List of volcanic features on Io

Jupiter moon Io volcanic activity (left: December 14, 2022; right: March 1, 2023)

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

Culann Patera (greenish features above center) with associated lava flows and red volcanic plume deposits. Portions of Tohil Patera to the lower right.

The Eruptive Center Prometheus

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. ^[1] All of these features have been observed as active volcanoes on Io.

Volcano	Named after	Coordinates
Amirani	Amirani (Georgian)	24°28′N114°41′W / 24.46°N 114.68°W / 24.46; -114.68 (Amirani)
Kanehekili	Kāne Milohai (Hawaiian)	18°13′S33°37′W / 18.21°S 33.61°W / -18.21; -33.61 (Amirani)
Loki	Loki (Norse)	18°13′N302°34′W / 18.22°N 302.56°W / 18.22; -302.56 (Loki)
Marduk	Marduk (Babylonian)	29°17′S209°44′W / 29.29°S 209.74°W / -29.29; -209.74 (Marduk)
Masubi	Ho-Masubi (Japanese)	49°36′S56°11′W / 49.6°S 56.18°W / -49.6; -56.18 (Masubi)
Maui	Māui (Hawaiian)	19°32′N122°19′W / 19.53°N 122.31°W / 19.53; -122.31 (Maui)
Pele	Pele (Hawaiian)	18°43′S255°17′W / 18.71°S 255.28°W / -18.71; -255.28 (Pele)
Prometheus	Prometheus (Greek)	1°31′S153°56′W / 1.52°S 153.94°W / -1.52; -153.94 (Prometheus)
Surt	Surtr (Icelandic)	45°13′N336°29′W / 45.21°N 336.49°W / 45.21; -336.49 (Surt)
Tonatiuh	Tonatiuh (Aztec)	52°N77°W / 52°N 77°W / 52; -77 (Tonatiuh)
Thor	Thor (Norse)	39°09′N133°08′W / 39.15°N 133.14°W / 39.15; -133.14 (Thor)
Volund	Völundr (Norse)	28°37′N172°30′W / 28.62°N 172.5°W / 28.62; -172.5 (Volund)
Xihe	Xihe (Chinese)	55°S290°W / 55°S 290°W / -55; -290 (Xihe)
Zamama	Zamama (Sumerian)	18°26′N172°35′W / 18.43°N 172.59°W / 18.43; -172.59 (Zamama)

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. ^[1] 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. ^[2]

In 2006, the use of the term catena /kəˈtiːnə/ , for Ionian volcanoes with multiple depressions, was discontinued in favor of the plural paterae /ˈpætərə/ . These features are Tvashtar Paterae, Reshet Paterae, and Mazda Paterae.

Patera	Named after	Coordinates	Diameter (km)	Activity Observed
Ababinili Patera	Ababinili (Chickasaw)	12°47′N142°10′W / 12.79°N 142.16°W / 12.79; -142.16 (Ababinili Patera)	105.0	No
Agni Patera	Agni (Hindu and others)	40°48′S333°03′W / 40.8°S 333.05°W / -40.8; -333.05 (Agni Patera)	19.7	No
Ah Peku Patera	Ah Peku (Mayan)	10°20′N107°02′W / 10.34°N 107.04°W / 10.34; -107.04 (Ah Peku Patera)	84.0	Yes
Aidne Patera	Aidne (Irish)	34°24′S177°05′W / 34.4°S 177.09°W / -34.4; -177.09 (Aidne Patera)	30.26	Yes
Altjirra Patera	Altjira (Australian Aboriginal)	1°47′S108°58′W / 1.78°S 108.97°W / -1.78; -108.97 (Altjirra Patera)	52.55	Yes
Amaterasu Patera	Amaterasu (Japanese)	38°08′N306°32′W / 38.13°N 306.53°W / 38.13; -306.53 (Amaterasu Patera)	93.1	Yes
Angpetu Patera	Angpetu (Dakota)	21°09′S8°47′W / 21.15°S 8.79°W / -21.15; -8.79 (Angpetu Patera)	13.68	No
Aramazd Patera	Aramazd (Armenian)	73°35′S336°49′W / 73.58°S 336.81°W / -73.58; -336.81 (Aramazd Patera)	68.82	No
Arusha Patera	Arusha (Hindu)	39°04′S101°29′W / 39.06°S 101.48°W / -39.06; -101.48 (Arusha Patera)	68.07	Yes
Asha Patera	Asha (Zoroastrian)	8°50′S225°41′W / 8.84°S 225.69°W / -8.84; -225.69 (Asha Patera)	108.33	Yes
Asis Patera	Asis (Nandi)	44°20′N91°08′W / 44.33°N 91.14°W / 44.33; -91.14 (Asis Patera)	98.00	Yes
Ātar Patera	Atar (Zoroastrian)	31°06′N278°35′W / 31.1°N 278.58°W / 31.1; -278.58 (Ātar Patera)	86.41	Yes
Aten Patera	Aten (Egyptian)	48°32′S310°01′W / 48.53°S 310.02°W / -48.53; -310.02 (Aten Patera)	43.4	Yes
Babbar Patera	Babbar (Sumerian) [1]	39°47′S271°59′W / 39.79°S 271.98°W / -39.79; -271.98 (Babbar Patera)	85.74	Yes
Balder Patera	Balder (Norse)	11°26′N156°06′W / 11.44°N 156.1°W / 11.44; -156.1 (Balder Patera)	42.0	No
Belenus Patera	Belenus (Celtic)	2°54′N157°43′W / 2.9°N 157.72°W / 2.9; -157.72 (Belenus Patera)	23.01	No
Bochica Patera	Bochica (Muisca)	61°30′S18°51′W / 61.5°S 18.85°W / -61.5; -18.85 (Bochica Patera)	52.38	No
Camaxtli Patera	Camaxtli (Aztec)	15°15′N136°48′W / 15.25°N 136.8°W / 15.25; -136.8 (Camaxtli Patera)	58.39	Yes
Carancho Patera	Carancho (Bolivian)	1°26′N317°12′W / 1.43°N 317.2°W / 1.43; -317.2 (Carancho Patera)	30.04	No
Cataquil Patera	Catequil (Inca)	23°53′S16°34′W / 23.89°S 16.57°W / -23.89; -16.57 (Cataquil Patera)	133.95	No
Catha Patera	Cautha (Etruscan)	53°46′S101°35′W / 53.76°S 101.58°W / -53.76; -101.58 (Catha Patera)	68.59	Yes
Chaac Patera	Chaac (Mayan)	11°53′N157°26′W / 11.88°N 157.44°W / 11.88; -157.44 (Chaac Patera)	95.88	Yes
Chors Patera	Chors (Slavic)	68°28′N249°51′W / 68.47°N 249.85°W / 68.47; -249.85 (Chors Patera)	64.97	Yes
Creidne Patera	Creidhne (Celtic)	53°01′S342°32′W / 53.02°S 342.53°W / -53.02; -342.53 (Creidne Patera)	152.82	Yes
Cuchi Patera	Cuchi (Australian Aboriginal)	0°54′S144°34′W / 0.9°S 144.57°W / -0.9; -144.57 (Cuchi Patera)	76.28	Yes
Culann Patera	Culann (Celtic)	20°13′S160°10′W / 20.22°S 160.17°W / -20.22; -160.17 (Culann Patera)	54.48	Yes
Daedalus Patera	Daedalus (Greek)	19°31′N274°21′W / 19.52°N 274.35°W / 19.52; -274.35 (Daedalus Patera)	73.29	Yes
Dazhbog Patera	Dazhbog (Slavic)	55°06′N301°29′W / 55.1°N 301.48°W / 55.1; -301.48 (Dazhbog Patera)	118.39	Yes
Dingir Patera	Dingir (Sumerian)	4°08′S341°22′W / 4.13°S 341.37°W / -4.13; -341.37 (Dingir Patera)	47.38	No
Dusura Patera	Dusura (Nabataean)	37°28′N119°01′W / 37.47°N 119.02°W / 37.47; -119.02 (Dusura Patera)	68.58	Yes
Ekhi Patera	Ekhi (Basque)	28°21′S88°30′W / 28.35°S 88.5°W / -28.35; -88.5 (Ekhi Patera)	51.04	Yes
Emakong Patera	Emakong (Sulca people of New Britain)	3°20′S119°49′W / 3.33°S 119.82°W / -3.33; -119.82 (Emakong Patera)	80.08	Yes
Estan Patera	Estan (Hittite)	21°37′N87°43′W / 21.61°N 87.71°W / 21.61; -87.71 (Estan Patera)	95.0	Yes
Fo Patera	Fo (Chinese)	40°47′N192°15′W / 40.79°N 192.25°W / 40.79; -192.25 (Fo Patera)	47.15	Yes
Fuchi Patera	Kamuy Fuchi (Ainu)	28°20′N327°34′W / 28.34°N 327.57°W / 28.34; -327.57 (Fuchi Patera)	63.67	Yes
Gabija Patera	Gabija (Lithuanian)	51°54′S202°32′W / 51.9°S 202.53°W / -51.9; -202.53 (Gabija Patera)	48.0	Yes
Galai Patera	Galai (Mongol)	10°52′S288°07′W / 10.87°S 288.11°W / -10.87; -288.11 (Galai Patera)	105.23	No
Gauwa Patera	Gauwa (!Kung)	35°39′N12°11′W / 35.65°N 12.18°W / 35.65; -12.18 (Gauwa Patera)	27.00	Yes
Gibil Patera	Gibil (Sumerian)	14°59′S294°38′W / 14.99°S 294.64°W / -14.99; -294.64 (Gibil Patera)	102.38	Yes?
Girru Patera	Girru (Babylonian)	22°48′N239°55′W / 22.8°N 239.92°W / 22.8; -239.92 (Girru Patera)	68.23	Yes
Gish Bar Patera	Gish Bar (Babylonian)	16°11′N90°16′W / 16.18°N 90.26°W / 16.18; -90.26 (Gish Bar Patera)	122.25	Yes
Grannos Patera	Grannus (Celtic)	11°10′N145°17′W / 11.17°N 145.29°W / 11.17; -145.29 (Grannos Patera)	45.0	No
Grian Patera	Grian (Celtic)	11°50′S11°59′W / 11.84°S 11.98°W / -11.84; -11.98 (Grian Patera)	70.0	Yes
Gurzil Patera	Gurzil (Berber)	50°24′N48°16′W / 50.40°N 48.26°W / 50.40; -48.26 (Gurzil Patera)	51.00	Yes
Haokah Patera	Haokah (Lakota)	20°52′S186°39′W / 20.87°S 186.65°W / -20.87; -186.65 (Haokah Patera)	53.86	Yes
Hatchawa Patera	Hatchawa (Yaroro)	59°25′S31°59′W / 59.42°S 31.99°W / -59.42; -31.99 (Hatchawa Patera)	84.98	No
Heiseb Patera	Heiseb (Bushman)	29°47′N244°51′W / 29.79°N 244.85°W / 29.79; -244.85 (Heiseb Patera)	62.48	No
Heno Patera	Heno (Iroquois)	57°08′S311°28′W / 57.14°S 311.47°W / -57.14; -311.47 (Heno Patera)	71.06	Yes
Hephaestus Patera	Hephaestus (Greek)	1°57′N289°47′W / 1.95°N 289.79°W / 1.95; -289.79 (Hephaestus Patera)	38.84	Yes
Hi'iaka Patera	Hi'iaka (Hawaiian)	3°38′S79°28′W / 3.64°S 79.47°W / -3.64; -79.47 (Hi'iaka Patera)	128.27	Yes
Hiruko Patera	Hiruko (Japanese)	65°05′S328°50′W / 65.09°S 328.83°W / -65.09; -328.83 (Hiruko Patera)	89.54	No
Horus Patera	Horus (Egyptian)	9°49′S338°00′W / 9.82°S 338.0°W / -9.82; -338.0 (Horus Patera)	144.21	No
Huo Shen Patera	Huo Shen (Chinese)	15°01′S328°59′W / 15.01°S 328.98°W / -15.01; -328.98 (Huo Shen Patera)	62.73	No
Ilmarinen Patera	Ilmarinen (Finnish)	14°26′S1°09′W / 14.44°S 1.15°W / -14.44; -1.15 (Ilmarinen Patera)	45.94	No
Inti Patera	Inti (Inca)	68°22′S347°31′W / 68.37°S 347.52°W / -68.37; -347.52 (Inti Patera)	70.91	No
Isum Patera	Isum (Assyrian)	29°49′N208°28′W / 29.82°N 208.46°W / 29.82; -208.46 (Isum Patera)	62.24	Yes
Itzamna Patera	Itzamna (Mayan)	16°08′S99°28′W / 16.13°S 99.46°W / -16.13; -99.46 (Itzamna Patera)	126.36	Yes
Janus Patera	Janus (Roman)	4°34′S39°03′W / 4.56°S 39.05°W / -4.56; -39.05 (Janus Patera)	60.07	Yes
Kami-Nari Patera	Kami-Nari (Japanese)	8°42′S235°05′W / 8.7°S 235.08°W / -8.7; -235.08 (Kami-Nari Patera)	53.39	No
Kane Patera	Kāne (Hawaiian)	48°23′S11°46′W / 48.39°S 11.77°W / -48.39; -11.77 (Kane Patera)	135.77	No
Kanlaon Patera	Kan-Laon (Philippine)	31°04′S337°58′W / 31.06°S 337.96°W / -31.06; -337.96 (Kanlaon Patera)	94.0	Yes
Karei Patera	Karei (Semang people of the Malay Peninsula)	0°12′N13°05′W / 0.2°N 13.08°W / 0.2; -13.08 (Karei Patera)	35.29	Yes
Kava Patera	Kava (mythology) (Persian)	16°50′S341°20′W / 16.83°S 341.33°W / -16.83; -341.33 (Kava Patera)	63.82	No
Khalla Patera	Khalla (Bushman)	5°08′N303°34′W / 5.14°N 303.56°W / 5.14; -303.56 (Khalla Patera)	48.24	No
Kibero Patera	Kibero (Yaroro)	11°50′S305°07′W / 11.83°S 305.11°W / -11.83; -305.11 (Kibero Patera)	63.13	No
Kinich Ahau Patera	Kinich Ahau (Mayan)	49°20′N310°12′W / 49.34°N 310.2°W / 49.34; -310.2 (Kinich Ahau Patera)	45.21	Yes
Kotar Patera	Kothar-wa-Khasis (Ugaritic)	11°11′N61°22′W / 11.18°N 61.37°W / 11.18; -61.37 (Kotar Patera)	67.00	Yes
Kurdalagon Patera	Kurdalagon (Ossetian)	49°37′S217°59′W / 49.61°S 217.99°W / -49.61; -217.99 (Kurdalagon Patera)	28.15	Yes
Laki-oi Patera	Laki-oi (Kayan people of Borneo)	38°56′S61°56′W / 38.94°S 61.93°W / -38.94; -61.93 (Laki-oi Patera)	105.16	No
Llew Patera	Llew (Celtic)	12°10′N242°19′W / 12.16°N 242.31°W / 12.16; -242.31 (Llew Patera)	78.0	Yes
Loki Patera	Loki (Norse)	12°58′N308°48′W / 12.97°N 308.8°W / 12.97; -308.8 (Loki Patera)	227.79	Yes
Lu Huo Patera	Lu Huo (Chinese)	38°31′S353°10′W / 38.52°S 353.17°W / -38.52; -353.17 (Lu Huo Patera)	63.95	No
Maasaw Patera	Masau'u (Hopi)	40°17′S339°05′W / 40.28°S 339.09°W / -40.28; -339.09 (Maasaw Patera)	43.99	No
Mafuike Patera	Mahu-ike (Polynesian)	13°31′S259°28′W / 13.52°S 259.47°W / -13.52; -259.47 (Mafuike Patera)	148.32	No
Malik Patera	Malik (Babylonian and Canaanite)	34°09′S129°35′W / 34.15°S 129.59°W / -34.15; -129.59 (Malik Patera)	121.68	Yes
Mama Patera	Mama (Chibchan people of Central America)	11°17′S355°19′W / 11.28°S 355.31°W / -11.28; -355.31 (Mama Patera)	15.72	No
Mandulis Patera	Mandulis (Kushite)	30°25′S305°31′W / 30.42°S 305.52°W / -30.42; -305.52 (Mandulis Patera)	37.00	Yes
Manua Patera	Manua (Hawaiian)	35°47′N321°44′W / 35.78°N 321.73°W / 35.78; -321.73 (Manua Patera)	110.51	Yes
Masaya Patera	Masaya (Nicaraguan)	22°37′S344°29′W / 22.62°S 344.49°W / -22.62; -344.49 (Masaya Patera)	55.09	No
Maui Patera	Māui (Hawaiian)	16°37′N124°15′W / 16.61°N 124.25°W / 16.61; -124.25 (Maui Patera)	37.84	Yes
Mazda Paterae	Ahura Mazda (Zoroastrian)	8°49′S313°17′W / 8.81°S 313.28°W / -8.81; -313.28 (Mazda Paterae)	240.78	Yes
Mbali Patera	Mbali (Pygmy)	31°30′S5°04′W / 31.5°S 5.06°W / -31.5; -5.06 (Mbali Patera)	40.7	Yes
Menahka Patera	Menahka (Mandan) people of North America)	31°19′S344°45′W / 31.31°S 344.75°W / -31.31; -344.75 (Menahka Patera)	9.15	No
Mentu Patera	Mentu (Egyptian)	7°00′N139°22′W / 7.0°N 139.36°W / 7.0; -139.36 (Mentu Patera)	103.0	No
Michabo Patera	Michabo (Algonquian peoples of North America)	1°12′N167°36′W / 1.2°N 167.6°W / 1.2; -167.6 (Michabo Patera)	104.0	Yes
Mihr Patera	Mihr (Armenian)	16°31′S305°27′W / 16.51°S 305.45°W / -16.51; -305.45 (Mihr Patera)	61.72	Yes
Mithra Patera	Mithra (Zoroastrian)	59°00′S266°28′W / 59.0°S 266.46°W / -59.0; -266.46 (Mithra Patera)	33.78	Yes
Monan Patera	a god of the Tupí-Guaraní (Brazil) [3]	19°43′N105°23′W / 19.72°N 105.39°W / 19.72; -105.39 (Monan Patera)	112.89	Yes
Mulungu Patera	Mulungu (East African)	17°16′N217°52′W / 17.26°N 217.87°W / 17.26; -217.87 (Mulungu Patera)	62.48	Yes
Namarrkun Patera	Namarrkun (Australian Aboriginal)	10°04′N175°31′W / 10.06°N 175.52°W / 10.06; -175.52 (Namarrkun Patera)	16.69	No
Nina Patera	Nina (Inca)	38°14′S162°36′W / 38.24°S 162.6°W / -38.24; -162.6 (Nina Patera)	52.07	No
Nunurta Patera	Ninurta (Sumerian and Akkadian)	16°44′S315°15′W / 16.74°S 315.25°W / -16.74; -315.25 (Nunurta Patera)	82.34	No
Nusku Patera	Nusku (Assyrian)	65°01′S3°49′W / 65.01°S 3.82°W / -65.01; -3.82 (Nusku Patera)	124.31	Yes
Nyambe Patera	Nyambe (Zambezi)	0°23′N343°07′W / 0.38°N 343.11°W / 0.38; -343.11 (Nyambe Patera)	58.15	No
Odqan Patera	Odqan (Mongol)	42°20′S174°22′W / 42.33°S 174.36°W / -42.33; -174.36 (Odqan Patera)	86	Yes
Olafat Patera	Olafat (Caroline Islands)	62°40′S244°23′W / 62.66°S 244.39°W / -62.66; -244.39 (Olafat Patera)	119	Yes
Ot Patera	Ot Ene (Mongol)	1°06′N217°24′W / 1.1°N 217.4°W / 1.1; -217.4 (Ot Patera)	52.26	Yes
Päive Patera	Päive (Sami)	45°43′S358°32′W / 45.71°S 358.54°W / -45.71; -358.54 (Päive Patera)	59.05	No
Päive Patera	Päive (Sami)	45°43′S358°32′W / 45.71°S 358.54°W / -45.71; -358.54 (Päive Patera)	59.05	Yes
Pajonn Patera	Pajonn (Sami)	45°43′S358°32′W / 45.71°S 358.54°W / -45.71; -358.54 (Päive Patera)	59.05	Yes
Pautiwa Patera	Pautiwa (Hopi)	34°12′S345°35′W / 34.2°S 345.59°W / -34.2; -345.59 (Pautiwa Patera)	6.62	No
Pillan Patera	Pillan (Mapuche people of South America)	12°20′S243°15′W / 12.34°S 243.25°W / -12.34; -243.25 (Pillan Patera)	73.43	Yes
Podja Patera	Podja (Evenk people of Russia and China)	18°25′S304°44′W / 18.41°S 304.74°W / -18.41; -304.74 (Podja Patera)	67.03	No
Prometheus Patera	Prometheus (Greek)	0°37′S152°27′W / 0.62°S 152.45°W / -0.62; -152.45 (Prometheus Patera)	73.43	Yes
Purgine Patera	Purgine (Mordvin people of Russia)	2°37′S297°18′W / 2.61°S 297.3°W / -2.61; -297.3 (Purgine Patera)	35.74	No
Pyerun Patera	Perun (Slavic)	55°38′S251°13′W / 55.64°S 251.21°W / -55.64; -251.21 (Pyerun Patera)	52.18	Yes
Ra Patera	Ra (Egyptian)	8°40′S324°42′W / 8.66°S 324.7°W / -8.66; -324.7 (Ra Patera)	39.11	Yes
Radegast Patera	Radegast (Slavic)	27°47′S159°59′W / 27.78°S 159.98°W / -27.78; -159.98 (Radegast Patera)	27.11	Yes
Rarog Patera	Rarog (Slavic)	41°43′S304°25′W / 41.71°S 304.41°W / -41.71; -304.41 (Rarog Patera)	104.35	Yes
Rata Patera	Rātā (Māori)	35°37′S199°47′W / 35.61°S 199.78°W / -35.61; -199.78 (Rata Patera)	46.31	Yes
Reiden Patera	Reiden (Japanese)	13°24′S235°27′W / 13.4°S 235.45°W / -13.4; -235.45 (Reiden Patera)	73.26	Yes
Reshef Patera	Reshef (Phoenician)	27°41′N158°04′W / 27.69°N 158.06°W / 27.69; -158.06 (Reshef Patera)	62.0	No
Reshet Paterae	Reshet (Aramaic)	0°32′S305°29′W / 0.53°S 305.48°W / -0.53; -305.48 (Reshet Paterae)	148.34	No
Ruaumoko Patera	Ruaumoko (Māori)	14°43′N139°44′W / 14.72°N 139.74°W / 14.72; -139.74 (Ruaumoko Patera)	19.0	Yes
Ruwa Patera	Ruwa (East African)	0°11′N1°45′W / 0.19°N 1.75°W / 0.19; -1.75 (Ruwa Patera)	62.44	Yes
Savitr Patera	Savitr (Hindu)	48°11′N123°22′W / 48.19°N 123.36°W / 48.19; -123.36 (Savitr Patera)	92.48	No
Sêd Patera	Sêd (Phoenician)	2°55′S303°34′W / 2.91°S 303.57°W / -2.91; -303.57 (Sêd Patera)	52.1	No
Sengen Patera	Sengen (Japanese)	32°53′S303°44′W / 32.89°S 303.73°W / -32.89; -303.73 (Sengen Patera)	63.64	Yes
Seth Patera	Seth (Egyptian)	5°21′S131°40′W / 5.35°S 131.67°W / -5.35; -131.67 (Seth Patera)	59.82	Yes
Sethlaus Patera	Sethlans (Etruscan)	52°17′S193°50′W / 52.29°S 193.83°W / -52.29; -193.83 (Sethlaus Patera)	78.57	Yes
Shakuru Patera	Shakuru (Pawnee people of North America)	24°07′S265°44′W / 24.12°S 265.74°W / -24.12; -265.74 (Shakuru Patera)	105.01	Yes
Shamash Patera	Shamash (Babylonian and Assyrian)	34°59′S152°35′W / 34.99°S 152.59°W / -34.99; -152.59 (Shamash Patera)	205.3	Yes
Shamshu Patera	Shamshu (Arabian)	10°04′S62°58′W / 10.07°S 62.97°W / -10.07; -62.97 (Shamshu Patera)	96.36	Yes
Shango Patera	Shango (Yorùbá)	32°21′N100°31′W / 32.35°N 100.52°W / 32.35; -100.52 (Shango Patera)	90.22	Yes [4]
Shoshu Patera	Shoshu (Caucasian)	20°22′S324°40′W / 20.36°S 324.67°W / -20.36; -324.67 (Shoshu Patera)	13.08	No
Shurdi Patera	Shurdh (Albanian)	38°28′S290°44′W / 38.47°S 290.74°W / -38.47; -290.74 (Shurdi Patera)	13.08	Yes
Sigurd Patera	Sigurd (Norse)	5°56′S97°56′W / 5.94°S 97.93°W / -5.94; -97.93 (Sigurd Patera)	68.6	Yes
Siun Patera	Siun (Nanai people of Siberia)	49°50′S0°26′W / 49.84°S 0.44°W / -49.84; -0.44 (Siun Patera)	52.5	No
Steropes Patera	Steropes (Greek)	15°32′N138°51′W / 15.54°N 138.85°W / 15.54; -138.85 (Siun Patera)	20.0	No
Sui Jen Patera	Sui Jen (Chinese)	19°06′S2°39′W / 19.1°S 2.65°W / -19.1; -2.65 (Sui Jen Patera)	33.78	No
Surya Patera	Surya (Hindu)	21°28′S151°35′W / 21.47°S 151.59°W / -21.47; -151.59 (Surya Patera)	49.81	Yes
Susanoo Patera	Susanoo (Japanese)	22°23′N219°48′W / 22.39°N 219.8°W / 22.39; -219.8 (Susanoo Patera)	58.41	Yes
Svarog Patera	Svarog (Slavic)	48°40′S265°44′W / 48.66°S 265.74°W / -48.66; -265.74 (Svarog Patera)	124.03	Yes
Tabiti Patera	Tabiti (Scythian)	6°45′S275°54′W / 6.75°S 275.90°W / -6.75; -275.90 (Tabiti Patera)	103	Yes
Talos Patera	Talos (Greek)	26°23′S354°45′W / 26.39°S 354.75°W / -26.39; -354.75 (Talos Patera)	24.67	No
Taranis Patera	Taranis (Celtic)	71°22′S25°32′W / 71.37°S 25.53°W / -71.37; -25.53 (Taranis Patera)	130.67	No
Taw Patera	Taw (Monguor)	33°39′S358°22′W / 33.65°S 358.37°W / -33.65; -358.37 (Taw Patera)	4.74	No
Tawhaki Patera	Tawhaki (Maori)	3°19′N76°11′W / 3.32°N 76.18°W / 3.32; -76.18 (Tawhaki Patera)	49.85	Yes
Thomagata Patera	Thomagata (Muisca)	25°40′N165°56′W / 25.67°N 165.94°W / 25.67; -165.94 (Thomagata Patera)	59.0	No
Tien Mu Patera	Tien Mu (Chinese)	12°19′N134°18′W / 12.31°N 134.3°W / 12.31; -134.3 (Tawhaki Patera)	28.0	Yes
Tiermes Patera	Tiermes (Sami)	22°23′N349°57′W / 22.38°N 349.95°W / 22.38; -349.95 (Tiermes Patera)	79.76	Yes
Tiwaz Patera	Tiwaz (Luwian)	70°26′S279°45′W / 70.44°S 279.75°W / -70.44; -279.75 (Tiwaz Patera)	78	Yes
Tohil Patera	Tohil (Mayan)	25°38′S158°40′W / 25.63°S 158.66°W / -25.63; -158.66 (Tohil Patera)	76.59	No
Tol-Ava Patera	Tol-Ava (Mordvin people of Russia)	1°48′N322°08′W / 1.8°N 322.14°W / 1.8; -322.14 (Tol-Ava Patera)	84.53	No
Tung Yo Patera	Tung Yo (Chinese)	18°16′S0°56′W / 18.27°S 0.93°W / -18.27; -0.93 (Tung Yo Patera)	59.68	No
Tupan Patera	the thunder god Tupan of the Tupí-Guaraní people of Brazil [5]	18°44′S141°08′W / 18.73°S 141.13°W / -18.73; -141.13 (Tupan Patera)	79.13	Yes
Tvashtar Paterae	Tvashtri (Hindu)	62°46′N123°32′W / 62.76°N 123.53°W / 62.76; -123.53 (Tvashtar Paterae)	306.19	Yes
Ukko Patera	Ukko (Finnish)	30°57′N18°25′W / 30.95°N 18.41°W / 30.95; -18.41 (Ukko Patera)	35.25	Yes [4]
Ülgen Patera	Ülgen (Siberian)	40°51′S287°19′W / 40.85°S 287.31°W / -40.85; -287.31 (Ülgen Patera)	43.89	Yes
Uta Patera	Utu (Sumerian)	35°52′S22°24′W / 35.86°S 22.4°W / -35.86; -22.4 (Uta Patera)	43.89	Yes
Vahagn Patera	Vahagn (Armenian)	24°07′S350°45′W / 24.11°S 350.75°W / -24.11; -350.75 (Vahagn Patera)	99.6	No
Verbti Patera	Verbt (Albanian)	37°59′N87°55′W / 37.99°N 87.92°W / 37.99; -87.92 (Verbti Patera)	62.00	Yes
Viracocha Patera	Viracocha (Inca)	61°46′S280°05′W / 61.77°S 280.09°W / -61.77; -280.09 (Viracocha Patera)	59.3	Yes
Vivasvant Patera	Vivasvant (Hindu)	75°08′N293°59′W / 75.14°N 293.98°W / 75.14; -293.98 (Vivasvant Patera)	83.19	Yes
Wabasso Patera	Wabasso (Potawatomi people of North America)	22°54′S166°42′W / 22.9°S 166.7°W / -22.9; -166.7 (Wabasso Patera)	32.0	No
Wanajo Patera	Wanajo (Louisiade Archipelago)	58°45′S178°52′W / 58.75°S 178.87°W / -58.75; -178.87 (Wanajo Patera)	24.0	Yes
Wayland Patera	Wayland the Smith (Germanic)	32°48′S225°14′W / 32.8°S 225.23°W / -32.8; -225.23 (Wayland Patera)	63.37	Yes
Yaw Patera	Yaw (Hebrew)	9°54′N132°12′W / 9.9°N 132.2°W / 9.9; -132.2 (Yaw Patera)	39.0	Yes
Yeloje Patera	Yeloje (Yukaghir)	20°06′N132°24′W / 20.10°N 132.40°W / 20.10; -132.40 (Yeloje Patera)	107.00	Yes
Zal Patera	Zal (Persian)	40°15′N74°30′W / 40.25°N 74.5°W / 40.25; -74.5 (Zal Patera)	165.94	Yes

Lava flows

Ionian fluctūs (areas of lava flow) 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. ^[1] 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. ^[2]

Fluctus	Named after	Coordinates	Length	Activity Observed
Acala Fluctus	Acala (Buddhism)	8°58′N334°35′W / 8.97°N 334.59°W / 8.97; -334.59 (Acala Fluctus)	411.11 km	Yes
Arinna Fluctus	Arinna (Hittite)	31°14′N149°10′W / 31.24°N 149.16°W / 31.24; -149.16 (Arinna Fluctus)	121.94 km	Yes
Donar Fluctus	Donar (Germanic)	22°40′N187°38′W / 22.67°N 187.63°W / 22.67; -187.63 (Donar Fluctus)	222.47 km	Yes
Euboea Fluctūs	Euboea (Greek)	45°01′S350°58′W / 45.01°S 350.96°W / -45.01; -350.96 (Euboea Fluctūs)	104.82 km	No
Fjorgynn Fluctus	Fjorgyn (Norse)	11°14′N358°05′W / 11.23°N 358.08°W / 11.23; -358.08 (Fjorgynn Fluctus)	414.07 km	Yes
Kanehekili Fluctus	Kāne Milohai (Hawaiian)	17°41′S33°34′W / 17.68°S 33.56°W / -17.68; -33.56 (Kanehekili Fluctus)	243.47 km	Yes
Lei-Kung Fluctus	Lei Gong (Chinese)	40°24′N206°28′W / 40.4°N 206.47°W / 40.4; -206.47 (Lei-Kung Fluctus)	386.17 km	Yes
Lei-zi Fluctus	Leizi (Chinese)	14°15′N46°10′W / 14.25°N 46.16°W / 14.25; -46.16 (Lei-zi Fluctus)	361.1 km	No
Marduk Fluctus	Marduk (Sumerian)	27°35′S210°50′W / 27.59°S 210.83°W / -27.59; -210.83 (Marduk Fluctus)	169.43 km	Yes
Masubi Fluctus	Ho-Masubi (Japanese)	50°29′S58°08′W / 50.49°S 58.13°W / -50.49; -58.13 (Masubi Fluctus)	501.33 km	Yes
Mixcoatl Fluctus	Mixcoatl (Aztec)	46°19′S141°09′W / 46.32°S 141.15°W / -46.32; -141.15 (Mixcoatl Fluctus)	246.0 km	Yes
Quzah Fluctūs	Quzah (Arabian)	31°46′S311°34′W / 31.76°S 311.57°W / -31.76; -311.57 (Quzah Fluctūs)	189.0 km	Yes
Sobo Fluctus	Sobo (Vodou)	14°05′N150°35′W / 14.08°N 150.59°W / 14.08; -150.59 (Sobo Fluctus)	58.83 km	Yes
Tsũi Goab Fluctus	Tsui (Khoikhoi)	1°24′S163°24′W / 1.4°S 163.4°W / -1.4; -163.4 (Tsũi Goab Fluctus)	117.0 km	Yes
Tung Yo Fluctus	Tung Yo (Chinese)	16°36′S356°29′W / 16.6°S 356.49°W / -16.6; -356.49 (Tung Yo Fluctus)	459.37 km	No
Upulevo Fluctus	Upulevo (Timorese)	79°53′S314°55′W / 79.88°S 314.92°W / -79.88; -314.92 (Upulevo Fluctus)	113.0 km	Yes
Uta Fluctus	Utu (Sumerian)	33°03′S16°39′W / 33.05°S 16.65°W / -33.05; -16.65 (Uta Fluctus)	332.31 km	No

Shield volcanoes

Ionian shield volcanoes or tholi are named after mythological figures associated with fire or with the nymph Io.

Tholus	Named after	Coordinates	Length	Height
Apis Tholus	Apis (Greek)	10°54′S347°53′W / 10.9°S 347.88°W / -10.9; -347.88 (Apis Tholus)	145.71 km	N/A
Inachus Tholus	Inachus (Greek)	16°11′S347°46′W / 16.18°S 347.76°W / -16.18; -347.76 (Inachus Tholus)	176.96 km	1.8 km [6]
Tsũi Goab Tholus	Tsui (Khoikhoi)	0°06′S163°00′W / 0.1°S 163.0°W / -0.1; -163.0 (Tsũi Goab Tholus)	53.0 km	0.8 km [7]

Lava channels

Ionian lava channels that cut into the surrounding terrain use the term vallis.

Vallis	Named after	Coordinates	Length
Tawhaki Vallis	Tawhaki (Maori)	0°30′N72°48′W / 0.5°N 72.8°W / 0.5; -72.8 (Tawhaki Vallis)	190.0 kilometer (km)

References

1. Blue, Jennifer. "Io Nomenclature: Patera, paterae". USGS. Retrieved 2010-01-17.
2. Davies, Ashley (2007). "Appendix 1: Io hot-spot locations". Volcanism on Io: A Comparison with Earth. Cambridge University Press. pp. 305–309. ISBN   978-0-521-85003-2.
3. /moʊˈnæn/ in English by Rosaly Lopes, who named Monan.
4. Spencer, J. R.; et al. (2007). "Io Volcanism Seen by New Horizons: A Major Eruption of the Tvashtar Volcano". Science. 318 (5848): 240–243. Bibcode:2007Sci...318..240S. doi:10.1126/science.1147621. PMID   17932290.
5. /tuːˈpæn/ in English by Rosaly Lopes, who named Tupan.
6. Schenk, P.; et al. (2001). "The Mountains of Io: Global and Geological Perspectives from Voyager and Galileo". Journal of Geophysical Research. 106 (E12): 33201–33222. Bibcode:2001JGR...10633201S. doi: 10.1029/2000JE001408 .
7. Schenk, P. M.; et al. (2004). "Shield volcano topography and the rheology of lava flows on Io". Icarus. 169 (1): 98–110. Bibcode:2004Icar..169...98S. doi:10.1016/j.icarus.2004.01.015.

• USGS Planetary Nomenclature: Io