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
ETNA2016-05-20 08:44:42Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-05-19 14:46:15Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-19 05:19:23Aviation Color Code: REDDOWNLOAD PDF
ETNA2016-05-18 16:24:21Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-18 11:05:29Aviation Color Code: REDDOWNLOAD PDF
ETNA2016-05-17 20:55:18Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2016-05-17 14:21:44Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-05-08 10:24:22Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-05-07 13:01:29Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-04-24 10:00:21Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-04-22 13:37:50Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-04-15 13:14:43Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-04-15 07:46:18Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-04-01 06:45:12Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-04-01 04:49:49Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-03-31 12:33:02Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-03-31 07:34:13Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-03-23 10:08:13Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-03-23 08:11:13Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-02-25 07:41:10Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-02-25 07:14:56Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-02-23 06:04:13Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-02-23 03:54:09Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-02-06 16:42:28Aviation Color Code: GREENDOWNLOAD PDF
ETNA2016-02-06 09:38:13Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2016-01-09 11:10:33Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-12-28 10:10:14Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-12-19 15:09:25Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-12-14 08:09:15Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-12-12 09:59:13Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-11 08:04:28Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-12-09 18:29:09Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-09 07:17:33Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-08 05:56:11Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-07 14:13:10Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-07 06:00:20Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-06 12:20:45Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-06 12:16:09Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-06 11:20:05Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-05 17:31:29Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-05 14:57:31Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-05 14:40:14Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-05 12:16:10Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-05 06:18:23Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-04 22:29:24Aviation Color Code: REDDOWNLOAD PDF
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