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.
USGSToday
Eruption with volcanic ash cloud at 0349 UTC (1249 local). Best estimate of ash-cloud top is around 4253 FT (1329 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..
View25th of January 2021, 1 day ago
Eruption with volcanic ash cloud at 2323 UTC (0823 local). Best estimate of ash-cloud top is around 4893 FT (1529 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..
View24th of January 2021, 2 days ago
Eruption with volcanic ash cloud 1058 UTC ( 1758 Local Time ), Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12262 FT (3832 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash moving to east.
View23rd of January 2021, 3 days ago
On 23 januari 2021, eruption with volcanic ash cloud 09:20 UTC ( 16:20 Local Time ), Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12582 FT (3932 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving to South-Southwest.
ViewOn 23 januari 2021, eruption with volcanic ash cloud 23:48 UTC ( 06:48 Local Time ), Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12262 FT (3832 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash moving to West Southwest.
View22nd of January 2021, 4 days ago
Eruption with volcanic ash cloud at 1320 UTC (2020 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12262 FT (3832 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..
ViewEruption with volcanic ash cloud at 0013 UTC (0713 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12262 FT (3832 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east. .
View21st of January 2021, 5 days ago
Eruption with volcanic ash cloud at 2256 UTC (0526 local) Best estimate of ash-cloud top is around 12723 FT (3976 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to North.
ViewOn 21 Januari 2021, Eruption with volcanic ash 13:29 UTC ( 20:29 Local Time ) Best estimate of ash-cloud top is around 11942 FT (3732 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to east..
ViewEruption with volcanic ash cloud at 0038 UTC (0738 local) Best estimate of ash-cloud top is around 11942 FT (3732 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash-cloud moving to east. .
View20th of January 2021, 6 days ago
Eruption with ash clouds at 23:35 UTC (06:35 local time). The eruption lasted for 94 seconds Best estimate of ash-cloud top is around 9472 FT (2960 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.
ViewEruption with volcanic ash cloud at 2218 UTC (0518 local) Best estimate of ash-cloud top is around 11942 FT (3732 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash-cloud moving to east. .
ViewEruption with volcanic ash cloud at 2150 UTC (0450 local) Best estimate of ash-cloud top is around 13043 FT (4076 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash-cloud moving to north.
View16th of January 2021, 1 week ago
Eruption with volcanic ash cloud at 1024 UTC (1724 local) Best estimate of ash-cloud top is around 18163 FT (5676 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash-cloud moving to northeast..
View12th of January 2021, 2 weeks ago
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.
