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 February 2017, 5 years ago

2017-02-25 03:30:00 UTC Orange

Sinabung - 20170225/0330Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 03:26 UTC (10:26 local time). The eruption lasted for 174 seconds Best estimate of ash-cloud top is around 37594 FT (11392 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to west - northwest .

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2017-02-25 03:06:00 UTC Orange

Sinabung - 20170225/0306Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 02:58 UTC (09:58 local time). The eruption lasted for 106 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 west - northwest .

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24th of February 2017, 5 years ago

2017-02-24 23:37:00 UTC Orange

Sinabung - 20170224/2337Z 

Armen Putra, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 23:05 UTC (06:05 local time). The eruption lasted for 225 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 west-southwest.

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2017-02-24 05:02:00 UTC Orange

Sinabung - 20170224/0502Z 

Armen Putra, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 08:54 UTC (11:54 local time). The eruption lasted for 184 seconds. 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 cloud is moving to west-southwest.

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2017-02-24 05:01:00 UTC Orange

Sinabung - 20170224/0501Z 

Armen Putra, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 08:49 UTC (11:49 local time). The eruption lasted for 146 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 west-southwest.

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2017-02-24 03:08:00 UTC Orange

Sinabung - 20170224/0308Z 

Armen Putra, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 02:58 UTC (09:58 local time). The eruption lasted for 243 seconds. Best estimate of ash-cloud top is around 55546 FT (16832 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to west-southwest.

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23rd of February 2017, 5 years ago

2017-02-23 23:52:00 UTC Orange

Sinabung - 20170223/2352Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 23:42 UTC (06:42 local time). The eruption lasted for 283 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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2017-02-23 23:07:00 UTC Orange

Dukono - 20170223/2307Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud observed at 2300 UTC (0800 local). Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Dark grey ash cloud moving to west..

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22nd of February 2017, 5 years ago

2017-02-22 22:47:00 UTC Orange

Dukono - 20170222/2247Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash at 2237 UTC (0737 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 17203 FT (5213 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-southwest..

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2017-02-22 04:10:00 UTC Orange

Sinabung - 20170222/0410Z 

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

Eruption with volcanic ash cloud at 0402 UTC (1102 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 67795 FT (20544 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west-southwest.

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21st of February 2017, 5 years ago

2017-02-21 23:47:00 UTC Orange

Sinabung - 20170221/2347Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 2342 UTC (0642 local). Eruption and ash emission is continuing. 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 west-southwest..

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2017-02-21 00:46:00 UTC Orange

Sinabung - 20170221/0046Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 00:33 UTC (07:33 local time). The eruption lasted for 340 seconds. Best estimate of ash-cloud top is around 52378 FT (15872 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to south - east .

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20th of February 2017, 5 years ago

2017-02-20 22:33:00 UTC Orange

Dukono - 20170220/2233Z 

Nia Haerani, Dr. S.T., M.T., Dukono Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 2225 UTC (0725 local). Best estimate of ash-cloud top is around 16147 FT (4893 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to southwest..

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2017-02-20 21:25:00 UTC Orange

Sinabung - 20170220/2125Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Hot could avalanches with ash clouds at 21:04 UTC (04:04 local time). It’s lasted for 268 seconds0 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 is not observed .

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2017-02-20 10:35:00 UTC Orange

Sinabung - 20170220/1035Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 10:27 UTC (17:27 local time). The eruption lasted for 211 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 cloud is moving to southwest - 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.