E ring

…activity is responsible for Saturn’s E ring, a tenuous ring of micrometre-sized particles of water ice condensed from vapour ejected by the geysers. The particles are densest near Enceladus’s orbit and are analogous to the cloud of orbiting particles ejected from Jupiter’s volcanically active moon Io. The E ring, however,…

…icy material for the diffuse E ring in which it orbits. The cause of the region’s thermal activity remains to be deduced, but it is likely to be related to some form of tidal deformation.

…the extremely broad and diffuse E ring, which extends from 3 to at least 8 Saturn radii. Cassini observations have verified that the E ring is composed of ice particles originating from geysers (a form of ice volcanism, or cryovolcanism) at a thermally active region—a hot spot—near the south pole…

…micrometre-sized ice particles from Saturn’s E ring, in which Tethys is well-embedded. Cited as evidence is the observation that many of the craters on Tethys have bright floors, whereas the craters on Saturn’s moon Hyperion, which orbits relatively far from Tethys and the E ring, tend to have dark floors.…