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 June 2019, 1 year ago

2019-06-12 17:48:00 UTC Orange

Agung - 20190612/1748Z 

I Gede Bagiarta, ST, Agung Volcano Observatory - 1 year ago

Eruption with as cloud at 17.38 (01.38 local) Ash-cloud not visible. cannot observed.

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31st of May 2019, 1 year ago

2019-05-31 03:59:00 UTC Orange

Agung - 20190531/0359Z 

I Nengah Wardana, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 04.00 UTC (12.00 local). Best estimate of ash-cloud top is around 13254 FT (4142 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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24th of May 2019, 1 year ago

2019-05-24 11:27:00 UTC Orange

Agung - 20190524/1127Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1123 UTC (1923 local). Eruption and ash emission is not continuing Ash-cloud not visible. Ash cloud cannot be observed.

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17th of May 2019, 1 year ago

2019-05-17 18:18:00 UTC Orange

Agung - 20190517/1818Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1809 UTC (0209 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 16454 FT (5142 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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12th of May 2019, 1 year ago

2019-05-12 14:38:00 UTC Orange

Agung - 20190512/1438Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1429 UTC (2229 local). Eruption and ash emission is not continuing Ash-cloud not visible. Ash cloud cannot be observed.

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6th of May 2019, 1 year ago

2019-05-06 15:02:00 UTC Orange

Agung - 20190506/1502Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1455 UTC (2255 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 16454 FT (5142 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 May 2019, 1 year ago

2019-05-03 11:35:00 UTC Orange

Agung - 20190503/1135Z 

I Nengah Wardana, Agung Volcano Observatory - 1 year ago

Eruption recorded at 1059 UTC (1859 local). Ash-cloud not visible. Ash-cloud is not visible from Agung Volcano Observatory at Rendang (south of the volcano).

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29th of April 2019, 1 year ago

2019-04-29 21:48:00 UTC Orange

Agung - 20190429/2148Z 

I Nengah Wardana, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2134 UTC (0534 local). Best estimate of ash-cloud top is around 13254 FT (4142 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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21st of April 2019, 1 year ago

2019-04-21 13:41:00 UTC Orange

Agung - 20190421/1341Z 

Martanto, S.T., Agung Volcano Observatory - 1 year ago

Eruption has ceased. Ash-cloud not visible. Eruption has ceased. .

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2019-04-21 11:06:00 UTC Red

Agung - 20190421/1106Z 

Nurul Husaeni, A.Md., Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1056 UTC (1856 Local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 19654 FT (6142 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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20th of April 2019, 1 year ago

2019-04-20 20:15:00 UTC Orange

Agung - 20190420/2015Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1921 UTC (0321 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 16454 FT (5142 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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11th of April 2019, 1 year ago

2019-04-11 10:54:00 UTC Orange

Agung - 20190411/1054Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1047 UTC (1847 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 16454 FT (5142 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 April 2019, 1 year ago

2019-04-03 17:40:00 UTC Orange

Agung - 20190403/1740Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1731 UTC (0131 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 16454 FT (5142 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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28th of March 2019, 1 year ago

2019-03-28 10:31:00 UTC Orange

Agung - 20190328/1031Z 

Nurul Husaeni, A.Md., Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1025 UTC (1825 local). Eruption and ash emission is not continuing Ash-cloud not visible. Ash-cloud cannot be observed.

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20th of March 2019, 1 year ago

2019-03-20 16:26:00 UTC Orange

Agung - 20190320/1626Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1618 UTC (0018 local). Eruption and ash emission is not continuing. Ash-cloud not visible. Ash-cloud cannot be observed.

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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.