Tvashtar erupting, Io
Digital work

The Galileo spacecraft was able to study huge eruptions on Tvashtar Paterae: A 25-kilometer long (16 mi),  1 to 2-kilometer high (0.62 to 1.24 mi) curtain of lava was seen, followed by a plume of gas rising 385 kilometers (239 mi) above the surface of Io. On February 2007 the New Horizons probe, on its way to Pluto, captured an enormous eruption with a 330-kilometer high (210 mi) plume.