Wikipedia
Masubi (volcano)
Masubi is an active volcano on Jupiter's moon Io. It is located on Io's leading hemisphere at within a bright terrain region named Tarsus Regio. A volcanic plume has been observed at Masubi by various spacecraft starting with Voyager 1 in 1979, though it has not been persistent like similar Ionian volcanoes Amirani and Prometheus. Masubi is also notable for having one of the largest active lava flows on Io, with an additional flow forming between 1999 and 2007.