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
ETNA2015-05-20 06:45:29Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-05-17 05:12:33Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-05-16 17:41:05Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-05-16 07:08:11Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-05-14 17:46:33Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-05-14 15:33:12Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-05-14 09:41:44Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-05-14 07:41:34Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-05-13 18:17:20Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-05-12 10:15:35Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-05-12 02:50:05Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-05-07 12:35:13Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-05-04 08:02:30Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-05-03 05:10:15Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-05-03 04:58:35Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-02-03 13:53:17Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-02-03 10:04:14Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-02-02 09:10:38Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-02-02 05:59:01Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-02-01 07:11:06Aviation Color Code: ORANGEDOWNLOAD PDF
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
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