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
 

25th of September 2020, 1 day ago

2020-09-25 22:54:00 UTC Orange

Ibu - 20200925/2254Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 hours ago

Eruption with volcanic ash cloud at 2054 UTC (0554 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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20th of September 2020, 6 days ago

2020-09-20 22:33:00 UTC Orange

Ibu - 20200920/2233Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 days ago

Eruption with volcanic ash cloud at 2113 UTC (0613 local). Best estimate of ash-cloud top is around 4880 FT (1525 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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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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19th of May 2020, 4 months ago

2020-05-19 22:43:00 UTC Orange

Ibu - 20200519/2243Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 2213 UTC (0713 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. White to grey ash-cloud moving to west.

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15th of May 2020, 4 months ago

2020-05-15 22:58:00 UTC Orange

Ibu - 20200515/2258Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 2250 UTC (0750 local) Best estimate of ash-cloud top is around 5200 FT (1625 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 west.

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12th of May 2020, 4 months ago

2020-05-12 03:00:00 UTC Orange

Ibu - 20200512/0300Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 0152 UTC ( 1052 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. Ash-cloud moving to north.

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4th of May 2020, 4 months ago

2020-05-04 01:30:00 UTC Orange

Ibu - 20200504/0130Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 0122 UTC (1022 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 north.

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2nd of May 2020, 4 months ago

2020-05-02 10:03:00 UTC Orange

Ibu - 20200502/1003Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash cloud at 0953 UTC (1853 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. Ash-cloud moving to North.

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9th of April 2020, 5 months ago

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

Ibu - 20200409/0404Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 0406 UTC (1306 local time) 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. White to grey ash cloud moving to south.

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28th of March 2020, 5 months ago

2020-03-28 23:56:00 UTC Orange

Ibu - 20200328/2356Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 2355 UTC (0855 local time) 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 north.

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27th of March 2020, 5 months ago

2020-03-27 21:49:00 UTC Orange

Ibu - 20200327/2149Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 2142 UTC (0642 local time) Best estimate of ash-cloud top is around 5200 FT (1625 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 north.

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26th of March 2020, 6 months ago

2020-03-26 08:37:00 UTC Orange

Ibu - 20200326/0837Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 0830 UTC (1730 local time) 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. Grey ash-cloud moving to West.

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10th of March 2020, 6 months ago

2020-03-10 01:51:00 UTC Orange

Ibu - 20200310/0151Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash cloud at 0144 UTC (1044 local). Best estimate of ash-cloud top is around 5520 FT (1725 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 east..

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20th of February 2020, 7 months ago

2020-02-20 02:20:00 UTC Orange

Ibu - 20200220/0220Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 7 months ago

Eruption with volcanic ash cloud at 0213 UTC (1113 local) Best estimate of ash-cloud top is around 5520 FT (1725 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 southeast.

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16th of February 2020, 7 months ago

2020-02-16 11:19:00 UTC Orange

Ibu - 20200216/1119Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 7 months ago

Eruption with volcanic ash cloud at 0915 UTC (1815 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. Ash-cloud moving to west.

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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.