Volcano Observatory Notices for Aviation (VONA)
Volcano Observatory Notices for Aviation (VONA) are succinct, plain-English messages aimed at dispatchers, pilots, and air-traffic controllers to inform them of volcanic unrest and eruptive activity that could produce ash-cloud hazards.


DISCLAIMER
Using volcanic cloud height data for publication is only allowed if the following papers are cited:
VOLCANO
DATE
DESCRIPTION
FILE TYPE
ETNA2025-06-02 18:11:56Aviation Color Code: GREENDOWNLOAD PDF
ETNA2025-06-02 14:56:24Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-06-02 14:00:11Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-06-02 09:18:32Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-06-02 06:39:00Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-06-02 03:32:16Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-06-02 02:02:29Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-06-02 01:23:19Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-05-13 06:00:03Aviation Color Code: GREENDOWNLOAD PDF
ETNA2025-05-13 04:11:59Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-05-13 01:46:53Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-05-12 19:59:05Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-05-12 18:45:50Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-05-12 16:30:32Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-05-06 17:07:49Aviation Color Code: GREENDOWNLOAD PDF
ETNA2025-05-06 05:26:00Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-05-05 16:57:41Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-05-05 15:37:56Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-05-05 12:53:00Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-30 16:31:35Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-30 07:39:42Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-30 05:48:16Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-04-30 03:01:52Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-29 22:31:50Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-23 06:06:45Aviation Color Code: GREENDOWNLOAD PDF
ETNA2025-04-23 05:07:13Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-22 18:25:32Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-22 18:12:40Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-20 07:04:15Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-19 06:46:17Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-18 17:31:11Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-15 17:52:21Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-15 08:06:46Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-15 07:45:22Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-12 06:12:39Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-11 17:09:54Aviation Color Code: ORANGEDOWNLOAD PDF
STROMBOLI2025-04-11 17:01:05Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-11 14:25:15Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-11 13:50:49Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-08 15:52:54Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2025-04-08 08:11:36Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-08 04:18:13Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-04-08 00:03:35Aviation Color Code: REDDOWNLOAD PDF
ETNA2025-04-07 23:31:05Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2025-04-04 06:38:31Aviation Color Code: ORANGEDOWNLOAD PDF
 AVANTI