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
 

15th of March 2019, 2 years ago

2019-03-15 00:54:00 UTC Orange

Bromo - 20190315/0054Z 

Rubiyo, Bromo Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud observed since 1300 UTC (0600 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 31987 FT (9693 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north, northeast and east..

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13th of March 2019, 2 years ago

2019-03-13 23:42:00 UTC Orange

Bromo - 20190313/2342Z 

Budi Marwanto, Bromo Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1300 UTC (0600 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 31987 FT (9693 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick brown and grey Ash-cloud moving to east, northeast, southeast .

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2019-03-13 00:35:00 UTC Orange

Bromo - 20190313/0035Z 

Rubiyo, Bromo Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud observed since 1300 UTC (0600 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 31987 FT (9693 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast, east and southeast..

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12th of March 2019, 2 years ago

2019-03-12 00:13:00 UTC Orange

Bromo - 20190312/0013Z 

Hadi Purwoko, A.Md.Kom., Bromo Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1100 UTC (0600 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick grey and brown Ash-cloud moving to south, southwest, west..

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11th of March 2019, 2 years ago

2019-03-11 00:53:00 UTC Orange

Bromo - 20190311/0053Z 

Wahyu Andrian Kusuma, Bromo Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 1400 UTC (0700 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. White brown and grey, thin to thick Ash-cloud moving to south-west-southwest.

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19th of February 2019, 2 years ago

2019-02-19 02:00:00 UTC Orange

Bromo - 20190219/0200Z 

Wahyu Andrian Kusuma, Bromo Volcano Observatory - 2 years ago

Eruption with volcanic ash cloud at 23:00 UTC (06:00 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick white and brown Ash-cloud moving to west-south west.

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19th of October 2016, 4 years ago

2016-10-19 01:12:00 UTC Yellow

Bromo - 20161019/0112Z 

Novia Antika Anggraeni, S.Si., Bromo Volcano Observatory - 4 years ago

Steam emission with sometimes ash material detected at 0110 UTC (0810 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud colored white - dark grey moving toward southwest..

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12th of July 2016, 4 years ago

2016-07-12 02:09:00 UTC Yellow

Bromo - 20160712/0209Z 

Martanto, S.T., Bromo Volcano Observatory - 4 years ago

Eruption with volcanic ash clouds at 23:04 UTC (06:04 local time), and the ash still continue. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud grey white to brown move to south-southeast and still continue..

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24th of May 2016, 5 years ago

2016-05-24 05:31:00 UTC Yellow

Bromo - 20160524/0531Z 

Martanto, S.T., Bromo Volcano Observatory - 5 years ago

Eruption happened in 24/05/2016 06:17 WIB with brown ash, and presure low, cloud height about 900 meters above summit, and move to the east Best estimate of ash-cloud top is around 34099 FT (10333 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash cloud move to the east with low presure.

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3rd of April 2016, 5 years ago

2016-04-03 04:52:00 UTC Orange

Bromo - 20160403/0452Z 

Martanto, S.T., Bromo Volcano Observatory - 5 years ago

Eruption with vulcanic ash above 600m from the summit or 2929m above sea level Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud white greay to brown move to south west and still continue.

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2016-04-03 04:21:00 UTC Orange

Bromo - 20160403/0421Z 

Martanto, S.T., Bromo Volcano Observatory - 5 years ago

Eruption with vulcanic ash above 600m from the summit or 2929m above sea level Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud white greay to brown move to south west and still continue.

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2016-04-03 04:07:00 UTC Yellow

Bromo - 20160403/0407Z 

Martanto, S.T., Bromo Volcano Observatory - 5 years ago

Eruption with vulconic ash above 600M from summit or 2929m above sea level and the ash still contuinue Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud grey white to brown move south west.

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2nd of April 2016, 5 years ago

2016-04-02 04:45:00 UTC Yellow

Bromo - 20160402/0445Z 

Martanto, S.T., Bromo Volcano Observatory - 5 years ago

High steam emissions (with sometimes contains ash material, although not everday) Best estimate of ash-cloud top is around 34099 FT (10333 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. high steam emissions with sometimes contains ash material, although not everday..

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2016-04-02 04:19:00 UTC Yellow

Bromo - 20160402/0419Z 

Martanto, S.T., Bromo Volcano Observatory - 5 years ago

Steam emission with sometimes ash material detected at 0110 UTC (0810 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud colored white - dark grey moving toward 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.