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
 

14th of July 2018, 3 years ago

2018-07-14 21:02:00 UTC Orange

Agung - 20180714/2102Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 2052 UTC (0452 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. _.

View
 

13th of July 2018, 3 years ago

2018-07-13 06:22:00 UTC Orange

Agung - 20180713/0622Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0609 UTC (1409 local). Eruption and ash emission is not 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
 

9th of July 2018, 3 years ago

2018-07-09 03:25:00 UTC Orange

Agung - 20180709/0325Z 

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

Eruption with volcanic ash cloud at 0320 UTC (1120 local). Eruption and ash emission is 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
 

8th of July 2018, 3 years ago

2018-07-08 08:05:00 UTC Orange

Agung - 20180708/0805Z 

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

Eruption with volcanic ash cloud at 0759 UTC (1559 local). Eruption and ash emission is not 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
2018-07-08 02:09:00 UTC Orange

Agung - 20180708/0209Z 

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

Eruption with volcanic ash cloud at 0200 UTC (1000 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 moving to west..

View
 

7th of July 2018, 3 years ago

2018-07-07 21:32:00 UTC Orange

Agung - 20180707/2132Z 

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

Eruption with volcanic ash cloud at 2122 UTC (0522 local). Eruption and ash emission is not 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 is moving west..

View
 

6th of July 2018, 3 years ago

2018-07-06 05:54:00 UTC Orange

Agung - 20180706/0554Z 

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

Eruption with volcanic ash cloud at 0449 UTC (1249 local). 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. -.

View
 

5th of July 2018, 3 years ago

2018-07-05 08:39:00 UTC Orange

Agung - 20180705/0839Z 

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

Eruption with volcanic ash cloud at 0833 UTC (1633 local). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 62746 FT (19014 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. The upper part of the ash-cloud is moving east while the bottom part is moving west..

View
 

4th of July 2018, 3 years ago

2018-07-04 17:08:00 UTC Orange

Agung - 20180704/1708Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1647 UTC (0047 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 moving to west.

View
2018-07-04 14:32:00 UTC Orange

Agung - 20180704/1432Z 

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

Eruption with volcanic ash cloud at 1416 UTC (2216 local). 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. Eruption not visible from ground observation..

View
2018-07-04 04:27:00 UTC Orange

Agung - 20180704/0427Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0420 UTC (1220 local). Eruption and ash emission is not continuing Best estimate of ash-cloud top is around 59578 FT (18054 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
 

3rd of July 2018, 3 years ago

2018-07-03 21:18:00 UTC Orange

Agung - 20180703/2118Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 2106 UTC (0506 local). Eruption and ash emission is not continuing 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 moving to west.

View
2018-07-03 19:36:00 UTC Orange

Agung - 20180703/1936Z 

Wahyu Ardi Setiawan, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 1925 UTC (0325 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
2018-07-03 01:35:00 UTC Orange

Agung - 20180703/0135Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 0128 UTC (0928 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
 

2nd of July 2018, 3 years ago

2018-07-02 20:22:00 UTC Orange

Agung - 20180702/2022Z 

Anwar Sidiq, Agung Volcano Observatory - 3 years ago

Eruption with volcanic ash cloud at 2013 UTC (0413 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
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.