active, confirmed

Below is the subset of Vent Fields that contain the taxonomy term (Activity, Tectonic Setting, Region, Ocean, National Jurisdiction, Temperature Category, or MGDS Feature ID) listed above.
You can sort the list below by clicking on a column header.

Vent Field Name ID	Activity	Tectonic Setting	Region	Latitude	Longitude	Maximum or Single Reported Depth	Year and How Discovered
Zouyu ridge	active, confirmed	mid-ocean ridge	S MAR	-13.2800	-14.4100	2315	2009 towed video
Yoron Hole	active, confirmed	back-arc spreading center	Okinawa Trough	27.4916	127.5333	590	2010 ROV Hyperdolphin
Yokosuka	active, confirmed	back-arc spreading center	Okinawa Trough	25.2638	124.3733	2190	2016 ROV Kaiko; 2014 plume only
Yali	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	36.6600	27.1300	3	1991 or earlier, from beach
Wright volcanic center	active, confirmed	arc volcano	Kermadec Arc	-31.8500	-179.1880	1165	2005 submersible PISCES V; 2004 plume NZAPLUME III cruise
White Point, Palos Verde, California	active, confirmed	other	Coastal California	33.7000	-118.3167	10	1984 or earlier, likely by SCUBA
White Lady	active, confirmed	back-arc spreading center	North Fiji Basin	-16.9833	173.9167	2000	1988 towed camera and plume; 1989 submersible Nautile
White Island	active, confirmed	back-arc spreading center	Taupo Volcanic Zone	-37.5191	177.1953	30	1989 or earlier, likely SCUBA
White Church	active, confirmed	back-arc spreading center	Lau Basin	-21.9612	-176.5234	1960	1989 submersible Nautile; 2004 plume survey
Whale Island	active, confirmed	back-arc spreading center	Taupo Volcanic Zone	-37.8600	176.9800	42	1990 or earlier, likely by SCUBA
West Rota volcano	active, confirmed	arc volcano	Mariana Arc	14.3250	144.8330	1150	2005 ROV Hyper-Dolphin; 2003 plume only; 2004 ROV ROPOS did not observe venting
West Mata submarine volcano	active, confirmed	arc volcano	Tonga Arc	-15.0950	-173.7500	1208	2009 ROV Jason II; 2008 eruption plume detected
Vulkanolog	active, confirmed	arc volcano	Kermadec Arc	-30.6870	-178.4530	130	1979 and 1998 (need to check references); 2002 plume not detected NZAPLUME II
Vulcano	active, confirmed	arc volcano	Aeolian Arc, Tyrrhenian Sea	38.4000	15.0000	8	1960's shallow vents
Von Damm	active, confirmed	mid-ocean ridge	Mid-Cayman Rise	18.3777	-81.7972	2372	2010 AUV Autosub6000 and HyBIS TVG; 2009 plume only
Vienna Woods, Hydrothermal Field 4	active, confirmed	back-arc spreading center	Manus Basin	-3.3712	150.0360	2240	1990 TV-grab
Vienna Woods	active, confirmed	back-arc spreading center	Manus Basin	-3.1667	150.2833	2500	1990 TV-grab (also same year, sampled by submersible Mir); 1985 (or 1986) camera tow vent fauna and inactive chimneys
Vailulu'u Seamount	active, confirmed	intra-plate volcano	Central Pacific	-14.2167	-169.0667	1000	2005 submersible Pisces V; 2000 plume only
Vai Lili	active, confirmed	back-arc spreading center	Lau Basin	-22.2151	-176.6083	1764	1989 submersible Nautile
Uka Pacha	active, confirmed	mid-ocean ridge	Galapagos Rift	0.7700	-88.3000	2100	2011 ROV Little Hercules
Tutum Bay, Ambitle Island	active, confirmed	arc volcano	Tabar-Feni Arc	-4.0833	153.5500	10	1996 or earlier, likely by SCUBA
Tu'i Malila	active, confirmed	back-arc spreading center	Lau Basin	-21.9876	-176.5678	1870	2005 ROV Jason II; 2004 plume only
Troll Wall	active, confirmed	mid-ocean ridge	Mohns Ridge	71.2833	-5.7667	550	2005 ROV BIODEEP-05 cruise
Tow Cam	active, confirmed	back-arc spreading center	Lau Basin	-20.3169	-176.1367	2700	2004 AUV ABE; 2004 plume only on previous cruise
TOTO Caldera	active, confirmed	arc volcano	Mariana Arc	12.7167	143.5333	2960	2000 deep-tow camera (later, same year - ROV Kaiko); 1998 or earlier hydrothermal deposits dredged; 1998 plume only
Tonga Arc, Volcano 19	active, confirmed	arc volcano	Tonga Arc	-24.8000	-177.0167	970	2005 with submersibles PISCES IV and PISCES V and ROV RCV-150; 2003 plume and dredge only
Tonga Arc, Volcano 18	active, confirmed	arc volcano	Tonga Arc	-24.5850	-176.9170	1465	2011 ROV MAGNUM; 2003 plume and dredge only
Tonga Arc, Volcano 1	active, confirmed	arc volcano	Tonga Arc	-21.1500	-175.7500	210	2005 with submersibles PISCES IV and PISCES V and ROV RCV-150; 2003 plume and dredge only
Tiancheng	active, confirmed	mid-ocean ridge	SWIR	-27.9670	63.5500	3600	2014 HOV Jiaolong; 1997 plume only; 2009 DY115-20 Leg 7 plume and deposits;
Teotihuacan	active, confirmed	mid-ocean ridge	N EPR	15.7333	-105.4333	2300	2010 submersible Nautile; 1997 plume only
Tempus Fugit	active, confirmed	mid-ocean ridge	Galapagos Rift	0.7683	-85.9100	2560	2011 ROV Little Hercules
Temakons	active, confirmed	back-arc spreading center	New Hebrides back-arc	-17.5667	169.1000	1400	1994 towed camera with temperature
TELVE	active, confirmed	back-arc spreading center	Lau Basin	-22.1667	-176.6040	1760	2008 commercial ROV; 2003 plume only
Teahitia seamount	active, confirmed	intra-plate volcano	Central Pacific	-17.5670	-148.8167	1460	1983 submersible Cyana
Tarama Knoll	active, confirmed	back-arc spreading center	Okinawa Trough	25.0916	124.5416	1990	2009 ROV HyperDolphin
Tangaroa volcano	active, confirmed	arc volcano	Kermadec Arc	-36.3250	178.0333	890	2012 likely towed video or TV grab; 1999 plume only
Taketomi Thermal Area	active, confirmed	arc volcano	Ryukyu Arc	24.3483	124.1017	23	1987 or earlier, likely by SCUBA
Tahi Moana 2	active, confirmed	back-arc spreading center	Lau Basin	-21.9200	-176.5330	1870	1989 submersible Nautile (need reference to check if activity confirmed); 2004 plume only; 2008 commercial ROV (report does not confirm activity)
Tahi Moana 1	active, confirmed	back-arc spreading center	Lau Basin	-20.6900	-176.1800	2256	2008 commercial ROV; 2004 plume only
TAG	active, confirmed	mid-ocean ridge	N MAR	26.1367	-44.8267	3670	1985 towed camera and temperature anomaly; 1986 submersible Alvin
Tafu	active, confirmed	back-arc spreading center	Lau Basin	-15.3833	-174.2500	1400	2008 or 2009 commercial ROV; 2008 plume only; 2009 ROV Jason II
SuSu Knolls	active, confirmed	back-arc spreading center	Manus Basin	-3.8000	152.1000	1520	1996 towed camera/video; 1993 plume only
Sumisu Caldera	active, confirmed	arc volcano	Izu-Bonin Arc	31.4667	140.0667	690	1998 submersible Shinkai 2000
Suiyo Seamount	active, confirmed	arc volcano	Izu-Bonin Arc	28.5750	140.6417	1380	1991 submersible Shinkai 2000
Steinaholl Vent Field	active, confirmed	mid-ocean ridge	Reykjanes Ridge	63.1000	-24.5333	350	1990 plume, echosounding, and towed video; 1993 plume only (included echosounding for more precise location)
Stealth	active, confirmed	mid-ocean ridge	S EPR	-17.6167	-113.2330	2600	1996 Argo II towed video; 1993 plume only; 1998 submersible Alvin
Starfish Seamount, Tinakula	active, confirmed	back-arc spreading center	New Hebrides back-arc	-12.2028	167.6139	1204	2011 commercial ROV; 1989 plume only; 1989 towed camera survey did not confirm activity; 2002 plume and dredge only
Stanton Seamount	active, confirmed	arc volcano	New Hebrides Arc	-10.8670	166.7000	800	2002 towed video
SPOT, Yonaguni Knoll IV	active, confirmed	back-arc spreading center	Okinawa Trough	24.8490	122.7000	1385	2000 submersibles Shinkai 2000 and Shinkai 6500
SPOT, Hatoma Knoll	active, confirmed	back-arc spreading center	Okinawa Trough	24.8550	123.8410	1520	1999 submersible Shinkai 2000
South Cleft	active, confirmed	mid-ocean ridge	JdF Ridge	44.6667	-130.3667	2250	1981 deep-tow photographs; 1984 submersible Alvin
Source	active, confirmed	mid-ocean ridge	JdF Ridge	46.1550	-129.8100	2055	1993 submersible Alvin
Soria Moria	active, confirmed	mid-ocean ridge	Mohns Ridge	71.2593	-5.8146	750	2005 ROV BIODEEP-05 cruise
Sonne 99	active, confirmed	back-arc spreading center	North Fiji Basin	-16.9500	173.9167	1980	1995 deep tow video and TV-grab
Solwara 17	active, confirmed	back-arc spreading center	Manus Basin	-3.0380	147.5280	535	2009 commercial ROV Fugro FV300; 2008 plumes with some sites subsequently observed with ROV
Solwara 13	active, confirmed	back-arc spreading center	Manus Basin	-3.7320	151.7465	2000	2009 commercial ROV Fugro FV300; 1993 plume only
Solwara 11	active, confirmed	back-arc spreading center	Manus Basin	-3.1667	147.1917	1500	2008 commercial ROV; 2000 submersible Nautile did not confirm activity
Solitaire Field	active, confirmed	mid-ocean ridge	CIR	-19.5450	65.8500	2630	2009 submersible Shinkai 6500; 2006 plume only
Snake Pit	active, confirmed	mid-ocean ridge	N MAR	23.3683	-44.9500	3500	1985 real-time TV and imaging sonar; earlier in 1985 seafloor photographs did not confirm activity
Snail	active, confirmed	back-arc spreading center	Mariana Trough	12.9533	143.6200	2880	2003 ROV Jason II; 2003 plume only
Si'iSi'i	active, confirmed	back-arc spreading center	Lau Basin	-22.2900	-176.6290	1950	2008 commercial ROV; 2003 plume only
Semyenov-2	active, confirmed	mid-ocean ridge	N MAR	13.5137	-44.9630	2440	2009 TV grab and photo-TV profiling; 2007 deposits only
Seamount X	active, confirmed	arc volcano	Mariana Arc	13.2500	144.0200	1450	1994 or earlier submersible Shinkai 6500
Sea Cliff	active, confirmed	mid-ocean ridge	Gorda Ridge	42.7550	-126.7083	2800	1988 submersible Sea Cliff; 1985 plume only; 1986 dredge and camera tow did not confirm activity
Sasquatch Field	active, confirmed	mid-ocean ridge	JdF Ridge	47.9969	-129.0662	2200	2000 submersible Alvin
Santorini	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	36.4333	25.4000	400	1960's, likely by SCUBA; 2006 deeper vents HOV Thetis and AUV SeaBED
Sangeang Island	active, confirmed	arc volcano	Banda/Sunda Arc	-8.1300	119.0900	2	1991 or earlier, from beach
Salty Dawg Field	active, confirmed	mid-ocean ridge	JdF Ridge	47.9822	-129.0756	2200	1995 submersible Alvin, followed by ROV ROPOS
Saldanha	active, confirmed	mid-ocean ridge	N MAR	36.5667	-33.4333	2300	1998 submersible Nautile
Sakai	active, confirmed	back-arc spreading center	Okinawa Trough	27.5481	126.9895	1600	1988 submersible Shinkai 2000; 1987 plume only
Saguaro Field	active, confirmed	mid-ocean ridge	S EPR	-31.8500	-112.0333	2330	1999 submersible Alvin; 1998 plume only
Rumble V volcano	active, confirmed	arc volcano	Kermadec Arc	-36.1333	178.1833	755	2001 towed camera; 1999 plume and dredged mussel shells
Rumble III volcano	active, confirmed	arc volcano	Kermadec Arc	-35.7333	178.4667	380	2000 towed camera; 1999 plume only
Ruby	active, confirmed	arc volcano	Mariana Arc	15.6200	145.5700	214	2006 ROV Jason II; 2003 plume only
Rose Garden	active, confirmed	mid-ocean ridge	Galapagos Rift	0.8058	-86.2267	2550	1977 submersible Alvin; 1976 plume and photographs of clam shells did not confirm activity (note: Rose Garden is used here as the name of the vent field, but Rose Garden vent site itself not discovered until 1979)
Ringvent	active, confirmed	mid-ocean ridge	Gulf of California	27.5083	-111.6792	1740	2016 submersible Alvin; 2009 towed camera/CTD/bottles
Ribeira Quente	active, confirmed	mid-ocean ridge	Terceira Rift	37.7250	-25.3160	10	1986 or earlier, likely from shore or by SCUBA
Rehu-Marka	active, confirmed	mid-ocean ridge	S EPR	-17.4333	-113.2000	2590	1993 submersible Nautile; 1984 submersible Cyana - Auzende et al. (1996) says that no active black smokers were discovered but Krasnov et al. (1997) says one black smoker observed
Red Seamount	active, confirmed	mid-ocean ridge	N EPR	20.8033	-109.3783	2000	1982 submersible Alvin
Rapa Nui	active, confirmed	mid-ocean ridge	S EPR	-21.5620	-114.3000	2845	1999 submersible Alvin; 1987-1988 deposits only
Rainbow	active, confirmed	mid-ocean ridge	N MAR	36.2300	-33.9020	2320	1997 submersible Nautile
Punta Mita, Bahia de Banderas	active, confirmed	other	Coastal Mexico	20.7700	-105.5200	10	1997 photo/video most likely by SCUBA
Punta Banda	active, confirmed	other	Coastal Baja California	31.7500	-116.7500	30	1960's commercial abalone divers
Pulau Weh	active, confirmed	arc volcano	Banda/Sunda Arc	5.8166	95.3000	8	1982 or earlier, likely by SCUBA
Prony Bay	active, confirmed	other		-22.3333	166.8333	50	1979 or earlier, likely SCUBA
Precious Stone Mountain	active, confirmed	mid-ocean ridge	Galapagos Rift	1.2200	-101.4900	1700	2009 deep-tow video and TV grab
Pito Seamount	active, confirmed	mid-ocean ridge	S EPR	-23.3275	-111.6402	2270	1993 submersible Nautile
Pika	active, confirmed	back-arc spreading center	Mariana Trough	12.9183	143.6483	2990	2003 submersible Shinkai 6500; 2003 plume only
Piip Submarine Volcano	active, confirmed	arc volcano	Aleutian Arc, western	55.4167	167.2717	500	1990 Mir submersible; 1981 R/V "Vulcanolog" cruise; 1987 (or 1986) echo-sounder fluid discharge
Pescadero Basin, Auka	active, confirmed	mid-ocean ridge	Gulf of California	23.9567	-108.8618	3685	2015 ROV Doc Ricketts; 1990 or earlier plume only
Perseverance	active, confirmed	back-arc spreading center	Mariana Trough	15.4802	144.5077	3935	2016 ROV SuBastian; 2015 AUV Sentry plume mapping
Pegasus	active, confirmed	mid-ocean ridge	Galapagos Rift	0.7500	-88.2000	2000	2011 ROV Little Hercules
Panarea	active, confirmed	arc volcano	Aeolian Arc, Tyrrhenian Sea	38.6583	15.1000	200	1800's shallow vents; 1995 deeper vents ROV Comex
Palinuro	active, confirmed	arc volcano	Aeolian Arc, Tyrrhenian Sea	39.5500	14.7000	1000	2006 ROV Cherokee; 1968 manganese crust only; 1984 deposits only; 1993 TV profile did not confirm
PACMANUS field	active, confirmed	back-arc spreading center	Manus Basin	-3.7250	151.6700	1800	1991 deep-tow camera and video; 1995 submersible Shinkai 6500
Omuro Hole	active, confirmed	arc volcano	Izu-Bonin Arc	34.5467	139.4417	200	2012 ROV Hyper-Dolphin
Not Dead Yet	active, confirmed	mid-ocean ridge	JdF Ridge	46.6899	-129.3772	2419	2007 ROV Jason II; 1991 camera tow did not confirm activity
Northwest Rota-1 volcano	active, confirmed	arc volcano	Mariana Arc	14.6010	144.7750	599	2004 ROV ROPOS; 2003 plume only
Northwest Eifuku	active, confirmed	arc volcano	Mariana Arc	21.4850	144.0430	1604	2004 ROV ROPOS; 2003 plume only
North Knoll, Iheya Ridge	active, confirmed	back-arc spreading center	Okinawa Trough	27.7908	126.8966	1100	1995 deep tow survey
North Cleft, low temperature	active, confirmed	mid-ocean ridge	JdF Ridge	44.8833	-130.2667	2250	1987-1989 camera/CTD tows
North Cleft, high temperature	active, confirmed	mid-ocean ridge	JdF Ridge	44.9800	-130.2000	2300	1987 camera/CTD tows discovered low-temperature vents; 1988 submersible Alvin sampled low-temperature vents; 1990 submersible Alvin discovered black smoker
Nolan's Nook	active, confirmed	mid-ocean ridge	S EPR	-31.1500	-111.9167	2330	1999 submersible Alvin; 1998 plume only
Niuatahi	active, confirmed	back-arc spreading center	Lau Basin	-15.3790	-174.0196	1635	2009 ROV Jason II; 2003 plume only; 2004 dredging (SS11/2004 cruise); 2005 plume only; 2008 commercial ROV (report does not confirm activity)
Niua South	active, confirmed	arc volcano	Tonga Arc	-15.1650	-173.5700	1180	2008 commercial ROV
Niua North	active, confirmed	arc volcano	Tonga Arc	-15.0667	-173.5667	1375	2012 ROV Quest 4000; 2008 plume only
Nisiros	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	36.5600	27.1400	18	1994 or earlier, likely by SCUBA
Nikko volcano	active, confirmed	arc volcano	Mariana Arc	23.0833	142.3333	600	1992 submersible Shinkai 6500; 1979 first observed discolored water above the seamount
Nifonea Ridge	active, confirmed	back-arc spreading center	New Hebrides back-arc	-18.1330	169.5170	1900	2001 towed video; 2013 ROV Kiel 6000 black smokers
Nibelungen	active, confirmed	mid-ocean ridge	S MAR	-8.3000	-13.5200	2900	2006 AUV ABE followed by ROV Quest; 2004 plume only
NESCA	active, confirmed	mid-ocean ridge	Gorda Ridge	41.0000	-127.4917	3300	1988 submersible Alvin; 1986 dredge and photographs did not confirm activity
NE Pual	active, confirmed	back-arc spreading center	Manus Basin	-3.6754	151.7272	1875	2006 ROV Jason II
Navidad	active, confirmed	mid-ocean ridge	Galapagos Rift	2.5300	-94.0750	2380	2005 towed video Medea
Natsushima 84-1 Knoll	active, confirmed	back-arc spreading center	Okinawa Trough	27.5750	127.1417	1600	1986 submersible Shinkai 2000
Nagahama Bay, Iwo-dake Volcano	active, confirmed	arc volcano	Ryukyu Arc	30.7500	130.3330	26	1994 or earlier intertidal; 2008 or earlier SCUBA subtidal
Myojin Knoll	active, confirmed	arc volcano	Izu-Bonin Arc	32.1033	139.8683	1360	1996 submersible Shinkai 2000
Mussel Valley	active, confirmed	back-arc spreading center	North Fiji Basin	-18.8167	173.4833	2700	1989 submersible Nautile; 1987 plume; 1988 towed camera did not confirm activity
Moytirra	active, confirmed	mid-ocean ridge	N MAR	45.4833	-27.8500	2900	2011 ROV Holland 1; 2008 plume only MAPRs, ROV Isis buoyant plume, but no visual confirmation
Mounds and Microbes	active, confirmed	mid-ocean ridge	N EPR	9.4500	-104.5383	2950	2002 submersible Alvin; 1994 submersible Alvin did not confirm activity
Mothra Field	active, confirmed	mid-ocean ridge	JdF Ridge	47.9233	-129.1082	2270	1996 ROV ROPOS; 1986 plume only
Montserrat Offshore Springs	active, confirmed	arc volcano	Lesser Antilles Arc	16.7100	-62.2300	10	1996 or earlier (assume SCUBA)
Monowai Caldera	active, confirmed	arc volcano	Tonga Arc	-25.8000	-177.1500	1165	2005 with submersibles PISCES IV and PISCES V and ROV RCV-150; 2004 plume only
Mokuyo Seamount	active, confirmed	arc volcano	Izu-Bonin Arc	28.3200	140.5800	1200	1990 submersible Shinkai 2000
Misiteli	active, confirmed	back-arc spreading center	Lau Basin	-22.4700	-176.7030	2050	2008 commercial ROV; 2003 plume only
Minami-Hiyoshi submarine volcano	active, confirmed	arc volcano	Mariana Arc	23.4970	141.9400	80	2005 ROV HyperDolphin
Minami-Ensei Knoll	active, confirmed	back-arc spreading center	Okinawa Trough	28.3917	127.6417	740	1988 deep tow TV surveys followed by submersible Shinkai 2000; 1986 dredged Calyptogena shells
Milos	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	36.6667	24.5167	200	1987 or earlier, likely by SCUBA; 1992 Minirover ROV deeper sites
Middle Valley, Dead Dog Vent Field	active, confirmed	mid-ocean ridge	JdF Ridge	48.4560	-128.7088	2450	1990 HOV Alvin
Middle Valley, Bent Hill Massive Sulfide	active, confirmed	mid-ocean ridge	JdF Ridge	48.4341	-128.6812	2440	1990 HOV Alvin, 1985 deposits only
Methana	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	37.6150	23.3360	10	nearshore: since antiquity; offshore: 1997 SCUBA
Menez Hom	active, confirmed	mid-ocean ridge	N MAR	37.1500	-32.4333	1802	2002 ROV Victor 6000
Menez Gwen	active, confirmed	mid-ocean ridge	N MAR	37.8417	-31.5250	865	1994 submersible Nautile
Medusa	active, confirmed	mid-ocean ridge	N EPR	9.1404	-104.2065	2580	2007 ROV Jason II; 1991 plume only
Maug Caldera	active, confirmed	arc volcano	Mariana Arc	20.0200	145.2200	145	2003 SCUBA shallow vents; 2004 ROV ROPOS deeper vents; 2003 plume only deeper vents
Matupi Harbour, Rabaul caldera, New Britain Island	active, confirmed	arc volcano	Bismarck Arc	-4.2700	152.2000	30	1961 or earlier intertidal
Mata Ua	active, confirmed	arc volcano	Lau Basin	-15.0166	-173.7833	2397	2012 ROV Quest 4000; 2010 plume only (towed camera did not confirm)
Mata Tolu	active, confirmed	arc volcano	Lau Basin	-15.0049	-173.7936	1900	2010 towed camera; 2009 plume and dredge only
Mata Fitu	active, confirmed	arc volcano	Lau Basin	-14.9166	-173.7833	2750	2010 towed camera
Marsili	active, confirmed	back-arc spreading center	Tyrrhenian Back-Arc Basin, Tyrrhenian Sea	39.2600	14.3780	800	2006 ROV Cherokee; 1989 shimmering water but did not confirm activity
Mariner	active, confirmed	back-arc spreading center	Lau Basin	-22.1800	-176.6017	1910	2003 plume and camera tow; 2004 submersible Shinkai 6500
Mariana Trough, Central Trough	active, confirmed	back-arc spreading center	Mariana Trough	18.0467	144.7533	3676	1987 submersible Alvin
Mariana Trough, 15.5 N	active, confirmed	back-arc spreading center	Mariana Trough	15.4080	144.5090	4196	2015 plume only, 2016 ROV did not confirm
Mariana Mounds	active, confirmed	back-arc spreading center	Mariana Trough	18.0333	144.2833	3600	1987 submersible Alvin
MAR, 4 48'S	active, confirmed	mid-ocean ridge	S MAR	-4.8058	-12.3742	3050	2005 AUV ABE (cruise CD169 ) followed by ROV Quest (cruise M64/1)
Manuk Island	active, confirmed	arc volcano	Banda/Sunda Arc	-5.5300	130.2920	2
Maka	active, confirmed	back-arc spreading center	Lau Basin	-15.4217	-174.2850	1660	2008 commercial ROV; 2004 plume only; 2006 plume and chimney samples
Main Endeavour Field	active, confirmed	mid-ocean ridge	JdF Ridge	47.9487	-129.0981	2220	1984 submersible Alvin; 1982 dredge only
Magic Mountain	active, confirmed	mid-ocean ridge	Explorer Ridge	49.7500	-130.2667	1850	1984 submersible Pisces IV
Macdonald Seamount	active, confirmed	intra-plate volcano	Central Pacific	-28.9833	-140.2500	150	1989 submersible Cyana
Macauley Caldera	active, confirmed	arc volcano	Kermadec Arc	-30.2140	-178.7210	500	2002 towed camera TAN0205 cruise
Luso	active, confirmed	mid-ocean ridge	N MAR	38.9833	-29.8833	570	2018 ROV Luso
Luise Harbor, Lihir Island	active, confirmed	arc volcano	Tabar-Feni Arc	-3.1167	152.6500	30	1990 or earlier
Lucky Strike	active, confirmed	mid-ocean ridge	N MAR	37.2933	-32.2733	1740	1993 submersible Alvin; 1992 dredge and plume only
Lost City	active, confirmed	mid-ocean ridge	N MAR	30.1250	-42.1183	800	2000 towed video ARGO-II and submersible Alvin
Longqi	active, confirmed	mid-ocean ridge	SWIR	-37.7838	49.6494	2785	2007 towed video sled followed by AUV ABE; 2005 plume only
Loki's Castle	active, confirmed	mid-ocean ridge	Mohns Ridge	73.5500	8.1500	2400	2008 ROV Bathysaurus
Loihi Seamount	active, confirmed	intra-plate volcano	Central Pacific	18.9500	-155.2500	4800	1985 bottom photography R/V Hakuho Maru; 1987 submersible Alvin
Logatchev-2	active, confirmed	mid-ocean ridge	N MAR	14.7200	-44.9380	2760	2007 ROV VICTOR 6000; 1993-1994 TV grab and towed photo system did not confirm activity; 1996-1998 video imaging and sampling did not confirm activity
Logatchev-1	active, confirmed	mid-ocean ridge	N MAR	14.7520	-44.9785	3050	1993-1994 TV grab and towed photo system; 1995 submersible Mir followed by submersible Nautile
Lilliput	active, confirmed	mid-ocean ridge	S MAR	-9.5500	-13.1800	1500	2005 ROV Quest
Lembeh Strait	active, confirmed	arc volcano	Sangihe Arc	1.8000	125.2000	3	NotProvided
Kulo Lasi	active, confirmed	back-arc spreading center	Lau Basin	-14.9200	-177.2500	1478	2010 submersible Nautile
Kueishan Island, offshore	active, confirmed	back-arc spreading center	Okinawa Trough	24.8333	122.0000	1200	2008 or earlier
Kueishan Island	active, confirmed	back-arc spreading center	Okinawa Trough	24.8333	121.9500	30	1999, likely by SCUBA
Kraternaya Bight, Ushishir Volcano	active, confirmed	arc volcano	Kuril Arc	47.5167	152.8000	60	1985 SCUBA
Kos	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	36.8500	27.2500	10	1983 or earlier, likely by SCUBA
Kolumbo	active, confirmed	arc volcano	Hellenic Arc, Aegean Sea	36.5250	25.4833	500	2006 ROV Hercules
Kolbeinsey Field	active, confirmed	mid-ocean ridge	Kolbeinsey Ridge	67.0833	-18.7167	110	1988 submersible GEO
Kodakara-jima	active, confirmed	arc volcano	Ryukyu Arc	29.2166	129.3333	10	1993 or earlier, likely by SCUBA
Kilo Moana	active, confirmed	back-arc spreading center	Lau Basin	-20.0532	-176.1336	2620	2004 AUV ABE; 2004 plume only on previous cruise
Kick'em Jenny submarine volcano	active, confirmed	arc volcano	Lesser Antilles Arc	12.2833	-61.6667	265	2003 ROV Eastern Oceanics; 1989 submersible Johnson-Sea-Link II (did not confirm activity); 2001 plume only
Kemp Caldera	active, confirmed	arc volcano	South Sandwich Arc	-59.7000	-28.3166	1420	2010 ROV Isis; 2009 plume only
Kawio Barat	active, confirmed	arc volcano	Sangihe Arc	4.8133	125.0816	1890	2003 towed video, CTD/transmissometer, and dredge
Kasuga 3 Seamount	active, confirmed	arc volcano	Mariana Arc	21.3833	143.6000	1140	1987 submersible Alvin
Kasuga 2 Seamount	active, confirmed	arc volcano	Mariana Arc	21.6000	143.6167	500	1987 submersible Alvin
Kairei Field	active, confirmed	mid-ocean ridge	CIR	-25.3195	70.0400	2460	2000 ROV Kaiko; 1993 plume only
Kaikata Seamount	active, confirmed	arc volcano	Izu-Bonin Arc	26.7000	141.0833	930	1988 submersible Shinkai 2000; 1985 dredge only
Kagoshima Bay	active, confirmed	arc volcano	Ryukyu Arc	31.6583	130.8000	200	1993 towed TV system (Haorimushi site); 2007 ROV Hyper-dolphin (Tagiri site)
Kagamil Island	active, confirmed	arc volcano	Aleutian Arc, western	52.9800	-169.7200	5	2007 SCUBA
Jaco Scar	active, confirmed	arc volcano	Costa Rica fore arc	9.1175	-84.8397	1790	2009 submersible Alvin
Izena Cauldron	active, confirmed	back-arc spreading center	Okinawa Trough	27.2667	127.0833	1610	1988 submersible Shinkai 2000
Ischia Island, Gulf of Naples	active, confirmed	other	Coastal Italy	40.7306	13.9500	10	1954 or earlier, from the beach
Isafjardardjup bay	active, confirmed			66.0500	-22.6500	3	1986 or earlier, likely from shore or by SCUBA
Irinovskoye	active, confirmed	mid-ocean ridge	N MAR	13.3327	-44.9099	3000	2013 ROV Victor6000; 2007 dredge only; 2009 or 2011 did not confirm
Irabu Knoll	active, confirmed	back-arc spreading center	Okinawa Trough	25.2300	124.8800	1850	2000 submersible Shinkai 6500; 1986 seafloor photos did not confirm activity
Iguanas-Pinguinos	active, confirmed	mid-ocean ridge	Galapagos Rift	2.1000	-91.9350	1640	2005 towed video Medea
Hot Beach, Mendeleev Volcano	active, confirmed	arc volcano	Kuril Arc	43.9760	145.7360	1	1990 or earlier, from the beach
Hook Ridge	active, confirmed	back-arc spreading center	Bransfield Strait	-62.1940	-57.2745	1080	1997 hot sediment; 1995 plume only; 1999 even hotter sediment
Hinepuia volcanic center	active, confirmed	arc volcano	Kermadec Arc	-26.3900	-177.2600	300	2013 HOV Shinkai 6500; 2004 plume and dredging NZAPLUME III expedition
Hine Hina	active, confirmed	back-arc spreading center	Lau Basin	-22.5300	-176.6970	1900	1989 submersible Nautile
High-Rise Field	active, confirmed	mid-ocean ridge	JdF Ridge	47.9666	-129.0894	2200	1988 submersible Alvin
Higashi-Ensei	active, confirmed	back-arc spreading center	Okinawa Trough	28.4393	128.1724	1220	2016 ROV Kaiko dives 723 and 724
Higa	active, confirmed	back-arc spreading center	Okinawa Trough	26.5550	126.2233	1485	2015 ROV Kaiko
Healy volcano	active, confirmed	arc volcano	Kermadec Arc	-34.9840	178.9990	1370	2005 submersible Pisces V; 1999 plume only
Havre	active, confirmed	arc volcano	Kermadec Arc	-31.0970	-179.0340	1505	2015 ROV Jason II; 2002 plume only
Hafa Adai	active, confirmed	back-arc spreading center	Mariana Trough	16.9570	144.8680	3294	2016 ROV Deep Discoverer; 2015 AUV Sentry plume mapping
Guaymas Basin, Southern Trough	active, confirmed	mid-ocean ridge	Gulf of California	27.0148	-111.4109	2000	1982 submersible Alvin; 1980 DeepTow CTD and dredging
Guaymas Basin, Northern Trough_2	active, confirmed	mid-ocean ridge	Gulf of California	27.4110	-111.3879	1800	2015 ROV Hybis
Grover Seamount	active, confirmed	arc volcano	Solomons Arc	-10.4667	164.2500	600	2002 towed video
Grimsey Field	active, confirmed	mid-ocean ridge	Kolbeinsey Ridge	66.6067	-17.6542	400	1997 submersible Jago
Giggenbach volcano	active, confirmed	arc volcano	Kermadec Arc	-30.0333	-178.7167	180	2005 submersible PISCES V; 2002 plume only
Galapagos Mounds	active, confirmed	mid-ocean ridge	Galapagos Rift	1.4500	-86.1665	2700	1977 submersible Alvin
Futagoyama	active, confirmed	back-arc spreading center	Okinawa Trough	24.8674	123.3081	1270	2016 ROV Kaiko dive 717
FRSC, Fonualei South	active, confirmed	back-arc spreading center	Lau Basin	-17.5352	-174.5668	1620	2012 ROV Quest 4000
Franklin Seamount	active, confirmed	back-arc spreading center	Woodlark Basin	-9.9083	151.8300	2366	1990 submersible Mir
Forecast	active, confirmed	arc volcano	Mariana Arc	13.4000	143.9166	1470	1992 submersible Shinkai 6500
Flow	active, confirmed	mid-ocean ridge	JdF Ridge	46.5250	-129.5783	2390	1993 ROV ROPOS
Floc	active, confirmed	mid-ocean ridge	JdF Ridge	46.3133	-129.7050	2290	1993 DEEPTOW and submersible Alvin
Feather Duster	active, confirmed	mid-ocean ridge	N EPR	10.9267	-103.6767	2520	1984 towed camera and submersible Alvin
Eyjafjördur	active, confirmed	mid-ocean ridge	Kolbeinsey Ridge	65.8500	-18.1333	65	1997, likely by SCUBA
Evan	active, confirmed	mid-ocean ridge	N MAR	37.2667	-32.2833	1775	2006 submersible Nautile
ESR, E9	active, confirmed	back-arc spreading center	East Scotia Ridge	-60.0500	-29.9300	2402	2009 towed video; 1999 plume only; 2010 ROV Isis
ESR, E2	active, confirmed	back-arc spreading center	East Scotia Ridge	-56.0917	-30.3250	2641	2009 towed video; 1999 plume only; 2010 ROV Isis
Espalamaca	active, confirmed	intra-plate volcano		38.5500	-28.6000	50	2010 or earlier likely SCUBA
Esmeralda Bank	active, confirmed	arc volcano	Mariana Arc	14.9667	145.2500	323	1990 towed video and TV-grab; 1978 hydrothermal deposits only
EPR, Ridge 3, 20 40'S	active, confirmed	mid-ocean ridge	S EPR	-20.3333	-113.6792	3050	1983 Deep Tow camera
EPR, Ridge 1, 20 40'S	active, confirmed	mid-ocean ridge	S EPR	-20.8333	-114.1667	3000	1983 Deep Tow camera
EPR, 9 50'N	active, confirmed	mid-ocean ridge	N EPR	9.8300	-104.2900	2520	1989 Argo I towed video
EPR, 9 47'N	active, confirmed	mid-ocean ridge	N EPR	9.7750	-104.2802	2560	1989 Argo I towed video; 1991 submersible Alvin
EPR, 9 40'N	active, confirmed	mid-ocean ridge	N EPR	9.6500	-104.2600	2572	1989 Argo I towed video; 1991 submersible Alvin
EPR, 9 33'N	active, confirmed	mid-ocean ridge	N EPR	9.5583	-104.2500	2574	1989 Argo I towed video; 1991 submersible Alvin
EPR, 9 30'N	active, confirmed	mid-ocean ridge	N EPR	9.5167	-104.2414	2580	1989 Argo I towed video
EPR, 9 17'N	active, confirmed	mid-ocean ridge	N EPR	9.2800	-104.2166	2585	1989 Argo I towed video
EPR, 8 38'N	active, confirmed	mid-ocean ridge	N EPR	8.6333	-104.2000	2550	2003 submersible Alvin; 1989 dredge only; 2002 plume only
EPR, 7 25'S	active, confirmed	mid-ocean ridge	S EPR	-7.4167	-107.8000	2750	1985/86 or 1989 TV grab (need to check references to confirm activity); 1998 submersible Alvin
EPR, 37 48'S Axial Dome	active, confirmed	mid-ocean ridge	Pacific-Antarctic Ridge	-37.8000	-110.9167	2200	2001 towed video and TV-grab
EPR, 37 40'S Axial Dome	active, confirmed	mid-ocean ridge	Pacific-Antarctic Ridge	-37.6667	-110.8667	2240	1997 video survey L'Atalante (do not know if activity confirmed); 1995 TV survey did not confirm activity; 2001 towed video and TV-grab definitely confirmed
EPR, 3.9 N offset	active, confirmed	mid-ocean ridge	N EPR	3.9170	-102.2330	2875	1989 or earlier Deep Tow photographs (cruise RIFTS or PAPATUA)
EPR, 26.5 S	active, confirmed	mid-ocean ridge	S EPR	-26.4833	-112.6250	2064	1993 submersible Nautile (or earlier)
EPR, 26 10'S	active, confirmed	mid-ocean ridge	S EPR	-26.2050	-112.6133	2600	1987 or earlier [need to check Marchig & Gundlach (1987)]; 2005 submersible Alvin did not observe active vents
EPR, 23 50'S	active, confirmed	mid-ocean ridge	S EPR	-23.8233	-115.4558	2650	2005 submersible Alvin; 1990 or earlier towed TV camera did not confirm activity
EPR, 23 30'S	active, confirmed	mid-ocean ridge	S EPR	-23.5333	-115.5667	2600	1987 or earlier [need to check Marchig & Gundlach (1987)]; 2005 submersible Alvin
EPR, 21 N	active, confirmed	mid-ocean ridge	N EPR	20.8333	-109.0833	2600	1979 submersible Alvin; 1978 submersible Cyana discovered mineral deposits only
EPR, 21 25'S	active, confirmed	mid-ocean ridge	S EPR	-21.4333	-114.2917	2850	1984 submersible Cyana; 1983 deposits only
EPR, 20 06'S	active, confirmed	mid-ocean ridge	S EPR	-20.1000	-113.7080	3000	1981 Angus camera tow; 1984 submersible Cyana
EPR, 2 S	active, confirmed	mid-ocean ridge	S EPR	-2.2200	-102.6550	2900	2008 towed video and AUV ABE
EPR, 18 32'S	active, confirmed	mid-ocean ridge	S EPR	-18.5550	-113.4160	2647	1993 submersible Nautile
EPR, 18 26'S	active, confirmed	mid-ocean ridge	S EPR	-18.4333	-113.3833	2650	1993 submersible Nautile; 1983 seafloor photos, temperature anomalies, and deposits did not confirm activity; 1984 submersible Cyana observed only inactive sites; 1985/86 or 1989 TV grab (need to check references to confirm activity)
EPR, 18 15'S	active, confirmed	mid-ocean ridge	S EPR	-18.2500	-113.3500	2680	1993 submersible Nautile
EPR, 18 10'S	active, confirmed	mid-ocean ridge	S EPR	-18.1700	-113.3440	2700	1993 submersible Nautile; 1983 temperature and light attenuation anomalies
EPR, 17 44'S	active, confirmed	mid-ocean ridge	S EPR	-17.7330	-113.2660	2622	1998 submersible Alvin; 1993 plume only; not explored by Nautile in 1993 or Shinkai 6500 in 1994
EPR, 17 34'S	active, confirmed	mid-ocean ridge	S EPR	-17.5667	-113.2333	2600	1994 submersible Shinkai 6500; 1996 Argo II towed video
EPR, 17 12'S	active, confirmed	mid-ocean ridge	S EPR	-17.2000	-113.1500	2590	1993 submersible Nautile
EPR, 14 S	active, confirmed	mid-ocean ridge	S EPR	-13.9667	-112.4667	2635	1985/86 or 1989 TV grab (need to check references to confirm activity); 1993 plume only; 1994 submersible Shinkai 6500
EPR, 13 N, Marginal High	active, confirmed	mid-ocean ridge	N EPR	12.7090	-103.9160	2650	1984 submersible Cyana; 1981 towed camera, dredging, and plume did not confirm activity
EPR, 13 N	active, confirmed	mid-ocean ridge	N EPR	12.8333	-103.9500	2630	1982 submersible Cyana; 1981 towed camera, dredging, and plume did not confirm activity
EPR, 11 42'N	active, confirmed	mid-ocean ridge	N EPR	11.7000	-103.8500	2580	1984 Angus camera (or 1985 Argo video) tow with temperature
EPR, 11 24'N	active, confirmed	mid-ocean ridge	N EPR	11.4000	-103.7800	2580	1990 submersible Alvin; 1988 submersible Alvin dive #1994 (need reference to confirm activity)
EPR, 11 18'S	active, confirmed	mid-ocean ridge	S EPR	-11.3000	-110.5300	2650	1985/86 or 1989 TV grab (need to check references to confirm activity); 1998 submersible Alvin
EPR, 11 17'N	active, confirmed	mid-ocean ridge	N EPR	11.2833	-103.7583	2560	1984 Angus camera (or 1985 Argo video) tow with temperature
EPR, 10 44.6'N	active, confirmed	mid-ocean ridge	N EPR	10.7433	-103.6500	2580	1985 Argo video tow with temperature
EPR, 10 02'N	active, confirmed	mid-ocean ridge	N EPR	10.0330	-104.3300	2560	1992 submersible Alvin
EPR, 1.4 S, off-axis	active, confirmed	mid-ocean ridge	S EPR	-1.3690	-102.4560	3000	2008 towed video
Epi Caldera	active, confirmed	arc volcano	New Hebrides Arc	-16.6870	168.4000	320	2013 ROV Kiel6000; 1974 sediment samples only; 2001 plume and camera tow (did not confirm activity)
Enarete Seamount	active, confirmed	arc volcano	Aeolian Arc, Tyrrhenian Sea	38.6250	14.0000	600	2011 ROV Hercules; 1976 Fe crusts only; 1997 manganese crust only; 2007 plume only
El Hierro, Tagoro	active, confirmed	intra-plate volcano		27.6200	-17.9900	350	2016 submersible JAGO, 2017 ROV Liropus 2000, 2011 water column sampling
Edmond Field	active, confirmed	mid-ocean ridge	CIR	-23.8780	69.5960	3320	2001 ROV Jason
East Diamante volcano	active, confirmed	arc volcano	Mariana Arc	15.9300	145.6700	457	2004 ROV ROPOS; 2003 plume only
East Blanco Depression	active, confirmed	mid-ocean ridge	JdF Ridge	44.2170	-129.6250	3460	1994 ROV U.S. Navy's Advanced Tethered Vehicle
Doyo Seamount	active, confirmed	arc volcano	Izu-Bonin Arc	27.6833	140.8167	520	1990 submersible Shinkai 2000
Dorado Outcrop	active, confirmed	other		9.0800	-87.0950	3000	2013 ROV Jason Dive J2-751
Don Joao de Castro Bank	active, confirmed	mid-ocean ridge	Terceira Rift	38.2300	-26.6300	45	1995 SCUBA
Dodo Field	active, confirmed	mid-ocean ridge	CIR	-18.3470	65.3050	2730	2009 submersible Shinkai 6500; 2006 plume only
Deyin-1	active, confirmed	mid-ocean ridge	S MAR	-15.1666	-13.3558	2850	2012 TV-grab; 2011 deposits only; 2013 plume only
DESMOS Cauldron	active, confirmed	back-arc spreading center	Manus Basin	-3.6958	151.8717	2000	1990 deep-sea monitoring system (DESMOS) video and still cameras
Deception Island	active, confirmed	back-arc spreading center	Bransfield Strait	-62.9500	-60.6500	100	1995 or earlier intertidal
Daisan-Kume Knoll	active, confirmed	arc volcano	Ryukyu Arc	26.3020	126.4125	1370	2015 ROV Kaiko; 2014 ROV Hyper Dolphin 3000 Dive 1761 may have confirmed; 2014 AUV temperature anomaly
Daikoku volcano	active, confirmed	arc volcano	Mariana Arc	21.3240	144.1940	450	2004 ROV ROPOS; 2003 plume only
CLSC, A3	active, confirmed	back-arc spreading center	Lau Basin	-18.6000	-176.4500	2500	1990 submersible Mir
Clark volcano	active, confirmed	arc volcano	Kermadec Arc	-36.4490	177.8400	930	2005 submersible Pisces V; 1999 plume only
Champagne Hot Springs	active, confirmed	arc volcano	Lesser Antilles Arc	15.2500	-61.3830	5	2001 or earlier (assume SCUBA)
Chamorro volcano	active, confirmed	arc volcano	Mariana Arc	20.8100	144.7050	896	2016 ROV Deep Discoverer; 2003 plume only
Central Cleft, off-axis	active, confirmed	mid-ocean ridge	JdF Ridge	44.7583	-130.2750	2200	2000 ROV Tiburon
Capo Palinuro	active, confirmed	other	Coastal Italy	40.0167	15.2667	30	1990 or earlier, likely by SCUBA
Capo Miseno, Gulf of Naples	active, confirmed	other	Coastal Italy	40.7833	14.0833	20	1982 or earlier, likely by SCUBA
Calypso Vents	active, confirmed	back-arc spreading center	Taupo Volcanic Zone	-37.6800	177.1170	200	1989 submersible Soucoup
Calyfield	active, confirmed	mid-ocean ridge	Galapagos Rift	0.8300	-89.6083	1660	2002 submersible Alvin
Bubbylon	active, confirmed	mid-ocean ridge	N MAR	37.8000	-31.5333	1000	2010 ROV MARUM-QUEST, same cruise as plume discovered by multibeam echosounder
Brothers volcano	active, confirmed	arc volcano	Kermadec Arc	-34.8667	179.0667	1800	1998 towed camera; 1996 dredging only
Broken Spur	active, confirmed	mid-ocean ridge	N MAR	29.1700	-43.1717	3100	1993 submersible Alvin; earlier in 1993, water column anomalies and towed camera did not confirm activity
Bounty Seamount	active, confirmed	intra-plate volcano	Central Pacific	-25.1667	-129.4000	420	1999 submersible Nautile; 1989 plume only
Beebe	active, confirmed	mid-ocean ridge	Mid-Cayman Rise	18.5466	-81.7182	4957	2010 AUV Autosub6000 and HyBIS TVG; 2009 plume only
Banua Wuhu submarine volcano	active, confirmed	arc volcano	Sangihe Arc	3.1380	125.4910	10	1996 or earlier, likely by SCUBA
Banda Api	active, confirmed	arc volcano	Banda/Sunda Arc	-4.5250	129.8710	3	1993 SCUBA
Bahia Concepcion	active, confirmed	other	Coastal Baja California	26.6667	-111.8333	15	1968 or earlier, likely by SCUBA
Baby Bare Seamount	active, confirmed	mid-ocean ridge	JdF Ridge	47.7100	-127.7870	2600	1995 submersible Alvin
Axial Seamount, International District	active, confirmed	mid-ocean ridge	JdF Ridge	45.9266	-129.9795	1544	1986 submersible Pisces IV
Axial Seamount, CASM	active, confirmed	mid-ocean ridge	JdF Ridge	45.9892	-130.0272	1580	1983 submersible Pisces IV
Axial Seamount, ASHES	active, confirmed	mid-ocean ridge	JdF Ridge	45.9333	-130.0140	1540	1984 submersible Alvin
Aurora	active, confirmed	mid-ocean ridge	Gakkel Ridge	82.8833	-6.2500	4100	2001 shimmering water in camera tow and sulfide chimney in dredge
Ashadze-2	active, confirmed	mid-ocean ridge	N MAR	12.9917	-44.9067	3300	2007 ROV Victor 6000; 2005 TV profiling, plume, and dredge did not confirm activity
Ashadze-1	active, confirmed	mid-ocean ridge	N MAR	12.9733	-44.8633	4200	2003 TV profiling; 2007 ROV Victor 6000
Animal Farm	active, confirmed	mid-ocean ridge	S EPR	-18.6080	-113.4000	2675	1993 submersible Nautile
Alice Springs Field	active, confirmed	back-arc spreading center	Mariana Trough	18.2103	144.7073	3640	1987 submersible Alvin; 1982 plume only
Alarcon Rise, Tzab-ek	active, confirmed	mid-ocean ridge	Gulf of California	23.3526	-108.5597	2249	2015 ROV Doc Ricketts
Alarcon Rise, Meyibo	active, confirmed	mid-ocean ridge	Gulf of California	23.3553	-108.5443	2295	2012 ROV Doc Ricketts
Alarcon Rise, Ja Sit	active, confirmed	mid-ocean ridge	Gulf of California	23.3765	-108.5315	2304	2012 ROV Doc Ricketts
Akuseki-jima	active, confirmed	arc volcano	Ryukyu Arc	29.4610	129.5970	5	1993 or earlier, likely by SCUBA
AHA Field	active, confirmed	mid-ocean ridge	N EPR	1.7333	-102.2830	2850	2000 towed imaging ARGO-II
Aegir	active, confirmed	mid-ocean ridge	Mohns Ridge	72.3440	1.5550	2600	2015 ROV Ægir 6000; 2013 plume only; 2015 AUV
Adventure Caldera	active, confirmed	arc volcano	South Sandwich Arc	-59.7210	-27.8571	520	2011 SHRIMP towed camera system; 2010 high resolution bathymetry only
Aden	active, confirmed	mid-ocean ridge	Aden Ridge	11.9500	43.6667	1600	1984 submersible Cyana
ABE	active, confirmed	back-arc spreading center	Lau Basin	-20.7619	-176.1910	2220	2004 AUV ABE; 2004 plume only on previous cruise
13 N Ridge Site	active, confirmed	back-arc spreading center	Mariana Trough	13.0987	143.6886	3036	2000 deep-tow camera (later, same year - ROV Kaiko)

Search form

You are here