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.
USGS17th of February 2020, 1 week ago
On 17 february 2020, observed brown ash emission at 00:48 UTC ( 07:48 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 west..
View16th of February 2020, 1 week ago
On 16 february 2020, observed brown ash emission at 23:00 UTC ( 06:00 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 southwest..
View1st of February 2020, 3 weeks ago
On 1 february 2020, observed brown ash emission at 10:59 UTC (17:59 Local Time). Best estimate of ash-cloud top is around 13136 FT (4105 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving northeast..
View24th of January 2020, 1 month ago
On 24 january 2020, observed brown ash emission at 01:06 UTC (08:06 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 northwest.
View5th of January 2020, 1 month ago
On 5 January 2020, observed brown ash emission at 00:58 UTC (07:58 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 to East - Southeast..
View4th of January 2020, 1 month ago
Ash emission observed at 0030 UTC (0730 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 to southeast..
View1st of November 2019, 3 months ago
Observed brown ash emission at 22:53 UTC (05:53 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 plume moving to east-southeast.
View31st of October 2019, 3 months ago
Observed brown ash emission at 22:43 UTC (05:43 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 plume moving to east-southeast.
View30th of October 2019, 3 months ago
Observed brown ash emission at 10:21 UTC (17:21 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 plume moving West-Southwest.
ViewObserved brown ash emission at 10:21 UTC (17:21 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 plume moving West-Southwest.
View29th of October 2019, 3 months ago
Observed brownish white ash emission at 23:14 UTC (06:14 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 plume moving to east-southeast-northeast.
View6th of October 2019, 4 months ago
Observed brown ash emission at 05:53 UTC (12:53 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 plume moving to west-southwest.
View31st of July 2019, 6 months ago
Eruption with volcanic ash cloud at 0548 UTC (1248 local). 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-cloud moving to east-northeast..
View6th of June 2019, 8 months ago
Grey ash emission observed at 2304 UTC (0604 Local) 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 moving to east.
View10th of May 2019, 9 months 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.
