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
ETNA2015-01-31 18:58:27Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-01-31 07:47:32Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-01-22 15:10:27Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-01-19 14:08:56Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-01-13 11:49:34Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-01-13 07:48:01Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-01-09 08:32:13Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-01-03 05:51:36Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-01-02 06:36:05Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-12-29 10:58:21Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2014-12-29 05:50:00Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-12-28 21:02:29Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-12-28 18:23:37Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-12-28 17:55:32Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-12-28 17:36:11Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2014-08-17 10:28:29Aviation Color Code: GREENDOWNLOAD PDF
ETNA2014-08-16 12:44:53Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2014-08-15 11:08:55Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-11 21:32:32Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-08-11 11:00:12Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-08-10 07:47:24Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-09 19:50:45Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-08-09 17:30:34Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-09 10:08:08Aviation Color Code: REDDOWNLOAD PDF
ETNA2014-08-08 10:02:50Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-07 13:06:50Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-06 07:55:12Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-05 13:33:38Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-04 13:50:28Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-03 17:05:19Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-02 16:38:52Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-08-01 16:15:48Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-31 16:54:01Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-30 16:38:03Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-29 17:01:03Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-28 17:13:41Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-27 20:13:25Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-26 19:46:48Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-25 18:44:03Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-24 19:24:13Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-23 20:49:54Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-22 21:46:37Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-21 17:55:28Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-20 18:20:30Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2014-07-19 18:05:11Aviation Color Code: ORANGEDOWNLOAD PDF
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