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
 

27th of November 2020, 1 day ago

2020-11-27 23:45:00 UTC Orange

Dukono - 20201127/2345Z 

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

Eruption with volcanic ash cloud at 2336 UTC (0836 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 east..

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

Ibu - 20201127/0919Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 17 hours ago

Eruption with volcanic ash cloud at 0918 UTC (1818 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 west.

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26th of November 2020, 2 days ago

2020-11-26 22:27:00 UTC Orange

Ili Lewotolok - 20201126/2227Z 

Syarif Abdul Manaf, A.Md., Ili Lewotolok Volcano Observatory - 1 day ago

Eruption with volcanic ash cloud at 2157 UTC (0557 local). Eruption and ash emission is still continuing Best estimate of ash-cloud top is around 6154 FT (1923 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 November 2020, 3 days ago

2020-11-25 10:45:00 UTC Orange

Sinabung - 20201125/1045Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 2 days ago

Eruption with volcanic ash cloud at 1034 UTC (1734 local). Best estimate of ash-cloud top is around 9472 FT (2960 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south - west..

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2020-11-25 03:32:00 UTC Orange

Dukono - 20201125/0332Z 

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

Eruption with volcanic ash cloud at 2222 UTC (0722 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 east..

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22nd of November 2020, 6 days ago

2020-11-22 22:59:00 UTC Orange

Dukono - 20201122/2259Z 

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

Eruption with volcanic ash cloud at 2146 UTC (0646 local). Best estimate of ash-cloud top is around 6493 FT (2029 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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21st of November 2020, 1 week ago

2020-11-21 14:39:00 UTC Orange

Sinabung - 20201121/1439Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 6 days ago

Eruption with volcanic ash cloud at 1437 UTC (2137 local). Ash-cloud not visible. volcano cloudy.

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19th of November 2020, 1 week ago

2020-11-19 23:25:00 UTC Orange

Dukono - 20201119/2325Z 

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

Eruption with volcanic ash cloud at 2214 UTC (0714 local). Best estimate of ash-cloud top is around 6173 FT (1929 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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18th of November 2020, 1 week ago

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

Ibu - 20201118/2225Z 

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

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

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2020-11-18 06:45:00 UTC Orange

Sinabung - 20201118/0645Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 0644 UTC (1344 local). Best estimate of ash-cloud top is around 11072 FT (3460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south-west..

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17th of November 2020, 1 week ago

2020-11-17 23:34:00 UTC Orange

Semeru - 20201117/2334Z 

Liswanto, A.P., Semeru Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 2336 UTC ( 0636 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 south.

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13th of November 2020, 2 weeks ago

2020-11-13 01:24:00 UTC Orange

Dukono - 20201113/0124Z 

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

Eruption with volcanic ash cloud at 2303 UTC (0803 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 south..

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

Ibu - 20201113/0051Z 

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

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

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12th of November 2020, 2 weeks ago

2020-11-12 02:14:00 UTC Orange

Semeru - 20201112/0214Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 0221 UTC (0921 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 south.

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11th of November 2020, 2 weeks ago

2020-11-11 23:00:00 UTC Orange

Dukono - 20201111/2300Z 

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

Eruption with volcanic ash cloud at 2133 UTC (0633 local). Best estimate of ash-cloud top is around 6493 FT (2029 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. -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.