This is a list of named regions on Jupiter's moon Io. These names have been approved for use by the

International Astronomical Union The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...

. The features listed below represent a subset of the total known bright regions on Io's surface with many currently not having an officially approved name. These areas are large-scale regions on Io's surface that are notable for their difference in brightness or color from their surroundings. In most cases, these areas are bright terrains, consisting of

sulfur dioxide Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a colorless gas with a pungent smell that is responsible for the odor of burnt matches. It is r ...

frost/ice fields, suggesting that they are colder than their surroundings. The names of regions on Io use a combination of a name derived from locations in

Greek mythology Greek mythology is the body of myths originally told by the Ancient Greece, ancient Greeks, and a genre of ancient Greek folklore, today absorbed alongside Roman mythology into the broader designation of classical mythology. These stories conc ...

associated with the nymph Io or Dante's ''Inferno'', or from the name of a nearby feature on Io's surface and the descriptor term, ''regio'',

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

for region. Coordinate, diameter, and name source below come from the IAU's Solar System Nomenclature Website. See also the

list of mountains on Io More than 135 mountains of Io, mountains have been identified on the surface of Jupiter's moon Io (moon), Io. Despite the extensive active volcano, volcanism taking place on Io, most mountains on Io are formed through tectonic processes. These ...

and the

list of volcanic features on Io This is a list of named volcano, volcanic surface features on Jupiter, Jupiter's moon Io (moon), Io. These names have been approved for use by the International Astronomical Union. The features listed below represent a subset of the total known ...

Other regions on Io

References

USGS Planetary Nomenclature: Io
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