List of regions on Io

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 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 frost/ice fields, suggesting that they are colder than their surroundings.^[1]

The names of regions on Io use a combination of a name derived from locations in Greek mythology 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 for region. Coordinate, diameter, and name source below come from the IAU's Solar System Nomenclature Website.^[2]

See also the list of mountains on Io and the list of volcanic features on Io.

Map of Io's surface with named regions labeled

Other regions on Io

References

• USGS Planetary Nomenclature: Io

Io
Main articles	Io Volcanology of Io Exploration of Io
Geology	Lists Regions Mountains Volcanic Features Quadrangles Paterae Ah Peku Amaterasu Asha Babbar Dazhbog Estan Fuchi Gish Bar Kami-Nari Kinich Ahau Loki Manua Maui Mithra Monan Pillan Prometheus Pyerun Reiden Shango Svarog Tawhaki Thomagata Tupan Tvashtar Viracocha Mountains Egypt Euboea Silpium Tohil Lava flows or channels Tawhaki Volcanoes Amirani Masubi Pele Prometheus Surt Thor Zamama Fluctūs Kanehekili Fluctus Plains and plateaus Danube Planum
Exploration	Past Pioneer program Pioneer 10 Pioneer 11 Voyager program Voyager 1 Voyager 2 Galileo Cassini New Horizons Proposed Io Volcano Observer Cancelled/ Concepts Jupiter Icy Moons Orbiter Jupiter Magnetospheric Orbiter