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
 

4th of February 2020, 3 weeks ago

2020-02-04 00:36:00 UTC Orange

Semeru - 20200204/0036Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 0033 UTC (0733 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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1st of February 2020, 3 weeks ago

2020-02-01 23:05:00 UTC Orange

Semeru - 20200201/2305Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 2256 UTC (0556 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 north.

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2020-02-01 11:36:00 UTC Yellow

Kerinci - 20200201/1136Z 

Rudra Wibowo, A.Md., Kerinci Volcano Observatory - 3 weeks ago

On 1 february 2020, observed brown ash emission at 10:59 UTC (17:59 Local Time). Best estimate of ash-cloud top is around 13136 FT (4105 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving northeast..

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29th of January 2020, 4 weeks ago

2020-01-29 23:54:00 UTC Orange

Semeru - 20200129/2354Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 2351 UTC (0651 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 north.

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28th of January 2020, 4 weeks ago

2020-01-28 01:10:00 UTC Yellow

Slamet - 20200128/0110Z 

Hetty Triastuty, Dr. S.Si, M.Sc, Slamet Volcano Observatory - 4 weeks ago

On 27 January 2020, observed thick white gas emission at 23:14 UTC (06:14 Local Time, January 28). Best estimate of ash-cloud top is around 11290 FT (3528 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Gas emission moving to south.

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26th of January 2020, 1 month ago

2020-01-26 22:56:00 UTC Orange

Semeru - 20200126/2256Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 4 weeks ago

Eruption with volcanic ash cloud at 2243 UTC (0543 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 south.

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25th of January 2020, 1 month ago

2020-01-25 23:09:00 UTC Orange

Semeru - 20200125/2309Z 

Mukdas Sofian, A.Md., Semeru Volcano Observatory - 4 weeks ago

Eruption with volcanic ash cloud at 2259 UTC (0559 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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24th of January 2020, 1 month ago

2020-01-24 23:34:00 UTC Orange

Semeru - 20200124/2334Z 

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

Eruption with volcanic ash cloud at 2315 UTC (0615 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 north.

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2020-01-24 01:28:00 UTC Yellow

Kerinci - 20200124/0128Z 

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

On 24 january 2020, observed brown ash emission at 01:06 UTC (08:06 Local Time). Best estimate of ash-cloud top is around 13776 FT (4305 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission moving northwest.

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2020-01-24 00:29:00 UTC Orange

Dukono - 20200124/0029Z 

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

Eruption with volcanic ash cloud at 2303 UTC (0803 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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23rd of January 2020, 1 month ago

2020-01-23 23:07:00 UTC Orange

Semeru - 20200123/2307Z 

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

Eruption volcanic ash cloude at 0043 (0543)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 cloude moving to west Seismic acttivity is caracterized by eruption,avalance and gas emision earthquarkes. .

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20th of January 2020, 1 month ago

2020-01-20 23:50:00 UTC Orange

Semeru - 20200120/2350Z 

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

Eruption with volcanic ash cloud at 2316 UTC (0616 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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19th of January 2020, 1 month ago

2020-01-19 22:52:00 UTC Orange

Semeru - 20200119/2252Z 

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

Eruption with volcanic ash cloud at 1235 UTC (0535 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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2020-01-19 04:16:00 UTC Orange

Dukono - 20200119/0416Z 

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

Eruption with volcanic ash cloud at 0349 UTC ( 1249 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 south..

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18th of January 2020, 1 month ago

2020-01-18 22:33:00 UTC Orange

Semeru - 20200118/2233Z 

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

Eruption with volcanic ash cloude at 0012 UTC (0512 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 cloude 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.