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.
USGS15th of August 2020, 1 month ago
On 15 Agustus 2020, observed brown ash emission at 00:31 UTC ( 07:31 Local Time ) Best estimate of ash-cloud top is around 14736 FT (4605 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving Northwest.
View13th of August 2020, 1 month ago
On 13 Agustus 2020, observed brown ash emission at 05:25 UTC ( 12:25 Local Time ) Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-NorthEast.
View12th of August 2020, 1 month ago
On 12 Agustus 2020, observed brown ash emission at 09:02 UTC ( 16:02 Local Time ) Best estimate of ash-cloud top is around 15376 FT (4805 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Southeast-NorthEast.
View9th of August 2020, 1 month ago
On 9 Agustus 2020, observed brown ash emission at 04:40 UTC ( 11:40 Local Time ). Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Northeast.
View7th of August 2020, 1 month ago
On 7 Agustus 2020, observed brown ash emission at 03:24 UTC ( 10:24 Local Time ) Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Southeast-Northeast.
View14th of April 2020, 5 months ago
On 14 April 2020, observed brown ash emission at 03:27 UTC ( 10:27 Local Time ) Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving West-Southwest-East-Northeast..
ViewOn 14 April 2020, observed brown ash emission at 02:47 UTC ( 09:47 Local Time ) Best estimate of ash-cloud top is around 13456 FT (4205 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving Northwest-Northeast.
View13th of April 2020, 5 months ago
On 13 April 2020, observed brown ash emission at 09:36 UTC ( 16:36 Local Time ) Best estimate of ash-cloud top is around 15376 FT (4805 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Southeast.
ViewOn 13 April 2020, observed brown ash emission at 06:03 UTC ( 13:03 Local Time ). Best estimate of ash-cloud top is around 14736 FT (4605 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Northeast.
ViewOn 13 April 2020, observed brown ash emission at 05:54 UTC ( 12:54 Local Time ). Best estimate of ash-cloud top is around 13776 FT (4305 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-Northeast.
View9th of April 2020, 5 months ago
On 10 April 2020, observed brown ash emission at 23:38 UTC ( 06:38 Local Time ). Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving West-Northwest.
View7th of April 2020, 5 months ago
On 7 April 2020, observed brown ash emission at 00:17 UTC ( 07:17 Local Time ) Best estimate of ash-cloud top is around 13456 FT (4205 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving East-NorthEast..
View6th of April 2020, 5 months ago
On 6 April 2020, observed brown ash emission at 01:54 UTC ( 08:54 Local Time ). Best estimate of ash-cloud top is around 13776 FT (4305 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving North-Northwest..
View24th of March 2020, 6 months ago
On 25 Maret 2020, observed brown ash emission at 22:59 UTC ( 05:59 Local Time ) Best estimate of ash-cloud top is around 13776 FT (4305 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving West - Southwest..
View14th of March 2020, 6 months ago
On 14 Maret 2020, observed brown ash emission at 09:33 UTC ( 16:33 Local Time ) Best estimate of ash-cloud top is around 13776 FT (4305 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving West - Northwest..
ViewVolcano 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.
