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
 

26th of August 2022, 1 month ago

2022-08-26 23:17:00 UTC Orange

Semeru - 20220826/2317Z 

Liswanto, A.P., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2306 UTC (0606 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 west..

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2022-08-26 00:37:00 UTC Orange

Semeru - 20220826/0037Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0035 UTC (0735 local). Best estimate of ash-cloud top is around 13683 FT (4276 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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25th of August 2022, 1 month ago

2022-08-25 04:32:00 UTC Orange

Ibu - 20220825/0432Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0405 UTC (1305 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. Ash-cloud moving to west..

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23rd of August 2022, 1 month ago

2022-08-23 00:07:00 UTC Orange

Ibu - 20220823/0007Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2351 UTC (0851 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. Ash-cloud moving to west..

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22nd of August 2022, 1 month ago

2022-08-22 00:19:00 UTC Orange

Semeru - 20220822/0019Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0017 UTC (0718 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 west.

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21st of August 2022, 1 month ago

2022-08-21 22:46:00 UTC Orange

Semeru - 20220821/2246Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2244 UTC (0544 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 southwest..

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2022-08-21 10:16:00 UTC Orange

Ibu - 20220821/1016Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0958 UTC (1858 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. Ash-cloud moving to west..

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20th of August 2022, 1 month ago

2022-08-20 00:32:00 UTC Orange

Ibu - 20220820/0032Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0012 UTC (0912 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. Ash-cloud moving to west..

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16th of August 2022, 1 month ago

2022-08-16 06:20:00 UTC Orange

Ibu - 20220816/0620Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0554 UTC (1454 local). Best estimate of ash-cloud top is around 9040 FT (2825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..

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15th of August 2022, 1 month ago

2022-08-15 23:37:00 UTC Orange

Semeru - 20220815/2337Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2335 UTC (0635 local) Best estimate of ash-cloud top is around 13683 FT (4276 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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2022-08-15 22:32:00 UTC Orange

Semeru - 20220815/2232Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2231 UTC (0531 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.

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14th of August 2022, 1 month ago

2022-08-14 23:15:00 UTC Orange

Semeru - 20220814/2315Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2312 UTC (0612 local). Best estimate of ash-cloud top is around 13683 FT (4276 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 2022, 1 month ago

2022-08-13 23:02:00 UTC Orange

Semeru - 20220813/2302Z 

Liswanto, A.P., Semeru Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2256 UTC (0556 local) Best estimate of ash-cloud top is around 13683 FT (4276 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south.

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11th of August 2022, 1 month ago

2022-08-11 23:07:00 UTC Orange

Ibu - 20220811/2307Z 

Ridwan Djalil, Ibu Volcano Observatory - 1 month ago

Gambaran umum aktivitas gunungapi. Contoh : Eruption with volcanic ash cloud at 2144 UTC (0644 local). Best estimate of ash-cloud top is around 7440 FT (2325 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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2022-08-11 22:32:00 UTC Orange

Ibu - 20220811/2232Z 

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

Eruption with volcanic ash cloud at 2144 UTC ( 0644 local) Best estimate of ash-cloud top is around 7440 FT (2325 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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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.