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.
USGSToday
Eruption with volcanic ash cloud at 0617 UTC (1517 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to east.
View2nd of December 2020, 2 days ago
Eruption with volcanic ash cloud at 00:55 UTC (0755 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 east-southeast..
View30th of November 2020, 4 days ago
Eruption with volcanic ash cloud at 1945 UTC (01:45 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 18163 FT (5676 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. : Ash-cloud moving to east.
ViewLava flow at 1823 UTC (01;23 local) Best estimate of ash-cloud top is around 14963 FT (4676 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east.
ViewEruption with volcanic ash cloud at 0434 UTC (1134 local) Ash-cloud not visible. volcano cloudy .
View29th of November 2020, 5 days ago
Eruption with volcanic ash cloud at 11:02 UTC (18:02 local). Eruption and ash emission Best estimate of ash-cloud top is around 9152 FT (2860 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east.
ViewIli Lewotolok - 20201129/0200Z
Eruption with volcanic ash cloud at 0145 UTC (0945 local). Eruption and ash emission is still ongoing. Best estimate of ash-cloud top is around 17354 FT (5423 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving in two directions. The lower level plume is moving west and the upper level plume is moving east..
View27th of November 2020, 1 week ago
Eruption with volcanic ash cloud at 2336 UTC (0836 local). Best estimate of ash-cloud top is around 5853 FT (1829 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..
ViewEruption with volcanic ash cloud at 0918 UTC (1818 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to west.
View26th of November 2020, 1 week ago
Ili Lewotolok - 20201126/2227Z
Eruption with volcanic ash cloud at 2157 UTC (0557 local). Eruption and ash emission is still continuing Best estimate of ash-cloud top is around 6154 FT (1923 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
View25th of November 2020, 1 week 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..
ViewEruption with volcanic ash cloud at 2222 UTC (0722 local). Best estimate of ash-cloud top is around 5213 FT (1629 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..
View22nd of November 2020, 1 week ago
Eruption with volcanic ash cloud at 2146 UTC (0646 local). Best estimate of ash-cloud top is around 6493 FT (2029 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest.
View21st of November 2020, 1 week ago
Eruption with volcanic ash cloud at 1437 UTC (2137 local). Ash-cloud not visible. volcano cloudy.
View19th of November 2020, 2 weeks ago
Volcano 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.
