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
ETNA2017-06-01 09:36:10Aviation Color Code: GREENDOWNLOAD PDF
ETNA2017-05-26 06:23:34Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-05-22 10:07:04Aviation Color Code: GREENDOWNLOAD PDF
ETNA2017-05-12 13:31:57Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-04-29 09:24:44Aviation Color Code: GREENDOWNLOAD PDF
ETNA2017-04-28 09:47:24Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-04-27 12:46:35Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-04-27 03:46:46Aviation Color Code: REDDOWNLOAD PDF
ETNA2017-04-26 22:37:26Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-04-26 18:34:17Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-04-26 14:41:44Aviation Color Code: GREENDOWNLOAD PDF
ETNA2017-04-22 06:44:49Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-04-19 10:02:18Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-04-16 15:29:13Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-04-13 20:23:01Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-04-10 10:23:23Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-03-20 12:18:16Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-03-18 13:32:06Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-03-17 22:16:45Aviation Color Code: REDDOWNLOAD PDF
ETNA2017-03-17 11:10:32Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-03-17 06:58:21Aviation Color Code: REDDOWNLOAD PDF
ETNA2017-03-17 05:14:18Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-03-16 14:17:46Aviation Color Code: REDDOWNLOAD PDF
ETNA2017-03-15 07:49:26Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-03-06 16:18:43Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-03-02 13:20:01Aviation Color Code: GREENDOWNLOAD PDF
ETNA2017-03-02 08:36:28Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-02-27 18:19:24Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2017-02-17 12:57:19Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2017-01-24 07:56:14Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-10-12 14:42:46Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-10-10 15:26:37Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-08-22 15:02:07Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-08-07 19:40:03Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-05-30 08:00:36Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-05-26 05:38:23Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-05-25 04:18:43Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-24 22:34:39Aviation Color Code: REDDOWNLOAD PDF
ETNA2016-05-24 19:44:06Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-23 10:47:03Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-05-22 22:14:35Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-21 07:20:29Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-05-21 06:16:06Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-21 02:32:30Aviation Color Code: REDDOWNLOAD PDF
ETNA2016-05-20 19:42:17Aviation Color Code: ORANGEDOWNLOAD PDF
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