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
 

20th of February 2020, 6 days ago

2020-02-20 02:20:00 UTC Orange

Ibu - 20200220/0220Z 

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

Eruption with volcanic ash cloud at 0213 UTC (1113 local) Best estimate of ash-cloud top is around 5520 FT (1725 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 southeast.

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17th of February 2020, 1 week ago

2020-02-17 04:53:00 UTC Yellow

Kerinci - 20200217/0453Z 

Irwan Safwan, S.T., Kerinci Volcano Observatory - 1 week ago

On 17 february 2020, observed brown ash emission at 00:48 UTC ( 07:48 Local Time ) Best estimate of ash-cloud top is around 13456 FT (4205 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving west..

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16th of February 2020, 1 week ago

2020-02-16 11:19:00 UTC Orange

Ibu - 20200216/1119Z 

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

Eruption with volcanic ash cloud at 0915 UTC (1815 local). Best estimate of ash-cloud top is around 6800 FT (2125 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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2020-02-16 00:02:00 UTC Yellow

Kerinci - 20200216/0002Z 

Rudra Wibowo, A.Md., Kerinci Volcano Observatory - 1 week ago

On 16 february 2020, observed brown ash emission at 23:00 UTC ( 06:00 Local Time ). Best estimate of ash-cloud top is around 13456 FT (4205 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving southwest..

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13th of February 2020, 1 week ago

2020-02-13 12:01:00 UTC Orange

Dukono - 20200213/1201Z 

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

Eruption with volcanic ash cloud at 0946 UTC ( 1846 local). Best estimate of ash-cloud top is around 4893 FT (1529 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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12th of February 2020, 2 weeks ago

2020-02-12 22:43:00 UTC Orange

Merapi - 20200212/2243Z 

Alzwar Nurmanaji, A.Md, Merapi Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 2216 UTC (0516 local). The eruption lasted for 105 seconds Best estimate of ash-cloud top is around 15898 FT (4968 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest. .

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11th of February 2020, 2 weeks ago

2020-02-11 03:06:00 UTC Orange

Anak Krakatau - 20200211/0306Z 

Jumono, Anak Krakatau Volcano Observatory - 2 weeks ago

Eruption with ash clouds at 02:45 UTC (09:45 local time). The eruption lasted for 75 seconds. Ash-cloud not visible. Anak Krakatau volcano is not clear. .

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10th of February 2020, 2 weeks ago

2020-02-10 11:43:00 UTC Orange

Anak Krakatau - 20200210/1143Z 

Bagus Puguh Wibowo, A.Md., Anak Krakatau Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 1137 UTC (1837 local) Best estimate of ash-cloud top is around 3702 FT (1157 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to East. Thick black volcanic ash from the top of the crater. .

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8th of February 2020, 2 weeks ago

2020-02-08 11:11:00 UTC Orange

Anak Krakatau - 20200208/1111Z 

Bagus Puguh Wibowo, A.Md., Anak Krakatau Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 11.10 UTC (18:10 local) Ash-cloud not visible. Ash cloud is moving to North-West. Anak Krakatau .

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2020-02-08 11:08:00 UTC Orange

Anak Krakatau - 20200208/1108Z 

Bagus Puguh Wibowo, A.Md., Anak Krakatau Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 11:04 UTC (18:04 local) Ash-cloud not visible. Ash cloud is moving to North-West. Anak Krakatau .

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7th of February 2020, 2 weeks ago

2020-02-07 06:57:00 UTC Orange

Anak Krakatau - 20200207/0657Z 

Deny Mardiono, A.Md., Anak Krakatau Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 0519 UTC (1219 local). Ash-cloud not visible. Anak Krakatau volcano is not clear..

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6th of February 2020, 2 weeks ago

2020-02-06 09:37:00 UTC Orange

Dukono - 20200206/0937Z 

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

Eruption with volcanic ash cloud at 0911 UTC ( 1811 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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2020-02-06 02:13:00 UTC Orange

Anak Krakatau - 20200206/0213Z 

Bagus Puguh Wibowo, A.Md., Anak Krakatau Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 0149 UTC (0849 local) Ash-cloud not visible. Anak Krakatau volcano is not clear..

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5th of February 2020, 3 weeks ago

2020-02-05 22:27:00 UTC Orange

Dukono - 20200205/2227Z 

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

Eruption with volcanic ash cloud at 2219 UTC (0719 local). Best estimate of ash-cloud top is around 4573 FT (1429 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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4th of February 2020, 3 weeks ago

2020-02-04 23:30:00 UTC Orange

Semeru - 20200204/2330Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 2326 UTC (0626 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 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.