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.
USGS24th of March 2023, 1 day ago
Ili Lewotolok - 20230324/0944Z
Eruption with volcanic ash cloud at 0944 UTC (1744 local). Best estimate of ash-cloud top is around 6794 FT (2123 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 northwest. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
View22nd of March 2023, 3 days ago
Ili Lewotolok - 20230322/1216Z
Eruption with volcanic ash cloud at 1216 UTC (2016 local). Best estimate of ash-cloud top is around 6154 FT (1923 M) above sea level or 1600 FT (500 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west. Volcanic ash is observed to be white to gray. The intensity of volcanic ash is observed to be thick..
ViewIli Lewotolok - 20230322/0823Z
Eruption with volcanic ash cloud at 0823 UTC (1623 local). Best estimate of ash-cloud top is around 6154 FT (1923 M) above sea level or 1600 FT (500 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to west. Volcanic ash is observed to be white to gray. The intensity of volcanic ash is observed to be thick..
View21st of March 2023, 4 days ago
Ili Lewotolok - 20230321/2117Z
Eruption with volcanic ash cloud at 2117 UTC (0517 local). Best estimate of ash-cloud top is around 5834 FT (1823 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 northwest. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick..
ViewIli Lewotolok - 20230321/0856Z
Eruption with volcanic ash cloud at 0856 UTC (1656 local). Best estimate of ash-cloud top is around 5834 FT (1823 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 northwest. Volcanic ash is observed to be white to gray. The intensity of volcanic ash is observed to be thick..
View18th of January 2023, 2 months ago
Ili Lewotolok - 20230118/1833Z
Eruption with volcanic ash cloud at 1833 UTC (0233 local). Best estimate of ash-cloud top is around 5834 FT (1823 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 east. Volcanic ash is observed to be white to gray. The intensity of volcanic ash is observed from medium to thick..
View17th of January 2023, 2 months ago
Ili Lewotolok - 20230117/1352Z
Eruption with volcanic ash cloud at 1352 UTC (2152 local). Best estimate of ash-cloud top is around 6154 FT (1923 M) above sea level or 1600 FT (500 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 white to gray. The intensity of volcanic ash is observed to be thick..
View16th of January 2023, 2 months ago
Ili Lewotolok - 20230116/1255Z
Eruption at 1255 UTC (2055 local). Ash-cloud is not observed. Ash-cloud is not observed..
View13th of January 2023, 2 months ago
Ili Lewotolok - 20230113/2347Z
Eruption with volcanic ash cloud at 2347 UTC (0747 local). Best estimate of ash-cloud top is around 5834 FT (1823 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 east. Volcanic ash is observed to be white to gray. The intensity of volcanic ash is observed from medium to thick..
View13th of October 2022, 5 months ago
Ili Lewotolok - 20221013/2037Z
Eruption with volcanic ash cloud at 1951 UTC (0351 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 8394 FT (2623 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.
View7th of July 2022, 8 months ago
Ili Lewotolok - 20220707/1002Z
Eruption with volcanic ash cloud at 0948 UTC (1748 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 6794 FT (2123 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast..
View2nd of July 2022, 8 months ago
Ili Lewotolok - 20220702/2330Z
Eruption with volcanic ash cloud at 2326 UTC (0726 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 7754 FT (2423 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
ViewIli Lewotolok - 20220702/0753Z
Eruption with volcanic ash cloud at 0717 UTC (1517 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 7434 FT (2323 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
View1st of July 2022, 8 months ago
Ili Lewotolok - 20220701/2200Z
Eruption with volcanic ash cloud at 2146 UTC (0546 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 6794 FT (2123 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
ViewIli Lewotolok - 20220701/0835Z
Eruption with volcanic ash cloud at 0831 UTC (1631 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 8714 FT (2723 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
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.
