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
 

17th of March 2019, 2 years ago

2019-03-17 00:08:00 UTC Orange

Agung - 20190317/0008Z 

I Nengah Wardana, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0003 UTC (0803 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 38458 FT (11654 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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15th of March 2019, 2 years ago

2019-03-15 10:43:00 UTC Orange

Agung - 20190315/1043Z 

Nurul Husaeni, A.Md., Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 10:27 UTC (18:27 Local). Best estimate of ash-cloud top is around 43738 FT (13254 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash Cloud is moving to West.

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8th of March 2019, 2 years ago

2019-03-08 17:15:00 UTC Orange

Agung - 20190308/1715Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1647 UTC (0047 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 0 FT (0 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 February 2019, 2 years ago

2019-02-22 08:50:00 UTC Orange

Agung - 20190222/0850Z 

I Nengah Wardana, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0831 UTC (1631 local) Best estimate of ash-cloud top is around 40570 FT (12294 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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13th of February 2019, 2 years ago

2019-02-13 22:43:00 UTC Orange

Agung - 20190213/2243Z 

Nurul Husaeni, A.Md., Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 2034 UTC (0434 Local). Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud cannot be observed.

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7th of February 2019, 2 years ago

2019-02-07 16:28:00 UTC Orange

Agung - 20190207/1628Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1612 UTC (0012 local) Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud cannot be observed.

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22nd of January 2019, 2 years ago

2019-01-22 19:48:00 UTC Orange

Agung - 20190122/1948Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1918 UTC (0318 local) Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud cannot be observed.

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21st of January 2019, 2 years ago

2019-01-21 20:03:00 UTC Orange

Agung - 20190121/2003Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1942 UTC (0342 local) Best estimate of ash-cloud top is around 54298 FT (16454 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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2019-01-21 08:59:00 UTC Orange

Agung - 20190121/0859Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 0845 UTC (1645 local) Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud cannot be observed.

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18th of January 2019, 2 years ago

2019-01-18 19:23:00 UTC Orange

Agung - 20190118/1923Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1845 UTC (0245 local) Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud cannot be observed.

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10th of January 2019, 2 years ago

2019-01-10 12:23:00 UTC Orange

Agung - 20190110/1223Z 

Martanto, S.T., Agung Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1155 UTC (1955 Local) Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud cannot be observed..

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27th of July 2018, 3 years ago

2018-07-27 06:27:00 UTC Orange

Agung - 20180727/0627Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with emising gas ash cloud at 0606 UTC (1406Local), Eruption is not continue Best estimate of ash-cloud top is around 54298 FT (16454 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving to west.

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24th of July 2018, 3 years ago

2018-07-24 05:09:00 UTC Orange

Agung - 20180724/0509Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0452 UTC (1252 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 49018 FT (14854 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south east.

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21st of July 2018, 3 years ago

2018-07-21 03:58:00 UTC Orange

Agung - 20180721/0358Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0349 UTC (1149 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 49018 FT (14854 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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15th of July 2018, 3 years ago

2018-07-15 01:17:00 UTC Orange

Agung - 20180715/0117Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0105 UTC (0905 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 49018 FT (14854 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west - southeast.

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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.