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
 

21st of December 2016, 5 years ago

2016-12-21 17:11:00 UTC Orange

Sinabung - 20161221/1711Z 

Armen Putra, Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash clouds at 16:44 UTC (23:44 local time). The eruption lasted for 180 second. 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 southeast-East.

View
2016-12-21 09:02:00 UTC Orange

Sinabung - 20161221/0902Z 

Arif Cahyo Purnomo, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash clouds at 08:44 UTC (15:44 local time). The eruption lasted for 308 second. 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 clouds is moving to southwest.

View
2016-12-21 08:59:00 UTC Orange

Sinabung - 20161221/0859Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0944 UTC (1544 local). 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 moving to southwest..

View
2016-12-21 02:11:00 UTC Orange

Sinabung - 20161221/0211Z 

Arif Cahyo Purnomo, A.Md., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash clouds at 01:02 UTC (08:02 local time). The eruption lasted for 224 second. 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 southeast.

View
2016-12-21 02:03:00 UTC Orange

Sinabung - 20161221/0203Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 0102 UTC (0802 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 the southeast.

View
2016-12-21 00:06:00 UTC Orange

Dukono - 20161221/0006Z 

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

Eruption observed at 2308 UTC (0808 local) produced dark-grey ash cloud. 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 east-northeast..

View
 

20th of December 2016, 5 years ago

2016-12-20 17:30:00 UTC Orange

Sinabung - 20161220/1730Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash cloud at 1709 UTC (0009 local time). 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 southeast.

View
2016-12-20 17:19:00 UTC Orange

Sinabung - 20161220/1719Z 

Ardi, Sinabung Volcano Observatory - 5 years ago

Eruption with volcanic ash clouds at 17:09 UTC (00:09 local time). The eruption lasted for 216 second 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 southeast.

View
 

19th of December 2016, 5 years ago

2016-12-19 23:12:00 UTC Orange

Dukono - 20161219/2312Z 

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

Eruption produced dark-grey ash cloud observed at 2253 UTC (0753 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..

View
2016-12-19 10:59:00 UTC Orange

Sinabung - 20161219/1059Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption at 1151 UTC (1751 local time) 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.

View
2016-12-19 01:30:00 UTC Orange

Sinabung - 20161219/0130Z 

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

Eruption with volcanic ash clouds at 01:24 UTC (08:24 local time). The eruption lasted for 193 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 south.

View
2016-12-19 00:35:00 UTC Orange

Sinabung - 20161219/0035Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption at 1440 UTC (2140 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 cannot obeserved.

View
 

18th of December 2016, 5 years ago

2016-12-18 23:51:00 UTC Orange

Dukono - 20161218/2351Z 

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

Eruption with ash cloud observed at 2305 UTC (0805 local). Eruption and ash emission is continuing. 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 south..

View
2016-12-18 01:20:00 UTC Orange

Sinabung - 20161218/0120Z 

Wilfridus F. S. Banggur, S.T., Sinabung Volcano Observatory - 5 years ago

Eruption at 1922 UTC (0222 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 cannot observed caused local weather.

View
2016-12-18 00:48:00 UTC Orange

Dukono - 20161218/0048Z 

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

Eruption produced dark-grey ash cloud observed at 2356 UTC (0856 local). Eruption and ash emission is continuing. 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 southeast..

View
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.