Surt (volcano)

[1] Surt consists of an oblong volcanic pit (known as a patera), 75 by 40 kilometres (47 by 25 mi) in diameter, surrounded by reddish sulfur and bright sulfur dioxide deposits to its south and east.

[2][3] The volcano was first observed in images acquired by the Voyager 1 spacecraft in March 1979.

[4] Later that year, the International Astronomical Union named this feature after Surtr, a leader of the fire giants of Norse mythology.

[2][5] When Voyager 2 encountered the Jupiter system in July 1979, the eruption appeared to have ceased, but a fresh, 600 kilometres (370 mi)-wide plume deposit was observed surrounding Surt.

[3] Fresh, sulfur-rich, reddish deposits were seen in images acquired by Galileo in August 2001 to the northeast of Surt.