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
 

12th of August 2020, 1 month ago

2020-08-12 09:05:00 UTC Yellow

Kerinci - 20200812/0905Z 

Rudra Wibowo, A.Md., Kerinci Volcano Observatory - 1 month ago

On 12 Agustus 2020, observed brown ash emission at 09:02 UTC ( 16:02 Local Time ) Best estimate of ash-cloud top is around 15376 FT (4805 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Southeast-NorthEast.

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10th of August 2020, 1 month ago

2020-08-10 04:36:00 UTC Orange

Sinabung - 20200810/0436Z 

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

Eruption with volcanic ash cloud at 0417 UTC (1117 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 14272 FT (4460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east - southeast. .

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2020-08-10 03:27:00 UTC Red

Sinabung - 20200810/0327Z 

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

Eruption with volcanic ash cloud at 0316 UTC (1016 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 23872 FT (7460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east - southeast..

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9th of August 2020, 1 month ago

2020-08-09 04:39:00 UTC Yellow

Kerinci - 20200809/0439Z 

Rudra Wibowo, A.Md., Kerinci Volcano Observatory - 1 month ago

On 9 Agustus 2020, observed brown ash emission at 04:40 UTC ( 11:40 Local Time ). Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Northeast.

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2020-08-09 03:06:00 UTC Orange

Dukono - 20200809/0306Z 

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

Eruption with volcanic ash cloud at 0134 UTC (1034 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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8th of August 2020, 1 month ago

2020-08-08 23:13:00 UTC Orange

Semeru - 20200808/2313Z 

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

Eruption with volcanic ash cloud at 2318 UTC (0618 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 west.

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2020-08-08 10:45:00 UTC Orange

Sinabung - 20200808/1045Z 

Armen Putra, Sinabung Volcano Observatory - 1 month ago

Eruption with ash clouds at 10:18 UTC (17:18 local time). Eruption and ash emission is continuing. 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 east - southeast..

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2020-08-08 01:19:00 UTC Orange

Semeru - 20200808/0119Z 

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

Eruption with volcanic ash cloud at 0119 UTC (0819 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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7th of August 2020, 1 month ago

2020-08-07 23:23:00 UTC Orange

Sinabung - 20200807/2323Z 

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

Eruption with volcanic ash cloud at 1858 UTC (0158) local) Best estimate of ash-cloud top is around 14272 FT (4460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east - southeast..

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2020-08-07 23:05:00 UTC Orange

Semeru - 20200807/2305Z 

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

Eruption with volcanic ash cloud at 2303 UTC (0603) 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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2020-08-07 03:30:00 UTC Yellow

Kerinci - 20200807/0330Z 

Rudra Wibowo, A.Md., Kerinci Volcano Observatory - 1 month ago

On 7 Agustus 2020, observed brown ash emission at 03:24 UTC ( 10:24 Local Time ) Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Southeast-Northeast.

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2020-08-07 00:27:00 UTC Orange

Dukono - 20200807/0027Z 

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

Eruption with volcanic ash cloud at 2317 UTC ( 0817 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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6th of August 2020, 1 month ago

2020-08-06 01:19:00 UTC Orange

Dukono - 20200806/0119Z 

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

Eruption with volcanic ash cloud at 0114 UTC (1014 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 northeast.

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5th of August 2020, 1 month ago

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

Ibu - 20200805/0904Z 

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

Eruption with volcanic ash cloud at 0850(1750 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 north.

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4th of August 2020, 1 month ago

2020-08-04 00:39:00 UTC Orange

Dukono - 20200804/0039Z 

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

Eruption with volcanic ash cloud at 2302 UTC (0802 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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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.