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
 

13th of February 2021, 8 months ago

2021-02-13 11:06:00 UTC Orange

Raung - 20210213/1106Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 1104 UTC (1804 Local Time ) Best estimate of ash-cloud top is around 45745 FT (13862 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east-northeast.

View
 

10th of February 2021, 8 months ago

2021-02-10 10:47:00 UTC Orange

Raung - 20210210/1047Z 

Rudra Wibowo, A.Md., Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 1047 UTC (1747 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 56305 FT (17062 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east-southeast..

View
 

9th of February 2021, 8 months ago

2021-02-09 23:43:00 UTC Orange

Raung - 20210209/2343Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 2350 UTC (0650 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 56305 FT (17062 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east..

View
2021-02-09 16:40:00 UTC Orange

Raung - 20210209/1640Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 1630 UTC (2330 Local Time ). Eruption and ash emission is continuing . Best estimate of ash-cloud top is around 56305 FT (17062 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east. .

View
2021-02-09 01:14:00 UTC Yellow

Raung - 20210209/0114Z 

Rudra Wibowo, A.Md., Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 0119 UTC (0819 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 61585 FT (18662 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east. .

View
 

8th of February 2021, 8 months ago

2021-02-08 23:47:00 UTC Orange

Raung - 20210208/2347Z 

Rudra Wibowo, A.Md., Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 2250 UTC (0550 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 56305 FT (17062 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east. .

View
 

7th of February 2021, 8 months ago

2021-02-07 22:48:00 UTC Orange

Raung - 20210207/2248Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 2245 UTC (0545 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 56305 FT (17062 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east southeast. .

View
2021-02-07 13:37:00 UTC Orange

Raung - 20210207/1337Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 1320 UTC (2020 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 47857 FT (14502 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east. .

View
 

6th of February 2021, 8 months ago

2021-02-06 22:49:00 UTC Orange

Raung - 20210206/2249Z 

Burhan Alethea, A.Md., Raung Volcano Observatory - 8 months ago

On 7 February 2021, Eruption with volcanic ash cloud 2200 UTC ( 0500 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 45745 FT (13862 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east-southeast.

View
2021-02-06 12:41:00 UTC Orange

Raung - 20210206/1241Z 

Rudra Wibowo, A.Md., Raung Volcano Observatory - 8 months ago

On 6 February 2021, Eruption with volcanic ash cloud 1246 UTC ( 19:46 Local Time ). Eruption and ash emission is continuing Best estimate of ash-cloud top is around 41521 FT (12582 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east .

View
 

3rd of February 2021, 8 months ago

2021-02-03 23:12:00 UTC Orange

Raung - 20210203/2312Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 2310 UTC ( 06:10 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 40465 FT (12262 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east .

View
 

2nd of February 2021, 8 months ago

2021-02-02 16:55:00 UTC Orange

Raung - 20210202/1655Z 

Burhan Alethea, A.Md., Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 1654 UTC ( 23:54 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 45745 FT (13862 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east .

View
 

1st of February 2021, 8 months ago

2021-02-01 23:08:00 UTC Orange

Raung - 20210201/2308Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 2310 UTC ( 06:10 Local Time ). Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 40465 FT (12262 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east .

View
2021-02-01 06:53:00 UTC Orange

Raung - 20210201/0653Z 

Mukijo, Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 0650 UTC ( 13:50 Local Time ), Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 40465 FT (12262 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to east.

View
 

27th of January 2021, 8 months ago

2021-01-27 20:08:00 UTC Orange

Raung - 20210127/2008Z 

Burhan Alethea, A.Md., Raung Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud 19:35 UTC ( 02:35 Local Time ), Eruption and ash emission is continuing. Best estimate of ash-cloud top is around 42577 FT (12902 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash moving to East-Southeast.

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.