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
 

24th of September 2020, 1 day ago

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

Dukono - 20200924/2329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 3 hours 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.

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22nd of September 2020, 3 days ago

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

Dukono - 20200922/0242Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 3 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.

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18th of September 2020, 1 week ago

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

Dukono - 20200918/0006Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 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.

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6th of September 2020, 2 weeks ago

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

Dukono - 20200906/0329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 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.

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2020-09-06 01:24:00 UTC Orange

Dukono - 20200906/0124Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 2 weeks ago

Eruption 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.

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31st of August 2020, 3 weeks ago

2020-08-31 03:26:00 UTC Orange

Dukono - 20200831/0326Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 0245 UTC (1145 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.

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24th of August 2020, 1 month ago

2020-08-24 00:02:00 UTC Orange

Dukono - 20200824/0002Z 

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

Eruption with volcanic ash cloud at 2322 UTC (0822 local). Best estimate of ash-cloud top is around 6813 FT (2129 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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20th of August 2020, 1 month ago

2020-08-20 23:36:00 UTC Orange

Dukono - 20200820/2336Z 

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

Eruption with volcanic ash cloud at 2330 UTC (0830 local). Best estimate of ash-cloud top is around 6813 FT (2129 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to southwest.

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17th of August 2020, 1 month ago

2020-08-17 00:15:00 UTC Orange

Dukono - 20200817/0015Z 

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

Eruption with volcanic ash cloud at 2346 UTC (0846 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 north.

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14th of August 2020, 1 month ago

2020-08-14 09:18:00 UTC Orange

Dukono - 20200814/0918Z 

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

Eruption with volcanic ash cloud at 0918 UTC (1818 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.

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13th of August 2020, 1 month ago

2020-08-13 08:27:00 UTC Orange

Dukono - 20200813/0827Z 

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

Eruption with volcanic ash cloud at 0749 UTC (1649 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.

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9th of August 2020, 1 month ago

2020-08-09 03:06:00 UTC Orange

Dukono - 20200809/0306Z 

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

Eruption with volcanic ash cloud at 0134 UTC (1034 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..

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7th of August 2020, 1 month ago

2020-08-07 00:27:00 UTC Orange

Dukono - 20200807/0027Z 

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

Eruption with volcanic ash cloud at 2317 UTC ( 0817 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..

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6th of August 2020, 1 month ago

2020-08-06 01:19:00 UTC Orange

Dukono - 20200806/0119Z 

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

Eruption with volcanic ash cloud at 0114 UTC (1014 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 northeast.

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4th of August 2020, 1 month ago

2020-08-04 00:39:00 UTC Orange

Dukono - 20200804/0039Z 

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

Eruption with volcanic ash cloud at 2302 UTC (0802 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..

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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.