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
 

6th of February 2017, 5 years ago

2017-02-06 01:30:00 UTC Orange

Sinabung - 20170206/0130Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0015 UTC (0715 local). Eruption and ash emission is continuing. 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-cloud moving to east..

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2017-02-06 01:28:00 UTC Orange

Sinabung - 20170206/0128Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 2311 UTC (0611 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 east..

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5th of February 2017, 5 years ago

2017-02-05 13:16:00 UTC Orange

Sinabung - 20170205/1316Z 

Estu Kriswati, Dr. S.T., M.Sc., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash clouds at 13:10 UTC (20:10 local time). Best estimate of ash-cloud top is around 78355 FT (23744 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to southeast.

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2017-02-05 06:40:00 UTC Orange

Sinabung - 20170205/0640Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 06:33 UTC (13:33 local time). The eruption lasted for 150 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 cloud is moving to East.

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2017-02-05 02:34:00 UTC Orange

Sinabung - 20170205/0234Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 02:26 UTC (09:26 local time). The eruption lasted for 184 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 cloud is moving to east.

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2017-02-05 02:29:00 UTC Orange

Sinabung - 20170205/0229Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 02:20 UTC (09:20 local time). The eruption lasted for 201 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-cloud moving to east..

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2017-02-05 01:20:00 UTC Orange

Sinabung - 20170205/0120Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 01:09 UTC (08:09 local time). The eruption lasted for 255 seconds. Best estimate of ash-cloud top is around 50266 FT (15232 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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4th of February 2017, 5 years ago

2017-02-04 23:27:00 UTC Orange

Sinabung - 20170204/2327Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 23:18 UTC (06:18 local time). The eruption lasted for 281 seconds. Best estimate of ash-cloud top is around 44986 FT (13632 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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2017-02-04 23:25:00 UTC Orange

Sinabung - 20170204/2325Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 23:14 UTC (06:14 local time). The eruption lasted for 134 seconds. Best estimate of ash-cloud top is around 34426 FT (10432 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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2017-02-04 15:45:00 UTC Orange

Sinabung - 20170204/1545Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 15:40 UTC (22:40 local time). The eruption lasted for 63 seconds Best estimate of ash-cloud top is around 31258 FT (9472 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to East - Southeast .

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2017-02-04 11:45:00 UTC Orange

Sinabung - 20170204/1145Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 1140 UTC (1840 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 east-southeast..

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2017-02-04 10:04:00 UTC Orange

Sinabung - 20170204/1004Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0959 UTC (1659 local). Eruption and ash emission is continuing. 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-cloud moving to east-southeast..

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2017-02-04 08:59:00 UTC Orange

Sinabung - 20170204/0859Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 08:53 UTC (15:53 local time). The eruption lasted for 183 seconds Best estimate of ash-cloud top is around 44986 FT (13632 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to East - Southeast .

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2017-02-04 07:38:00 UTC Orange

Sinabung - 20170204/0738Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 07:28 UTC (14:28 local time). The eruption lasted for 304 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 cloud is moving to East - Southeast .

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2017-02-04 07:07:00 UTC Red

Sinabung - 20170204/0707Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 06:56 UTC (13:56 local time). The eruption lasted for 369 seconds Best estimate of ash-cloud top is around 78778 FT (23872 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to East - 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.