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.
USGS14th of June 2022, 1 year ago
Eruption with volcanic ash cloud at 2254 UTC (0754 local). Best estimate of ash-cloud top is around 10640 FT (3325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest..
View13th of June 2022, 1 year ago
Eruption with volcanic ash cloud at 1113 UTC (2013 local). Best estimate of ash-cloud top is around 9040 FT (2825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..
View6th of June 2022, 1 year ago
Eruption with volcanic ash cloud at 0216 UTC (1116 local). Best estimate of ash-cloud top is around 17040 FT (5325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast..
View28th of May 2022, 1 year ago
Eruption with volcanic ash cloud at 0011 UTC (0911 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest..
View16th of May 2022, 1 year ago
Eruption with volcanic ash cloud at 0746 UTC (1646 local). Best estimate of ash-cloud top is around 12240 FT (3825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..
View14th of May 2022, 1 year ago
Eruption with volcanic ash cloud at 0907 UTC (1807 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast..
ViewEruption with volcanic ash cloud at 0003 UTC (0903 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..
View6th of May 2022, 1 year ago
Eruption with volcanic ash cloud at 1414 UTC (2314 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest..
View5th of May 2022, 1 year ago
Eruption with volcanic ash cloud at 0925 UTC (1825 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..
View4th of May 2022, 1 year ago
Eruption with volcanic ash cloud at 1343 UTC (2243 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest..
View30th of April 2022, 1 year ago
Eruption with volcanic ash cloud at 0101 UTC (1001 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast..
View29th of April 2022, 1 year ago
Eruption with volcanic ash cloud at 0051 UTC (0951 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast..
View28th of April 2022, 1 year ago
Eruption with volcanic ash cloud at 0526 UTC (1426 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest..
ViewEruption with volcanic ash cloud at 2343 UTC (0843 local). Best estimate of ash-cloud top is around 12240 FT (3825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest..
View27th of April 2022, 1 year 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.
