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
 

15th of December 2018, 1 year ago

2018-12-15 21:54:00 UTC Red

Soputan - 20181215/2154Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 2340 UTC (0540 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 28189 FT (8809 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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2018-12-15 20:00:00 UTC Orange

Soputan - 20181215/2000Z 

Dr. Devy Kamil Syahbana, S.Si., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud started on 15 December 2018 at 17:02 UTC (16 December 2018 at 01:02 localtime). During the initial phase of the eruption, ash cloud was not visible due to heavy fog. Two hours later, we could see the summit and eruption was visible with an ash plume of around 3000 m above the summit or more than 4800 m above sea level. Eruption and ash emission are continuing. Best estimate of ash-cloud top is around 15389 FT (4809 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving Southeast. Ash fall was reported by people living in Liwitung area (SE of the volcano)..

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16th of October 2018, 1 year ago

2018-10-16 14:34:00 UTC Yellow

Soputan - 20181016/1434Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

No sign of volcanic ash. White smoke observed. Ash-cloud not visible. No volcanic ash observed..

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3rd of October 2018, 1 year ago

2018-10-03 22:50:00 UTC Orange

Soputan - 20181003/2250Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 1036 UTC (0636 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 10589 FT (3309 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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2018-10-03 15:58:00 UTC Orange

Soputan - 20181003/1558Z 

Syegi Lenarahmi Kunrat, S.Si., Soputan Volcano Observatory - 1 year ago

Strombolian eruption with ash cloud at 1414 UTC (2214 local time). Eruption and ash emission is still ongoing. Best estimate of ash-cloud top is around 13789 FT (4309 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick dark-grey volcanic cloud moved toward northwest..

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2018-10-03 15:04:00 UTC Red

Soputan - 20181003/1504Z 

Syegi Lenarahmi Kunrat, S.Si., Soputan Volcano Observatory - 1 year ago

Strombolian eruption with volcanic ash cloud at 1414 UTC (2214 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 13789 FT (4309 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Thick dark-grey volcanic cloud moved toward northwest..

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2018-10-03 10:20:00 UTC Red

Soputan - 20181003/1020Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0943 UTC (1743 ocal). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 24989 FT (7809 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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2018-10-03 04:18:00 UTC Red

Soputan - 20181003/0418Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0352 UTC (1152 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 21789 FT (6809 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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2018-10-03 03:59:00 UTC Orange

Soputan - 20181003/0359Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0312 UTC (1112 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 13789 FT (4309 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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2018-10-03 03:10:00 UTC Orange

Soputan - 20181003/0310Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0244 UTC (1044 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 12189 FT (3809 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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2018-10-03 01:09:00 UTC Orange

Soputan - 20181003/0109Z 

Martanto, S.T., Soputan Volcano Observatory - 1 year ago

Eruption with volcanic ash cloud at 0047 UTC (0847 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 18589 FT (5809 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north west..

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2nd of October 2018, 1 year ago

2018-10-02 10:46:00 UTC Yellow

Soputan - 20181002/1046Z 

Syegi Lenarahmi Kunrat, S.Si., Soputan Volcano Observatory - 1 year ago

Increasing in seismic events has been detected since end of August, 2018, and it still ongoing until present. Ash-cloud not visible. No sign on volcanic ash at the surface yet..

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4th of January 2016, 4 years ago

2016-01-04 10:00:00 UTC Yellow

Soputan - 20160104/1000Z 

Martanto, S.T., Soputan Volcano Observatory - 4 years ago

Eruption with volcanic ash cloud at 1253 UTC (2053 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 39956 FT (12108 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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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.