{"id":361,"date":"2026-02-03T21:32:16","date_gmt":"2026-02-03T21:32:16","guid":{"rendered":"https:\/\/wovo.iavceivolcano.org\/?page_id=361"},"modified":"2026-02-03T22:44:45","modified_gmt":"2026-02-03T22:44:45","slug":"vona","status":"publish","type":"page","link":"https:\/\/wovo.iavceivolcano.org\/vona\/","title":{"rendered":"VONA"},"content":{"rendered":"\n

Overview<\/h2>\n\n\n\n
VONA<\/strong>, or Volcano Observatory Notice to Aviation<\/strong>, are standardised messages issued by volcano observatories to provide VAAC (Volcanic Ash Advisory Centre), pilots, air traffic controllers, and dispatchers with crucial, real-time information about volcanic unrest or eruptions that could produce hazardous ash clouds, using plain language and a defined colour-coded system (Green, Yellow, Orange, Red) for immediate hazard assessment. These alerts are vital for ensuring aviation safety by warning of ash plumes, which can damage aircraft engines and systems.<\/p>\n\n\n\n
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