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
 

2nd of July 2018, 3 years ago

2018-07-02 13:22:00 UTC Orange

Agung - 20180702/1322Z 

Devy Kamil Syahbana, Dr., S.Si., Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1304 UTC (2104 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 54298 FT (16454 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west-southwest..

View
2018-07-02 05:48:00 UTC Orange

Agung - 20180702/0548Z 

Devy Kamil Syahbana, Dr., S.Si., Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0543 UTC (1343 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 40570 FT (12294 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving west-southwest..

View
2018-07-02 05:20:00 UTC Orange

Agung - 20180702/0520Z 

Devy Kamil Syahbana, Dr., S.Si., Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0511 UTC (1311 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 38458 FT (11654 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving west-southwest..

View
 

1st of July 2018, 3 years ago

2018-07-01 22:43:00 UTC Orange

Agung - 20180701/2243Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 2219 UTC (0619 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 54298 FT (16454 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to West..

View
 

28th of June 2018, 3 years ago

2018-06-28 08:00:00 UTC Orange

Agung - 20180628/0800Z 

Martanto, S.T., Agung Volcano Observatory - 3 years ago

Continous emission observed since 0230 UTC (1030 Local) and still continuing. Best estimate of ash-cloud top is around 54298 FT (16454 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to West and Southwest..

View
2018-06-28 06:01:00 UTC Orange

Agung - 20180628/0601Z 

Martanto, S.T., Agung Volcano Observatory - 3 years ago

Continous emission observed since 0230 UTC (1030 Local) and still continuing. Best estimate of ash-cloud top is around 49018 FT (14854 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash cloud moving to West..

View
 

27th of June 2018, 3 years ago

2018-06-27 14:34:00 UTC Orange

Agung - 20180627/1434Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1421 UTC (2221 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 54298 FT (16454 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.

View
 

15th of June 2018, 3 years ago

2018-06-15 13:37:00 UTC Orange

Agung - 20180615/1337Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1315 UTC (2115 local). Eruption and ash emission is not observed due to cloudy at the submit Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash emission move to west according the wind direction to the west.

View
 

13th of June 2018, 3 years ago

2018-06-13 03:17:00 UTC Orange

Agung - 20180613/0317Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0305 UTC ( 1105local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 54298 FT (16454 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west dan southwest.

View
 

10th of June 2018, 3 years ago

2018-06-10 15:21:00 UTC Orange

Agung - 20180610/1521Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1414 UTC (2214 local). Eruption and ash emission is not continuing. Best estimate of ash-cloud top is around 0 FT (0 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.

View
 

28th of May 2018, 3 years ago

2018-05-28 23:07:00 UTC Orange

Agung - 20180528/2307Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 21:39 UTC (05:39 Local) Best estimate of ash-cloud top is around 38458 FT (11654 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving southwest.

View
 

19th of May 2018, 3 years ago

2018-05-19 09:37:00 UTC Orange

Agung - 20180519/0937Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 09:19 UTC (17:19 Local) Best estimate of ash-cloud top is around 43738 FT (13254 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving southeast.

View
 

30th of April 2018, 3 years ago

2018-04-30 15:17:00 UTC Orange

Agung - 20180430/1517Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 14:45 UTC (22:45 Local) Best estimate of ash-cloud top is around 49018 FT (14854 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving south west .

View
 

11th of April 2018, 3 years ago

2018-04-11 01:48:00 UTC Orange

Agung - 20180411/0148Z 

Nurul Husaeni, A.Md., Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 02:04 UTC (09:04 Local) Best estimate of ash-cloud top is around 38458 FT (11654 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving south west.

View
 

5th of April 2018, 3 years ago

2018-04-05 18:09:00 UTC Orange

Agung - 20180405/1809Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1737 UTC (0137 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 38458 FT (11654 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud is moving west.

View
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.