The image is labeled to show the locations of many of Io's volcanoes: Amirani, Camaxtli, Chaac, Culann, Emakong, Gish Bar, Hi'iaka, Isum, Itzamna, Malik, Marduk, Masubi, Prometheus, Smahash, Thor, Tvashtar, Tupan, Zal, and Zamama. Masubi and Marduk are both actively erupting, producing plumes silhouetted against black space. Many of the others are also very likely in active eruption, but their plumes are not visible against the colorful surface of the moon.
Original image data dated on or about July 2, 1999.
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