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
 

26th of December 2016, 3 years ago

2016-12-26 23:01:00 UTC Orange

Sinabung - 20161226/2301Z 

Armen Putra, Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash clouds at 19:23 UTC (02:23 local time). The eruption lasted for 240 seconds. Best estimate of ash-cloud top is around 47098 FT (14272 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to southwest-west.

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2016-12-26 15:39:00 UTC Orange

Sinabung - 20161226/1539Z 

Armen Putra, Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash clouds at 15:27 UTC (22:27 local time). The eruption lasted for 82 seconds. Best estimate of ash-cloud top is around 36538 FT (11072 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to southwest.

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2016-12-26 13:48:00 UTC Orange

Sinabung - 20161226/1348Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash clouds at 13:31 UTC (20:31 local time). The eruption lasted for 351 seconds. Best estimate of ash-cloud top is around 41818 FT (12672 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to north.

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2016-12-26 12:27:00 UTC Orange

Sinabung - 20161226/1227Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash clouds at 12:15 UTC (19:15 local time). The eruption lasted for 253 seconds. Best estimate of ash-cloud top is around 47098 FT (14272 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to west.

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2016-12-26 06:16:00 UTC Orange

Sinabung - 20161226/0616Z 

Ardi, Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash clouds at 05:42 UTC (12:42 local time). The eruption lasted for 164 seconds Best estimate of ash-cloud top is around 41818 FT (12672 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to northwest.

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2016-12-26 06:15:00 UTC Orange

Sinabung - 20161226/0615Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0542 UTC (1242 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 41818 FT (12672 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest..

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2016-12-26 01:32:00 UTC Orange

Sinabung - 20161226/0132Z 

Ardi, Sinabung Volcano Observatory - 3 years ago

Hot Cloud Avalanches at 01:03 UTC (08:03 local time). The event lasted for 246 seconds 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 clouds is not identified.

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2016-12-26 01:32:00 UTC Orange

Sinabung - 20161226/0132Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 3 years ago

Pyroclastic flow 0103 UTC (803 localtime) and ash emission is 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. Pyroclastic flow moving to the southeast-east sector with distance 2000 meters, and wind moving to the southwest..

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25th of December 2016, 3 years ago

2016-12-25 23:23:00 UTC Orange

Dukono - 20161225/2323Z 

Dr. Devy Kamil Syahbana, S.Si., Dukono Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 2302 UTC (0802 localtime). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving east-northeast..

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2016-12-25 00:44:00 UTC Orange

Dukono - 20161225/0044Z 

Novia Antika Anggraeni, S.Si., Dukono Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 00.05 UTC (09.05 local time). Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud coloured white to dark grey moving to East-Northeast .

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24th of December 2016, 3 years ago

2016-12-24 17:19:00 UTC Orange

Sinabung - 20161224/1719Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 3 years ago

Eruption at 1601 UTC (2301 localtime) 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 couldnot observed.

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2016-12-24 03:34:00 UTC Orange

Sinabung - 20161224/0334Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 3 years ago

Eruption at 1742 UTC (0042 Localtime). 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 couldnot observed..

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23rd of December 2016, 3 years ago

2016-12-23 09:09:00 UTC Orange

Sinabung - 20161223/0909Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0901 UTC (1601 local). Eruption and ash emission is 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 couldnot observed..

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2016-12-23 05:17:00 UTC Orange

Sinabung - 20161223/0517Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 3 years ago

Eruption with volcanic ash clouds at 04:14 UTC (11:14 local time). The eruption lasted for 181 second. 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 column not identified..

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2016-12-23 01:52:00 UTC Orange

Dukono - 20161223/0152Z 

Dr. Nia Haerani, S.T., M.T., Dukono Volcano Observatory - 3 years ago

Eruption produced dark grey ash cloud observed at 0110 UTC (1010 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east-north east..

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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.