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When wind-driven clouds encounter obstacles, in this case islands, they flow around them to form large, spinning eddies known as Karman vortices. The Karman vortices in this high-resolution satellite photo formed over the islands of Broutona, Chirpoy, and Brat Chirpoyev (Chirpoy's Brother), all part of the Kuril Island chain found between Russia's Kamchatka Peninsula and Japan. Image courtesy of USGS.