title: List of geological features on Io
text: # List of geological features on Io
  
  This is a list of named geological features on Io, a moon of Jupiter. See also the list of mountains on Io and the list of paterae on Io.
  
  ## Eruptive Centers
  
  Eruptive centers on Io, locations typically where major volcanic activity was observed and characterized before the volcanic landform was, are named after the gods of volcanoes and/or blacksmiths in various mythologies.
  
  | Volcano | Named after |
  | - | - |
  | Amirani | Amirani (Georgian) |
  | Kanehekili | Kanehekili (Hawaiian) |
  | Loki | Loki (Norse) |
  | Marduk | Marduk (Babylonian) |
  | Masubi | Ho-Masubi (Japanese) |
  | Maui | Māui (Hawaiian) |
  | Pele | Pele (Hawaiian) |
  | Prometheus | Prometheus (Greek) |
  | Surt | Surtur (Icelandic) |
  | Thor | Thor (Norse) |
  | Volund | Volund (Norse) |
  | Zamama | Zamama (Babylonian) |
  
  ## Catenae
  
  On Io, catenae /kəˈtiːnə/ (crater chains, sg. catena) are named after sun gods in various mythologies. In 2006, the use of the term catena was discontinued in favor of the patera /ˈpætərə/ (plural paterae /ˈpætəriː/). Below is a list of features that previously used the descriptor term catena.
  
  | Catena | Named after |
  | - | - |
  | Mazda Paterae | Ahura Mazda (Zoroastrian) |
  | Reshet Patera | Reshet (Aramaic) |
  | Tvashtar Paterae | Tvashtri (Hindu) |
  
  ## Fluctūs
  
  Ionian fluctus /ˈflʌktəs/ (areas of lava flow) are named after fire and thunder gods in various mythologies, or after locations in Greek mythology associated with Io.
  
  | Fluctus | Named after |
  | - | - |
  | Acala Fluctus | Acala (Buddhism) |
  | Arinna Fluctus | Arinna (Hittite) |
  | Donar Fluctus | Donar (Germanic) |
  | Euboea Fluctūs | Euboea (Greek) |
  | Fjorgynn Fluctus | Fjorgyn (Norse) |
  | Kanehekili Fluctus | Kanehekili (Hawaiian) |
  | Lei-Kung Fluctus | Lei Gong (Chinese) |
  | Lei-zi Fluctus | Lei Zi (Chinese) |
  | Marduk Fluctus | Marduk (Sumerian) |
  | Masubi Fluctus | Ho-Masubi (Japanese) |
  | Sobo Fluctus | Sobo (Vodou) |
  | Tsui Fluctus | Tsui (Khoikhoi) |
  | Tung Yo Fluctus | Tung Yo (Chinese) |
  | Uta Fluctus | Uta (Sumerian) |
  
  ## Mensae
  
  Ionian mensae /ˈmɛnsiː/ (mesas, sg. mensa) are named after mythological figures associated with fire or with the nymph Io.
  
  | Mensa | Named after |
  | - | - |
  | Capaneus Mensa | Capaneus (The Divine Comedy) |
  | Echo Mensa | Echo (Greek) |
  | Epaphus Mensa | Epaphus (Greek) |
  | Hermes Mensa | Hermes (Greek) |
  | Iynx Mensa | Iynx (Greek) |
  | Pan Mensa | Pan (Greek) |
  | Prometheus Mensa | Prometheus (Greek) |
  | Telegonus Mensae | Telegonus, husband of Io (Greek) |
  | Tvashtar Mensae | Tvashtar (Hindu) |
  
  ## Montes
  
  Ionian montes /ˈmɒntiːz/ (mountains and volcanos, sg. mons /ˈmɒnz/) are named after people and places associated with the nymph Io, and sun and fire gods in various other mythologies.
  
  ## Paterae
  
  Ionian paterae /ˈpætəriː/ (shallow craters and crater chains) are named after sun gods and fire gods in various mythologies.
  
  ## Plana
  
  Ionian plana /ˈpleɪnə/ (plateaus, sg. planum /ˈpleɪnəm/) are named after locations in Greek mythology associated with the nymph Io.
  
  | Planum | Named after |
  | - | - |
  | Argos Planum | Argos |
  | Danube Planum | Danube River |
  | Dodona Planum | Dodona |
  | Ethiopia Planum | Ethiopia |
  | Hybristes Planum | Hybristes |
  | Iopolis Planum | Iopolis |
  | Lyrcea Planum | Lyrcea |
  | Nemea Planum | Nemea |
  
  ## Regiones
  
  Ionian regiones /rɛdʒiˈoʊniːz/ (regions, sg. regio /ˈriːdʒioʊ/) are mostly named after locations in Greek mythology associated with the nymph Io.
  
  | Regio | Named after |
  | - | - |
  | Bactria Regio | Bactria |
  | Bosphorus Regio | Bosphorus |
  | Bulicame Regio | Bulicame (The Divine Comedy) |
  | Chalybes Regio | Chalybes |
  | Colchis Regio | Colchis |
  | Illyrikon Regio | Illyria |
  | Lerna Regio | Lerna |
  | Media Regio | Media |
  | Mycenae Regio | Mycenae |
  | Tarsus Regio | Tarsus |
  
  ## Tholi
  
  Ionian tholi /ˈθoʊlaɪ/ (hills, sg. tholus /ˈθoʊləs/) are named after mythological figures associated with fire or with the nymph Io.
  
  | Tholus | Named after | Coordinates |
  | - | - | - |
  | Apis Tholus | Apis (Greek) | 10°54′S 347°53′W﻿ / ﻿10.9°S 347.88°W﻿ / -10.9; -347.88﻿ (Apis Tholus) |
  | Inachus Tholus | Inachus (Greek) | 16°11′S 347°46′W﻿ / ﻿16.18°S 347.76°W﻿ / -16.18; -347.76﻿ (Inachus Tholus) |
  | Tsui Goab Tholus | Tsui (Khoikhoi) | 0°06′S 163°00′W﻿ / ﻿0.1°S 163.0°W﻿ / -0.1; -163.0﻿ (Tsui Goab Tholus) |
  