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
ETNA2019-05-14 11:25:17Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2019-05-08 14:11:27Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2019-05-07 15:55:10Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-05-01 13:37:51Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-05-01 12:43:16Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2019-03-05 11:43:02Aviation Color Code: GREENDOWNLOAD PDF
ETNA2019-02-25 09:24:04Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2019-02-22 08:39:13Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-21 08:29:43Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-02-21 05:48:50Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-19 06:13:43Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-02-18 13:13:34Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-18 07:21:25Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-02-18 06:39:02Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-17 17:21:34Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-02-17 16:38:19Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-14 15:09:03Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2019-02-14 10:59:23Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-13 10:45:27Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2019-02-10 08:21:11Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-10 06:33:15Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-02-09 07:26:08Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-09 06:00:19Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-02-08 10:00:02Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-02-08 07:21:31Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-01-27 05:41:14Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-01-26 09:46:04Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-01-23 15:28:14Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-01-23 10:17:12Aviation Color Code: REDDOWNLOAD PDF
ETNA2019-01-22 12:57:17Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2019-01-08 08:58:04Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2018-12-25 10:04:43Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2018-12-24 19:10:47Aviation Color Code: REDDOWNLOAD PDF
ETNA2018-12-24 16:00:51Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2018-12-24 11:01:30Aviation Color Code: REDDOWNLOAD PDF
ETNA2018-12-06 11:16:27Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2018-09-01 10:26:05Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2018-08-24 17:04:03Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2018-08-24 08:35:29Aviation Color Code: REDDOWNLOAD PDF
ETNA2018-08-23 19:23:23Aviation Color Code: ORANGEDOWNLOAD PDF
ETNA2018-07-18 16:58:44Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2018-05-13 15:34:25Aviation Color Code: GREENDOWNLOAD PDF
ETNA2018-05-13 11:52:06Aviation Color Code: YELLOWDOWNLOAD PDF
ETNA2018-05-11 22:59:33Aviation Color Code: GREENDOWNLOAD PDF
ETNA2018-05-11 20:04:06Aviation Color Code: YELLOWDOWNLOAD PDF
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