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.
USGS13th of January 2023, 2 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. Ash cloud moving from southwest to west. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
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. Ash cloud moving to north. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
View12th of January 2023, 2 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. Ash cloud moving to northwest. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
View11th of January 2023, 2 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. Ash cloud moving from northeast to east. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be medium..
View10th of January 2023, 2 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. Ash cloud moving from northeast to east. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
View9th of December 2022, 1 month ago
Ash-cloud is not observed. Ash-cloud is not observed. Ash-cloud is not observed..
View6th of December 2022, 1 month 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. Ash cloud moving to southwest. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
View20th of October 2022, 3 months ago
Eruption with Volcanic ash cloud at 1203 UTC (0603 lokal) Best estimate of ash-cloud top is around 14576 FT (4555 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to Northwest.
View19th of October 2022, 3 months ago
Ash cloud at 0115 UTC (0815 local). Ash emission is continuing. Best estimate of ash-cloud top is around 14416 FT (4505 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to Northwest.
View18th of October 2022, 3 months ago
Volcanic ash cloud at 1120 UTC (0620 local) 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- cloud moving to Northwest.
View20th of December 2021, 1 year ago
Gas emission detected at 0010 UTC (0710 local). Best estimate of ash-cloud top is around 14416 FT (4505 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. No ash detected..
View14th of October 2021, 1 year ago
Gas emission at 10.51 UTC (17.30 Lokal) Best estimate of ash-cloud top is around 14576 FT (4555 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Volcanic plume moving to East.
View13th of June 2021, 1 year ago
Gas emission at 1030 UTC (1730 lokal) Best estimate of ash-cloud top is around 14416 FT (4505 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Volcanic Plume moving to west.
View30th of May 2021, 1 year ago
Gas emission at 1114 UTC (0614 lokal). Best estimate of ash-cloud top is around 14416 FT (4505 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Volcanic Plume moving to nort west.
View16th of October 2020, 2 years ago
Eruption with volkanic ash cloud at 1040 UTC ( 0340 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 48629 FT (14736 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash plume moving to north-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.
