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
ETNA2016-02-25 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
ETNA2015-12-04 20:53:06Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-04 10:31:20Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-04 09:39:27Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-04 09:07:08Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-04 08:26:23Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-03 11:09:42Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-12-03 03:48:23Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-03 02:41:03Aviation Color Code: REDDOWNLOAD PDF
ETNA2015-12-02 23:04:21Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2015-12-02 21:44:09Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-11-28 16:51:10Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-11-27 09:45:17Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-10-27 10:32:39Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-10-27 09:37:12Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-08-30 17:52:03Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-08-29 17:36:17Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-08-22 18:23:46Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-08-21 16:00:15Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2015-05-20 14:30:42Aviation Color Code: GREENDOWNLOAD PDF
ETNA2015-05-20 06:45:29Aviation Color Code: YELLOWDOWNLOAD PDF
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