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.
USGS25th of November 2020, 3 days ago
Eruption with volcanic ash cloud at 1034 UTC (1734 local). 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 moving to south - west..
View21st of November 2020, 1 week ago
Eruption with volcanic ash cloud at 1437 UTC (2137 local). Ash-cloud not visible. volcano cloudy.
View18th of November 2020, 1 week ago
Eruption with volcanic ash cloud at 0644 UTC (1344 local). Best estimate of ash-cloud top is around 11072 FT (3460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south-west..
View10th of November 2020, 2 weeks ago
Eruption with volcanic ash cloud and pyroclastic flow at 0950 UTC (1650 local) Best estimate of ash-cloud top is around 14272 FT (4460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east southeast and pyroclastic flow to southeast as far as 2500 meters.
View4th of November 2020, 3 weeks ago
Eruption with volcanic ash cloud at 1320 UTC (2020 local). Eruption and ash emission 117 second Ash-cloud not visible. visibility is unavailable.
View2nd of November 2020, 3 weeks ago
Eruption with volcanic ash cloud at 16:58 UTC (23:58 local). Eruption and ash emission Best estimate of ash-cloud top is around 12672 FT (3960 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east.
View4th of September 2020, 2 months ago
Eruption with volcanic ash cloud at 22:13 UTC (05:13 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 10432 FT (3260 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north-northeast.
View31st of August 2020, 2 months ago
Eruption with volcanic ash cloud at 02:28 UTC (09:28 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 11072 FT (3460 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.
View25th of August 2020, 3 months ago
Eruption with volcanic ash cloud at 06:22 UTC (13:22 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 10432 FT (3260 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west-nortthwest.
ViewEruption with volcanic ash cloud at 03:50 UTC (10:50 local). Eruption and ash emission is continuing. Ash-cloud not visible. Ash-cloud moving to west-nortthwest.
View23rd of August 2020, 3 months ago
Eruption with volcanic ash cloud at 00:41 UTC (07:41 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12672 FT (3960 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 August 2020, 3 months ago
Eruption with volcanic ash cloud at 22:17 UTC (05:17 local). Eruption and ash emission is continuing. Ash-cloud not visible. Ash-cloud moving to east - southeast..
View19th of August 2020, 3 months ago
Eruption with volcanic ash cloud at 11:23 UTC (18:23 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 20672 FT (6460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east-southeast.
View17th of August 2020, 3 months ago
Eruption with volcanic ash cloud at 10:24 UTC (17:24 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12672 FT (3960 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south-east.
ViewEruption with volcanic ash cloud at 10:24 UTC (17:24 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12672 FT (3960 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south-east.
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.
