UTC Orange

Ibu - 20220223/0140Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0135 UTC (1035 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 southwest..

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2022-02-23 01:40:00 UTC Orange

Ibu - 20220223/0140Z 

Axl Roeroe, Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash cloud at 0135 UTC (1035 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 southwest..

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18th of February 2022, 3 months ago

2022-02-18 01:02:00 UTC Orange

Ibu - 20220218/0102Z 

Axl Roeroe, Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash cloud at 0056 UTC (09.56 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 southwest..

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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.