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.
USGS10th of June 2019, 8 months ago
Continuous emission 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. Cloud is moving to East-Southeast .
View9th of June 2019, 8 months ago
Eruption with volcanic ash cloud to 16:28 local time. Eruption accompany with pyroclastic flow that flows to 3,5 km to south east and 3 km to south Best estimate of ash-cloud top is around 30272 FT (9460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. direction to south and east.
View27th of May 2019, 8 months ago
Eruption with ash clouds at 18:18 UTC (01:18 local time). The eruption lasted for 152 seconds. Ash-cloud not visible. Ash cloud is moving to southeast-northeast..
ViewEruption with ash clouds at 16:23 UTC (23:23 local time). The eruption lasted for 756 seconds. Ash-cloud not visible. Ash cloud is moving to southeast-northeast..
View26th of May 2019, 9 months ago
Eruption with ash clouds at 23:29 UTC (06:29 local time). The eruption lasted for 384 seconds. Best estimate of ash-cloud top is around 15872 FT (4960 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to South..
View24th of May 2019, 9 months ago
Eruption with ash clouds at 19:53 UTC (02:53 local time). The eruption lasted for 426 seconds. Ash-cloud not visible. The ashes are not observed because of closed fog.
View12th of May 2019, 9 months ago
Eruption with ash clouds at 05:33 UTC (12:33 local time). The eruption lasted for 28 seconds. Ash-cloud not visible. The ashes are not observed because of closed fog.
View11th of May 2019, 9 months ago
Eruption with ash clouds at 13:39 UTC (20:39 local time). The eruption lasted for 1980 seconds. Ash-cloud not visible. The ashes are not observed because of closed fog.
View7th of May 2019, 9 months ago
Eruption with ash clouds at 23:41 UTC (06:41 local time). The eruption lasted for 2569 seconds. 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 is moving to Southwest..
View15th of June 2018, 1 year ago
Eruption with ash clouds at 00:00 UTC ( 07:00 local time). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 31258 FT (9472 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.
View22nd of June 2018, 1 year ago
Eruption with volcanic ash clouds at 02:06 UTC (09:06 local time). The eruption is still continuing Best estimate of ash-cloud top is around 36538 FT (11072 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash clouds is moving to south-west.
View20th of May 2018, 1 year ago
Eruption with ash clouds at 14:22 UTC (21:22 local time). The eruption lasted for 776 seconds. Best estimate of ash-cloud top is around 52378 FT (15872 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to west-southwest.
View19th of May 2018, 1 year ago
Eruption with ash clouds at 02:00 UTC ( 09:00 local time). The eruption lasted for 308 seconds Best estimate of ash-cloud top is around 33370 FT (10112 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to North-west.
View18th of May 2018, 1 year ago
Eruption with ash clouds at 10:32 UTC ( 17:32 local time). The eruption lasted for 191 seconds. Best estimate of ash-cloud top is around 36538 FT (11072 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud is moving to North-west.
View19th of April 2018, 1 year ago
Eruption with ash clouds started at 09:04 UTC ( 16:04 local time). The eruption still continuing Best estimate of ash-cloud top is around 57658 FT (17472 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.
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.
