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 0109 UTC (0809 local). Best estimate of ash-cloud top is around 12403 FT (3876 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to southwest.
View25th of September 2020, 1 day ago
Eruption with volcanic ash cloud at 2054 UTC (0554 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. White to grey ash-cloud moving to south..
View24th of September 2020, 2 days ago
Eruption with volcanic ash cloud at 2304 UTC (0804 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.
View22nd of September 2020, 4 days ago
Eruption with volcanic ash cloud at 2311 UTC (0811 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 west, northwest.
View20th of September 2020, 6 days ago
Eruption with volcanic ash cloud at 2113 UTC (0613 local). Best estimate of ash-cloud top is around 4880 FT (1525 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north.
View18th of September 2020, 1 week ago
Eruption with volcanic ash cloud at 2339 UTC (0839 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.
View17th of September 2020, 1 week ago
Eruption with volcanicash cloud at 2250 UTC (0550 ) local Best estimate of ash-cloud top is around 12403 FT (3876 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to north.
View16th of September 2020, 1 week ago
Eruption with volcanic ash cloud at 2246UTC (0546 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 southeast.
View14th of September 2020, 1 week ago
Eruption with volcanic ash cloud at 2232 UTC (0532 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 northeast. .
ViewEruption with volcanic ash cloud at 0249 UTC (0949local). Best estimate of ash-cloud top is around 13043 FT (4076 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..
View7th of September 2020, 2 weeks ago
Eruption with volcanic ash cloud at 2241 UTC (0541 local) Best estimate of ash-cloud top is around 13043 FT (4076 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south.
View6th of September 2020, 2 weeks ago
Eruption with volcanic ash cloud at 0234 UTC (1134 local). Best estimate of ash-cloud top is around 6173 FT (1929 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.
ViewEruption with volcanic ash cloud at 2329 UTC (0829 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 west.
View4th of September 2020, 3 weeks ago
Eruption with volcanic ash cloud at 22:13 UTC (05:13 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 10432 FT (3260 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north-northeast.
View31st of August 2020, 3 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.
