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
 

18th of January 2020, 1 month ago

2020-01-18 01:27:00 UTC Orange

Semeru - 20200118/0127Z 

Nia Haerani, Dr. S.T., M.T., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0025 UTC (0725 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 west.

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16th of January 2020, 1 month ago

2020-01-16 23:57:00 UTC Orange

Dukono - 20200116/2357Z 

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

Eruption with volcanic ash cloud at 2345 UTC (0845 local). Best estimate of ash-cloud top is around 5853 FT (1829 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 January 2020, 1 month ago

2020-01-15 23:48:00 UTC Orange

Dukono - 20200115/2348Z 

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

Eruption with volcanic ash cloud at 2246 UTC (0746 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 southeast..

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2020-01-15 05:01:00 UTC Orange

Anak Krakatau - 20200115/0501Z 

Deny Mardiono, A.Md., Anak Krakatau Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0318 UTC (1018 local). Ash-cloud not visible. visually from cctv crater seen volcanic ash moving to south, volcanic ash black thick 150 meters high from the bottom of the crater. .

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14th of January 2020, 1 month ago

2020-01-14 23:57:00 UTC Orange

Dukono - 20200114/2357Z 

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

Eruption with volcanic ash cloud at 2235 UTC (0735 local). Best estimate of ash-cloud top is around 5533 FT (1729 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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7th of January 2020, 1 month ago

2020-01-07 02:13:00 UTC Orange

Anak Krakatau - 20200107/0213Z 

Jumono, Anak Krakatau Volcano Observatory - 1 month ago

Recorded eruption at 00:36 UTC (07:36 local ) Best estimate of ash-cloud top is around 1142 FT (357 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. visually from cctv crater seen volcanic ash moving to east, volcanic ash white-gray thick 200 meters high from the bottom of the crater. .

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5th of January 2020, 1 month ago

2020-01-05 01:32:00 UTC Yellow

Kerinci - 20200105/0132Z 

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

On 5 January 2020, observed brown ash emission at 00:58 UTC (07:58 local time). Best estimate of ash-cloud top is around 13456 FT (4205 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash emission moving to East - Southeast..

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4th of January 2020, 1 month ago

2020-01-04 01:48:00 UTC Yellow

Kerinci - 20200104/0148Z 

Nia Haerani, Dr. S.T., M.T., Kerinci Volcano Observatory - 1 month ago

Ash emission observed at 0030 UTC (0730 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 to southeast..

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3rd of January 2020, 1 month ago

2020-01-03 08:03:00 UTC Orange

Dukono - 20200103/0803Z 

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

Eruption with volcanic ash cloud at 0759 UTC (1659 local). Best estimate of ash-cloud top is around 5533 FT (1729 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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2nd of January 2020, 1 month ago

2020-01-02 23:57:00 UTC Orange

Dukono - 20200102/2357Z 

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

Eruption with volcanic ash cloud at 2347 UTC (0847 local). Best estimate of ash-cloud top is around 5853 FT (1829 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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1st of January 2020, 1 month ago

2020-01-01 03:52:00 UTC Orange

Anak Krakatau - 20200101/0352Z 

Jumono, Anak Krakatau Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0345 UTC (1045 local). Best estimate of ash-cloud top is around 2742 FT (857 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick gray volcanic ash from the top of the crater. Ash cloud is moving to southeast. .

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31st of December 2019, 1 month ago

2019-12-31 06:51:00 UTC Orange

Anak Krakatau - 20191231/0651Z 

Jumono, Anak Krakatau Volcano Observatory - 1 month ago

Recorded eruption at 06:31 UTC (13:31 local ) Best estimate of ash-cloud top is around 3702 FT (1157 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. White grey ash cloud is moving to east.

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2019-12-31 00:05:00 UTC Orange

Anak Krakatau - 20191231/0005Z 

Deny Mardiono, A.Md., Anak Krakatau Volcano Observatory - 1 month ago

Eruption with ash clouds at 23:51 UTC (06:51 local time). Best estimate of ash-cloud top is around 3702 FT (1157 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick gray-black volcanic ash from the top of the crater. Ash-cloud moving to south..

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30th of December 2019, 1 month ago

2019-12-30 09:23:00 UTC Orange

Dukono - 20191230/0923Z 

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

Eruption with volcanic ash cloud at 0913 UTC (1813 local). Best estimate of ash-cloud top is around 5853 FT (1829 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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2019-12-30 06:46:00 UTC Orange

Anak Krakatau - 20191230/0646Z 

Deny Mardiono, A.Md., Anak Krakatau Volcano Observatory - 1 month ago

Eruption with ash clouds at 06:35 UTC (13:35 local time). Best estimate of ash-cloud top is around 3702 FT (1157 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..

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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.