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.
USGS5th of February 2023, 2 days ago
Eruption with volcanic ash cloud at 0022 UTC (0722 local). Best estimate of ash-cloud top is around 12816 FT (4005 M) above sea level or 640 FT (200 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
View3rd of February 2023, 4 days ago
Eruption with volcanic ash cloud at 2346 UTC (0646 local). Best estimate of ash-cloud top is around 12816 FT (4005 M) above sea level or 640 FT (200 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
View2nd of February 2023, 5 days ago
13th of January 2023, 3 weeks ago
Eruption with volcanic ash cloud at 2358 UTC (0658 local). Best estimate of ash-cloud top is around 14576 FT (4555 M) above sea level or 2400 FT (750 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
ViewEruption with volcanic ash cloud at 0231 UTC (0931 local). Best estimate of ash-cloud top is around 13456 FT (4205 M) above sea level or 1280 FT (400 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
View12th of January 2023, 3 weeks ago
Eruption with volcanic ash cloud at 1110 UTC (1810 local). Best estimate of ash-cloud top is around 16016 FT (5005 M) above sea level or 3840 FT (1200 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
View11th of January 2023, 3 weeks ago
Eruption with volcanic ash cloud at 2320 UTC (0620 local). Best estimate of ash-cloud top is around 14096 FT (4405 M) above sea level or 1920 FT (600 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
View10th of January 2023, 4 weeks ago
Eruption with volcanic ash cloud at 2246 UTC (0546 local). Best estimate of ash-cloud top is around 15056 FT (4705 M) above sea level or 2880 FT (900 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
View9th of December 2022, 1 month ago
6th of December 2022, 2 months ago
Eruption with volcanic ash cloud at 0122 UTC (0822 local). Best estimate of ash-cloud top is around 14416 FT (4505 M) above sea level or 2240 FT (700 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
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.
