VONA
What is VONA?

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.

USGS
 

9th of November 2020, 1 year ago

2020-11-09 02:09:00 UTC Orange

Dukono - 20201109/0209Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0125 UTC (1025 local). Best estimate of ash-cloud top is around 15091 FT (4573 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
 

5th of November 2020, 1 year ago

2020-11-05 00:54:00 UTC Orange

Dukono - 20201105/0054Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0033 UTC (0933 local). Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southeast..

View
 

29th of October 2020, 1 year ago

2020-10-29 03:39:00 UTC Orange

Dukono - 20201029/0339Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0250 UTC (1150 local). Best estimate of ash-cloud top is around 19315 FT (5853 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..

View
 

28th of October 2020, 1 year ago

2020-10-28 01:08:00 UTC Orange

Dukono - 20201028/0108Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2256 UTC (0756 local). Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south, southwest.

View
 

26th of October 2020, 1 year ago

2020-10-26 04:05:00 UTC Orange

Dukono - 20201026/0405Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2230 UTC (0730 local). Best estimate of ash-cloud top is around 15091 FT (4573 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to North..

View
 

24th of October 2020, 1 year ago

2020-10-24 00:28:00 UTC Orange

Dukono - 20201024/0028Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2147 UTC (0647 local). Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
 

22nd of October 2020, 1 year ago

2020-10-22 03:05:00 UTC Orange

Dukono - 20201022/0305Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0106 UTC (1006 local). Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
 

16th of October 2020, 1 year ago

2020-10-16 02:38:00 UTC Orange

Dukono - 20201016/0238Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2349 UTC (0849 local). Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
 

5th of October 2020, 1 year ago

2020-10-05 22:54:00 UTC Orange

Dukono - 20201005/2254Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2235 UTC (0735 local). Best estimate of ash-cloud top is around 17203 FT (5213 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.

View
 

4th of October 2020, 1 year ago

2020-10-04 01:15:00 UTC Orange

Dukono - 20201004/0115Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0024 UTC (0924 local). Best estimate of ash-cloud top is around 18259 FT (5533 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
 

30th of September 2020, 1 year ago

2020-09-30 02:16:00 UTC Orange

Dukono - 20200930/0216Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0049 UTC (0949 local). Best estimate of ash-cloud top is around 17203 FT (5213 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
 

24th of September 2020, 1 year ago

2020-09-24 23:29:00 UTC Orange

Dukono - 20200924/2329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2304 UTC (0804 local). Best estimate of ash-cloud top is around 21427 FT (6493 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest.

View
 

22nd of September 2020, 1 year ago

2020-09-22 02:42:00 UTC Orange

Dukono - 20200922/0242Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2311 UTC (0811 local). Best estimate of ash-cloud top is around 17203 FT (5213 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.

View
 

18th of September 2020, 1 year ago

2020-09-18 00:06:00 UTC Orange

Dukono - 20200918/0006Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2339 UTC (0839 local). Best estimate of ash-cloud top is around 19315 FT (5853 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east.

View
 

6th of September 2020, 1 year ago

2020-09-06 03:29:00 UTC Orange

Dukono - 20200906/0329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0234 UTC (1134 local). Best estimate of ash-cloud top is around 20371 FT (6173 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.

View
VONA Color Code

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.