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
 

13th of April 2017, 5 years ago

2017-04-13 11:25:00 UTC Orange

Sinabung - 20170413/1125Z 

Deri Al Hidayat, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 11:14 UTC (18:14 local time). The eruption lasted for 240 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 south-Southwest..

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2017-04-13 00:26:00 UTC Orange

Sinabung - 20170413/0026Z 

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

Eruption with ash clouds at 00:17 UTC ( 07:17 local time). The eruption lasted for 173 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 moving to east.

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12th of April 2017, 5 years ago

2017-04-12 23:10:00 UTC Orange

Ibu - 20170412/2310Z 

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

Eruption with volcanic ash cloud at 2250 UTC (0750 local). Best estimate of ash-cloud top is around 19272 FT (5840 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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2017-04-12 22:54:00 UTC Orange

Dukono - 20170412/2254Z 

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

Eruption with volcanic ash cloud at 2141 UTC (0641 local). Best estimate of ash-cloud top is around 23539 FT (7133 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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2017-04-12 17:08:00 UTC Orange

Sinabung - 20170412/1708Z 

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

Eruption with ash clouds at 16:57 UTC (23:57 local time). The eruption lasted for 224 seconds Best estimate of ash-cloud top is around 38650 FT (11712 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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2017-04-12 14:24:00 UTC Orange

Sinabung - 20170412/1424Z 

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

Eruption with ash clouds at 14:08 UTC ( 21:08 local time). The eruption lasted for 255 seconds. Best estimate of ash-cloud top is around 62515 FT (18944 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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2017-04-12 12:51:00 UTC Yellow

Gamalama - 20170412/1251Z 

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

Sudden increase of Deep Volcanic earthquake since 0927 UTC (1827 local). Visual observation does not show any sign of eruption. 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. No eruption observed..

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2017-04-12 08:06:00 UTC Orange

Dukono - 20170412/0806Z 

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

Eruption with volcanic ash cloud at 0731 UTC (1631 local). Best estimate of ash-cloud top is around 22483 FT (6813 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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11th of April 2017, 5 years ago

2017-04-11 23:57:00 UTC Orange

Ibu - 20170411/2357Z 

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

Eruption with volcanic ash cloud at 2322 UTC (0822 local). Best estimate of ash-cloud top is around 18216 FT (5520 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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2017-04-11 22:41:00 UTC Orange

Dukono - 20170411/2241Z 

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

Eruption with volcanic ash cloud at 2234 UTC (0734 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. Ash cloud moving to west..

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2017-04-11 09:37:00 UTC Orange

Dukono - 20170411/0937Z 

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

Eruption with volcanic ash cloud at 0922 UTC (1822 local). Best estimate of ash-cloud top is around 19315 FT (5853 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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2017-04-11 04:29:00 UTC Red

Sinabung - 20170411/0429Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 04:20 UTC (11:20 local time). The eruption lasted for 356 seconds Best estimate of ash-cloud top is around 59770 FT (18112 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to southeast.

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2017-04-11 01:45:00 UTC Orange

Ibu - 20170411/0145Z 

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

Eruption produce volcanic ash cloud at 0106 UTC (1006 local). Best estimate of ash-cloud top is around 16104 FT (4880 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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10th of April 2017, 5 years ago

2017-04-10 23:49:00 UTC Orange

Sinabung - 20170410/2349Z 

Armen Putra, Sinabung Volcano Observatory - 5 years ago

Eruption with ash clouds at 23:38 UTC ( 06:38 local time). The eruption lasted for 90 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 east -southeast.

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2017-04-10 22:11:00 UTC Orange

Dukono - 20170410/2211Z 

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

Eruption with volcanic ash cloud at 2204 UTC (0704 local). 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. Dark grey 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.