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.
USGS22nd of June 2020, 2 weeks ago
Eruption with volcanic ash cloud at 0326 UTC (1026 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 southeast..
View21st of June 2020, 3 weeks ago
Ash-cloud is not visible after eruptions on 0213 and 0227 UTC. Ash-cloud not visible. Ash-cloud is not visible..
ViewEruption with volcanic ash cloud at 0213 UTC (0913 local) and 0227 UTC (0927 local) Best estimate of ash-cloud top is around 28698 FT (8968 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
View19th of June 2020, 3 weeks ago
Eruption with volcanic ash cloud at 2346 UTC (0646 local) Best estimate of ash-cloud top is around 13363 FT (4176 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south.
ViewEruption with volcanic ash cloud at 0129 UTC (1029 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 west.
View18th of June 2020, 3 weeks ago
Eruption with volcanic ash cloud at 2234 UTC (0534 local). Best estimate of ash-cloud top is around 13363 FT (4176 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west.
View17th of June 2020, 3 weeks ago
Eruption with volcanic ash cloud at 0110 UTC (1010 local). Best estimate of ash-cloud top is around 4573 FT (1429 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
View16th of June 2020, 3 weeks ago
Eruption with volcanic ash cloud at 2250 UTC (0750 local). Best estimate of ash-cloud top is around 6493 FT (2029 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west, northwest.
View15th of June 2020, 3 weeks ago
Eruption with volcanic ash cloud at 0237 UTC (0937 local). Best estimate of ash-cloud top is around 13363 FT (4176 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west.
View12th of June 2020, 1 month ago
Eruption with volcanic ash cloud at 2244 UTC (0544 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 southwest.
View11th of June 2020, 1 month ago
Eruption with volcanic ash cloud at 2330 UTC (0630 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.
ViewEruption with volcanic ash cloud at 0813 UTC (1713 local). Best estimate of ash-cloud top is around 5533 FT (1729 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest.
View10th of June 2020, 1 month ago
Eruption with volcanic ash cloud at 1116 UTC (0616 local). Best estimate of ash-cloud top is around 12403 FT (3876 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to nort.
ViewEruption with volcanic ash cloud at 2300 UTC (0800 local). Best estimate of ash-cloud top is around 5853 FT (1829 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east.
View9th of June 2020, 1 month 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.
