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 February 2021, 1 day ago
Eruption with volcanic ash-cloud at 0914 UTC (1814 local) Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to south.
View23rd of February 2021, 2 days ago
Eruption with volcanic ash cloud 2245 UTC (0545 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 13862 FT (4332 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..
ViewEruption with volcanic ash cloud at 2241 UTC (0541 local). Best estimate of ash-cloud top is around 13363 FT (4176 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south.
ViewEruption with volcanic ash cloud 1010 UTC (1710 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12902 FT (4032 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast.
View22nd of February 2021, 3 days ago
Eruption with volcanic ash cloud 2249 UTC (0549 Local Time ). Best estimate of ash-cloud top is around 13222 FT (4132 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast.
ViewEruption with volcanic ash cloud at 0942 UTC (1842 local). Best estimate of ash-cloud top is around 5840 FT (1825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to south.
View19th of February 2021, 6 days ago
Eruption with volcanic ash cloud 1150 UTC (1750 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 14502 FT (4532 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..
View18th of February 2021, 1 week ago
Eruption with volcanic ash cloud 2359 UTC (0659 Local Time ) Best estimate of ash-cloud top is around 13862 FT (4332 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east .
View17th of February 2021, 1 week ago
Eruption with volcanic ash cloud 2235 UTC (0535 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 13862 FT (4332 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 0012 UTC (0712 Local Time ) Best estimate of ash-cloud top is around 13862 FT (4332 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast .
View16th of February 2021, 1 week ago
Eruption with volcanic ash cloud at 2301 UTC (0601 local). Best estimate of ash-cloud top is around 12723 FT (3976 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north.
View15th of February 2021, 1 week ago
Eruption with volcanic ash cloud 2235 UTC (0535 Local Time ) Best estimate of ash-cloud top is around 13862 FT (4332 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast .
View14th of February 2021, 1 week ago
Eruption with volcanic ash cloud 2250 UTC (0550 Local Time ) Best estimate of ash-cloud top is around 13862 FT (4332 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northeast .
View13th of February 2021, 1 week ago
Eruption with volcanic ash cloud 1104 UTC (1804 Local Time ) Best estimate of ash-cloud top is around 13862 FT (4332 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east-northeast.
View12th of February 2021, 1 week 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.
