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
 

Today

2020-09-26 01:11:00 UTC Orange

Semeru - 20200926/0111Z 

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

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.

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25th of September 2020, 1 day ago

2020-09-25 22:54:00 UTC Orange

Ibu - 20200925/2254Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 hours 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..

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24th of September 2020, 2 days ago

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

Dukono - 20200924/2329Z 

Pretina Sitinjak, S.T., Dukono Volcano Observatory - 1 day 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, 4 days ago

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

Dukono - 20200922/0242Z 

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

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20th of September 2020, 6 days ago

2020-09-20 22:33:00 UTC Orange

Ibu - 20200920/2233Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 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.

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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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17th of September 2020, 1 week ago

2020-09-17 23:12:00 UTC Orange

Semeru - 20200917/2312Z 

Liswanto, A.P., Semeru Volcano Observatory - 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.

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16th of September 2020, 1 week ago

2020-09-16 22:44:00 UTC Orange

Semeru - 20200916/2244Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 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.

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14th of September 2020, 1 week ago

2020-09-14 22:30:00 UTC Orange

Semeru - 20200914/2230Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 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. .

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2020-09-14 02:44:00 UTC Orange

Semeru - 20200914/0244Z 

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

Eruption 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..

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7th of September 2020, 2 weeks ago

2020-09-07 22:39:00 UTC Orange

Semeru - 20200907/2239Z 

Yadi Yuliandi, A.Md., Semeru Volcano Observatory - 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.

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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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4th of September 2020, 3 weeks ago

2020-09-04 22:34:00 UTC Orange

Sinabung - 20200904/2234Z 

Moh Nurul Asrori, A.Md., Sinabung Volcano Observatory - 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.

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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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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.