The Italian volcano Etna has started erupting smoke rings
— NEXTA (@nexta_tv) April 5, 2024
This phenomenon is rare, as smoke rings are formed only with a specific crater shape and geometry. pic.twitter.com/ndo94Z1LJE
They're not UFOs, angel halos, or a bit of Gandalf wizardry. These otherworldly photos show an extremely rare phenomenon called "volcanic smoke rings." 🌋
— AccuWeather (@accuweather) April 6, 2024
📍 Mt. Etna, Sicily, Italy
📅 April 5, 2024https://t.co/mMn0DcgQah pic.twitter.com/SeTfywZ2Lb
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The rings arose from Mount Etna, Europe's most active volcano. Etna rises 11,000 feet above the island of Sicily in the middle of the Mediterranean Sea. The volcano erupts frequently, and its explosions have been documented for more than 3,500 years.
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Until recently, how the smoke rings form wasn't well understood. Formation requires a calm atmosphere and a circular volcanic vent. And, technically, it isn't really smoke. When hot volcanic gases are released suddenly from the vent in a short pulse, the gases rush upwards and create a cloud, not unlike plane contrails. While the smoke rings have been documented at volcanoes worldwide, multiple displays like this one are extremely rare.
Kind of cool and scary at the same time for a volcano.