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.
USGS4th of February 2023, 7 months ago
Eruption at 0154 UTC (0854 local). Ash-cloud is not observed. Ash-cloud is not observed..
View28th of December 2020, 2 years ago
Gas emission produced volcanic ash observed at Eruption with at 2250 UTC (0550 local). Best estimate of ash-cloud top is around 29875 FT (9053 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Gas emission with volcanic ash. Ashfall at Ngadirejo area, about 5 km northeast part from the crater..
View19th of October 2016, 6 years ago
Steam emission with sometimes ash material detected at 0110 UTC (0810 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud colored white - dark grey moving toward southwest..
View12th of July 2016, 7 years ago
Eruption with volcanic ash clouds at 23:04 UTC (06:04 local time), and the ash still continue. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud grey white to brown move to south-southeast and still continue..
View24th of May 2016, 7 years ago
Eruption happened in 24/05/2016 06:17 WIB with brown ash, and presure low, cloud height about 900 meters above summit, and move to the east Best estimate of ash-cloud top is around 34099 FT (10333 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. ash cloud move to the east with low presure.
View3rd of April 2016, 7 years ago
Eruption with vulcanic ash above 600m from the summit or 2929m above sea level Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud white greay to brown move to south west and still continue.
ViewEruption with vulcanic ash above 600m from the summit or 2929m above sea level Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud white greay to brown move to south west and still continue.
ViewEruption with vulconic ash above 600M from summit or 2929m above sea level and the ash still contuinue Best estimate of ash-cloud top is around 30931 FT (9373 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud grey white to brown move south west.
View2nd of April 2016, 7 years ago
High steam emissions (with sometimes contains ash material, although not everday) Best estimate of ash-cloud top is around 34099 FT (10333 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. high steam emissions with sometimes contains ash material, although not everday..
ViewSteam emission with sometimes ash material detected at 0110 UTC (0810 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 33043 FT (10013 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud colored white - dark grey moving toward southwest..
View19th of July 2019, 4 years ago
Eruption with volcanic ash cloud at 0937 UTC (1637 local). Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. The height and direction of ash column couldnot observed due to weather obscured. .
View6th of April 2019, 4 years ago
Eruption with volcanic ash cloud at 0018 UTC (0718 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 34099 FT (10333 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast.
View27th of March 2019, 4 years ago
Eruption with volcanic ash cloud at 1040 UTC (1740 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 40435 FT (12253 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north and northeast..
ViewEruption with volcanic ash cloud at 0100 UTC (0800 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 35155 FT (10653 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west, northwest, north and northeast.
View26th of March 2019, 4 years ago
Eruption with volcanic ash cloud at 0945 UTC (1645 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 37267 FT (11293 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast and north.
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.
