List of volcanic features on Io


This is a list of named volcanic surface features 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 volcanic features on Io's surface with the majority currently not having an officially approved name.
The names of volcanic features on Io use a combination of a name derived from mythological figures from around the world related to the Sun, fire, volcanoes, thunder, or smithing, places from the Greek mythological story of Io, Dante's Inferno, or from the name of a nearby feature on Io's surface and an approved descriptive term. The descriptive term used is based on the type of feature named and how it was first discovered. Volcanoes that were first observed as an active feature from observations of a volcanic plume fit under the category of "Eruptive Center" and do not use a descriptive term, though portions of these features may have also received names that do use a descriptive term, like Prometheus Patera or Masubi Fluctus. Lava flows use the descriptive term fluctus or the plural fluctūs, e.g. Acala Fluctus. Volcanic depressions use the term patera or the plural paterae, e.g. Ah Peku Patera. The term has also become the generic term for referring to these structures. Small shield volcanoes use the term tholus or the plural tholi, e.g. Inachus Tholus. Finally, channels carved by volcanic lava flows through thermal erosion use the term vallis or the plural valles.
See also the list of mountains on Io and the list of regions on Io.

Eruptive centers

Eruptive centers on Io are locations typically where major volcanic activity was observed and characterized before the volcanic landform was. Coordinate, diameter, and name source come from the IAU's Solar System Nomenclature Website. All of these features have been observed as active volcanoes on Io.
VolcanoNamed afterCoordinates
AmiraniAmirani
KanehekiliKāne Milohai
LokiLoki
MardukMarduk
MasubiHo-Masubi
MauiMāui
PelePele
PrometheusPrometheus
SurtSurtr
ThorThor
VolundVölundr
ZamamaZamama

Paterae

The following table lists named volcanic depressions or paterae on Io. Coordinate, diameter, and name source come from the IAU's Solar System Nomenclature Website. Notes on whether the patera has been observed as an active volcano by either ground-based astronomers, the Hubble Space Telescope, or the various spacecraft that have encountered the Jupiter system come from the book, Volcanism on Io, unless otherwise noted.
In 2006, the use of the term catena, for Ionian volcanoes with multiple depressions, was discontinued in favor of the plural paterae. These features are Tvashtar Paterae, Reshet Paterae, and Mazda Paterae.
PateraNamed afterCoordinatesDiameter Activity Observed
Ababinili PateraAbabinili 105.0No
Agni PateraAgni 19.7No
Ah Peku PateraAh Peku 84.0Yes
Aidne PateraAidne 30.26Yes
Altjirra PateraAltjira 52.55Yes
Amaterasu PateraAmaterasu 93.1Yes
Angpetu PateraAngpetu 13.68No
Aramazd PateraAramazd 68.82No
Arusha PateraArusha 68.07Yes
Asha PateraAsha 108.33Yes
Ātar PateraAtar 86.41Yes
Aten PateraAten 43.4Yes
Babbar PateraBabbar 85.74Yes
Balder PateraBalder 42.0No
Belenus PateraBelenus 23.01No
Bochica PateraBochica 52.38No
Camaxtli PateraCamaxtli 58.39Yes
Carancho PateraCarancho 30.04No
Cataquil PateraCatequil 133.95No
Catha PateraCautha 68.59Yes
Chaac PateraChaac 95.88Yes
Chors PateraChors 64.97Yes
Creidne PateraCreidhne 152.82Yes
Cuchi PateraCuchi 76.28Yes
Culann PateraCulann 54.48Yes
Daedalus PateraDaedalus 73.29Yes
Dazhbog PateraDazhbog 118.39Yes
Dingir PateraDingir 47.38No
Dusura PateraDusura 68.58Yes
Ekhi PateraEkhi 51.04Yes
Emakong PateraEmakong 80.08Yes
Estan PateraEstan 95.0Yes
Fo PateraFo 47.15Yes
Fuchi PateraKamuy Fuchi 63.67Yes
Gabija PateraGabija 48.0Yes
Galai PateraGalai 105.23No
Gibil PateraGibil 102.38Yes?
Girru PateraGirru 68.23Yes
Gish Bar PateraGish Bar 122.25Yes
Grannos PateraGrannus 45.0No
Grian PateraGrian 70.0Yes
Haokah PateraHaokah 53.86Yes
Hatchawa PateraHatchawa 84.98No
Heiseb PateraHeiseb 62.48No
Heno PateraHeno 71.06Yes
Hephaestus PateraHephaestus 38.84Yes
Hi'iaka PateraHi'iaka 128.27Yes
Hiruko PateraHiruko 89.54No
Horus PateraHorus 144.21No
Huo Shen PateraHuo Shen 62.73No
Ilmarinen PateraIlmarinen 45.94No
Inti PateraInti 70.91No
Isum PateraIsum 62.24Yes
Itzamna PateraItzamna 126.36Yes
Janus PateraJanus 60.07Yes
Kami-Nari PateraKami-Nari 53.39No
Kane PateraKāne 135.77No
Karei PateraKarei 35.29Yes
Kava PateraKava 63.82No
Khalla PateraKhalla 48.24No
Kibero PateraKibero 63.34No
Kinich Ahau PateraKinich Ahau 45.21Yes
Kurdalagon PateraKurdalagon 28.15Yes
Laki-oi PateraLaki-oi 105.16No
Llew PateraLlew 78.0Yes
Loki PateraLoki 227.79Yes
Lu Huo PateraLu Huo 63.95No
Maasaw PateraMasau'u 43.99No
Mafuike PateraMahu-ike 148.32No
Malik PateraMalik 121.68Yes
Mama PateraMama 15.72No
Manua PateraManua 110.51Yes
Masaya PateraMasaya 55.09No
Maui PateraMāui 37.84Yes
Mazda PateraeAhura Mazda 240.78Yes
Mbali PateraMbali 40.7Yes
Menahka PateraMenahka 9.15No
Mentu PateraMentu 103.0No
Michabo PateraMichabo 104.0Yes
Mihr PateraMihr 61.72Yes
Mithra PateraMithra 33.78Yes
Monan Pateraa god of the Tupí-Guaraní 112.89Yes
Mulungu PateraMulungu 62.48Yes
Namarrkun PateraNamarrkun 16.69No
Nina PateraNina 52.07No
Nunurta PateraNinurta 82.34No
Nusku PateraNusku 124.31Yes
Nyambe PateraNyambe 58.15No
Ot PateraOt Ene 52.26Yes
Päive PateraPäive 59.05No
Pautiwa PateraPautiwa 6.62No
Pillan PateraPillan 73.43Yes
Podja PateraPodja 67.03No
Prometheus PateraPrometheus 73.43Yes
Purgine PateraPurgine 35.74No
Pyerun PateraPerun 52.18Yes
Ra PateraRa 39.11Yes
Radegast PateraRadagast 27.11Yes
Rarog PateraRarog 104.35Yes
Rata PateraRātā 46.31Yes
Reiden PateraReiden 73.26Yes
Reshef PateraReshef 62.0No
Reshet PateraeReshet 148.34No
Ruaumoko PateraRuaumoko 19.0Yes
Ruwa PateraRuwa 62.44Yes
Savitr PateraSavitr 92.48No
Sêd PateraSêd 52.1No
Sengen PateraSengen 63.64Yes
Seth PateraSeth 59.82Yes
Sethlaus PateraSethlans 78.57Yes
Shakuru PateraShakuru 105.01Yes
Shamash PateraShamash 205.3Yes
Shamshu PateraShamshu 96.36Yes
Shango PateraShango 90.22Yes
Shoshu PateraShoshu 13.08No
Sigurd PateraSigurd 68.6Yes
Siun PateraSiun 52.5No
Steropes PateraSteropes 20.0No
Sui Jen PateraSui Jen 33.78No
Surya PateraSurya 49.81Yes
Susanoo PateraSusanoo 58.41Yes
Svarog PateraSvarog 124.03Yes
Talos PateraTalos 24.67No
Taranis PateraTaranis 130.67No
Taw PateraTaw 4.74No
Tawhaki PateraTawhaki 49.85Yes
Thomagata PateraThomagata 59.0No
Tien Mu PateraTien Mu 28.0Yes
Tiermes PateraTiermes 79.76No
Tohil PateraTohil 76.59No
Tol-Ava PateraTol-Ava 84.53No
Tung Yo PateraTung Yo 59.68No
Tupan Paterathe thunder god Tupan of the Tupí-Guaraní people of Brazil79.13Yes
Tvashtar PateraeTvashtri 306.19Yes
Ukko PateraUkko 35.25Yes?
Ülgen PateraÜlgen 43.89Yes
Uta PateraUtu 43.89Yes
Vahagn PateraVahagn 99.6No
Viracocha PateraViracocha 59.3Yes
Vivasvant PateraVivasvant 83.19Yes
Wabasso PateraWabasso 32.0No
Wayland PateraWayland the Smith 63.37Yes
Yaw PateraYaw 39.0Yes
Zal PateraZal 165.94Yes

Lava flows

Ionian fluctūs are named after fire and thunder gods in various mythologies, or after locations in Greek mythology associated with Io. Coordinate, length, and name source come from the IAU's Solar System Nomenclature Website. Notes on whether the lava flow has been observed as part of an active volcano by either ground-based astronomers, the Hubble Space Telescope, or the various spacecraft that have encountered the Jupiter system come from the book, Volcanism on Io, unless otherwise noted.
FluctusNamed afterCoordinatesLengthActivity Observed
Acala FluctusAcala 411.11 kmYes
Arinna FluctusArinna 121.94 kmYes
Donar FluctusDonar 222.47 kmYes
Euboea FluctūsEuboea 104.82 kmNo
Fjorgynn FluctusFjorgyn 414.07 kmYes
Kanehekili FluctusKāne Milohai 243.47 kmYes
Lei-Kung FluctusLei Gong 386.17 kmYes
Lei-zi FluctusLei Zi 361.1 kmNo
Marduk FluctusMarduk 169.43 kmYes
Masubi FluctusHo-Masubi 501.33 kmYes
Sobo FluctusSobo 58.83 kmYes
Tsũi Goab FluctusTsui 117.0 kmYes
Tung Yo FluctusTung Yo 459.37 kmNo
Uta FluctusUtu 332.31 kmNo

Shield volcanoes

Ionian shield volcanoes or tholi are named after mythological figures associated with fire or with the nymph Io.
TholusNamed afterCoordinatesLengthHeight
Apis TholusApis 145.71 kmN/A
Inachus TholusInachus 176.96 km1.8 km
Tsũi Goab TholusTsui 53.0 km0.8 km

Lava channels

Ionian lava channels that cut into the surrounding terrain use the term vallis.
VallisNamed afterCoordinatesLength
Tawhaki VallisTawhaki 190.0 kilometer