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mid-ocean ridge

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 Activitysort descending Tectonic Setting Region Latitude Longitude Maximum or Single Reported Depth Year and How Discovered
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
Dodo Field active, confirmed mid-ocean ridge CIR -18.3470 65.3050 2730 2009 submersible Shinkai 6500; 2006 plume only
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
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
Pegasus active, confirmed mid-ocean ridge Galapagos Rift 0.7500 -88.2000 2000 2011 ROV Little Hercules
Salty Dawg Field active, confirmed mid-ocean ridge JdF Ridge 47.9822 -129.0756 2200 1995 submersible Alvin, followed by ROV ROPOS
Deyin-1 active, confirmed mid-ocean ridge S MAR -15.1666 -13.3558 2850 2012 TV-grab; 2011 deposits only; 2013 plume only
Aurora active, confirmed mid-ocean ridge Gakkel Ridge 82.8833 -6.2500 4100 2001 shimmering water in camera tow and sulfide chimney in dredge
Flow active, confirmed mid-ocean ridge JdF Ridge 46.5250 -129.5783 2390 1993 ROV ROPOS
EPR, 10 44.6'N active, confirmed mid-ocean ridge N EPR 10.7433 -103.6500 2580 1985 Argo video tow with temperature
Galapagos Mounds active, confirmed mid-ocean ridge Galapagos Rift 1.4500 -86.1665 2700 1977 submersible Alvin
Von Damm active, confirmed mid-ocean ridge Mid-Cayman Rise 18.3777 -81.7972 2372 2010 AUV Autosub6000 and HyBIS TVG; 2009 plume only
EPR, 26.5 S active, confirmed mid-ocean ridge S EPR -26.4833 -112.6250 2064 1993 submersible Nautile (or earlier)
AHA Field active, confirmed mid-ocean ridge N EPR 1.7333 -102.2830 2850 2000 towed imaging ARGO-II
Lilliput active, confirmed mid-ocean ridge S MAR -9.5500 -13.1800 1500 2005 ROV Quest
Precious Stone Mountain active, confirmed mid-ocean ridge Galapagos Rift 1.2200 -101.4900 1700 2009 deep-tow video and TV grab
Uka Pacha active, confirmed mid-ocean ridge Galapagos Rift 0.7700 -88.3000 2100 2011 ROV Little Hercules
Middle Valley, Dead Dog Vent Field active, confirmed mid-ocean ridge JdF Ridge 48.4560 -128.7088 2450 1990 HOV Alvin
NESCA active, confirmed mid-ocean ridge Gorda Ridge 41.0000 -127.4917 3300 1988 submersible Alvin; 1986 dredge and photographs did not confirm activity
Loki's Castle active, confirmed mid-ocean ridge Mohns Ridge 73.5500 8.1500 2400 2008 ROV Bathysaurus
Zouyu ridge active, confirmed mid-ocean ridge S MAR -13.2800 -14.4100 2315 2009 towed video
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, 21 25'S active, confirmed mid-ocean ridge S EPR -21.4333 -114.2917 2850 1984 submersible Cyana; 1983 deposits only
Aegir active, confirmed mid-ocean ridge Mohns Ridge 72.3440 1.5550 2600 2015 ROV Ægir 6000; 2013 plume only; 2015 AUV
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
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)
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
Ashadze-1 active, confirmed mid-ocean ridge N MAR 12.9733 -44.8633 4200 2003 TV profiling; 2007 ROV Victor 6000
Middle Valley, Bent Hill Massive Sulfide active, confirmed mid-ocean ridge JdF Ridge 48.4341 -128.6812 2440 1990 HOV Alvin, 1985 deposits only
Longqi active, confirmed mid-ocean ridge SWIR -37.7838 49.6494 2785 2007 towed video sled followed by AUV ABE; 2005 plume only
EPR, 9 33'N active, confirmed mid-ocean ridge N EPR 9.5583 -104.2500 2574 1989 Argo I towed video; 1991 submersible Alvin
Menez Hom active, confirmed mid-ocean ridge N MAR 37.1500 -32.4333 1802 2002 ROV Victor 6000
Kolbeinsey Field active, confirmed mid-ocean ridge Kolbeinsey Ridge 67.0833 -18.7167 110 1988 submersible GEO
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
Teotihuacan active, confirmed mid-ocean ridge N EPR 15.7333 -105.4333 2300 2010 submersible Nautile; 1997 plume only
EPR, Ridge 1, 20 40'S active, confirmed mid-ocean ridge S EPR -20.8333 -114.1667 3000 1983 Deep Tow camera
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;
Calyfield active, confirmed mid-ocean ridge Galapagos Rift 0.8300 -89.6083 1660 2002 submersible Alvin
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
EPR, 18 15'S active, confirmed mid-ocean ridge S EPR -18.2500 -113.3500 2680 1993 submersible Nautile
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
Baby Bare Seamount active, confirmed mid-ocean ridge JdF Ridge 47.7100 -127.7870 2600 1995 submersible Alvin
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, 9 40'N active, confirmed mid-ocean ridge N EPR 9.6500 -104.2600 2572 1989 Argo I towed video; 1991 submersible Alvin
Axial Seamount, ASHES active, confirmed mid-ocean ridge JdF Ridge 45.9333 -130.0140 1540 1984 submersible Alvin
Magic Mountain active, confirmed mid-ocean ridge Explorer Ridge 49.7500 -130.2667 1850 1984 submersible Pisces IV
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
Don Joao de Castro Bank active, confirmed mid-ocean ridge Terceira Rift 38.2300 -26.6300 45 1995 SCUBA
EPR, 17 12'S active, confirmed mid-ocean ridge S EPR -17.2000 -113.1500 2590 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
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
Ribeira Quente active, confirmed mid-ocean ridge Terceira Rift 37.7250 -25.3160 10 1986 or earlier, likely from shore or by SCUBA
Main Endeavour Field active, confirmed mid-ocean ridge JdF Ridge 47.9487 -129.0981 2220 1984 submersible Alvin; 1982 dredge only
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, 9 47'N active, confirmed mid-ocean ridge N EPR 9.7750 -104.2802 2560 1989 Argo I towed video; 1991 submersible Alvin
Axial Seamount, CASM active, confirmed mid-ocean ridge JdF Ridge 45.9892 -130.0272 1580 1983 submersible Pisces IV
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
North Cleft, low temperature active, confirmed mid-ocean ridge JdF Ridge 44.8833 -130.2667 2250 1987-1989 camera/CTD tows
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
High-Rise Field active, confirmed mid-ocean ridge JdF Ridge 47.9666 -129.0894 2200 1988 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, 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)
Nibelungen active, confirmed mid-ocean ridge S MAR -8.3000 -13.5200 2900 2006 AUV ABE followed by ROV Quest; 2004 plume only
Nolan's Nook active, confirmed mid-ocean ridge S EPR -31.1500 -111.9167 2330 1999 submersible Alvin; 1998 plume only
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, 9 50'N active, confirmed mid-ocean ridge N EPR 9.8300 -104.2900 2520 1989 Argo I towed video
Navidad active, confirmed mid-ocean ridge Galapagos Rift 2.5300 -94.0750 2380 2005 towed video Medea
Soria Moria active, confirmed mid-ocean ridge Mohns Ridge 71.2593 -5.8146 750 2005 ROV BIODEEP-05 cruise
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
Axial Seamount, International District active, confirmed mid-ocean ridge JdF Ridge 45.9266 -129.9795 1544 1986 submersible Pisces IV
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
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)
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
Evan active, confirmed mid-ocean ridge N MAR 37.2667 -32.2833 1775 2006 submersible Nautile
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
Mothra Field active, confirmed mid-ocean ridge JdF Ridge 47.9233 -129.1082 2270 1996 ROV ROPOS; 1986 plume only
EPR, 18 32'S active, confirmed mid-ocean ridge S EPR -18.5550 -113.4160 2647 1993 submersible Nautile
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
Alarcon Rise, Ja Sit active, confirmed mid-ocean ridge Gulf of California 23.3765 -108.5315 2304 2012 ROV Doc Ricketts
Pito Seamount active, confirmed mid-ocean ridge S EPR -23.3275 -111.6402 2270 1993 submersible Nautile
Kairei Field active, confirmed mid-ocean ridge CIR -25.3195 70.0400 2460 2000 ROV Kaiko; 1993 plume only
Guaymas Basin, Northern Trough_2 active, confirmed mid-ocean ridge Gulf of California 27.4110 -111.3879 1800 2015 ROV Hybis
Rainbow active, confirmed mid-ocean ridge N MAR 36.2300 -33.9020 2320 1997 submersible Nautile
Troll Wall active, confirmed mid-ocean ridge Mohns Ridge 71.2833 -5.7667 550 2005 ROV BIODEEP-05 cruise
South Cleft active, confirmed mid-ocean ridge JdF Ridge 44.6667 -130.3667 2250 1981 deep-tow photographs; 1984 submersible Alvin
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
Lucky Strike active, confirmed mid-ocean ridge N MAR 37.2933 -32.2733 1740 1993 submersible Alvin; 1992 dredge and plume only
Floc active, confirmed mid-ocean ridge JdF Ridge 46.3133 -129.7050 2290 1993 DEEPTOW and submersible Alvin
EPR, 20 06'S active, confirmed mid-ocean ridge S EPR -20.1000 -113.7080 3000 1981 Angus camera tow; 1984 submersible Cyana
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, 37 48'S Axial Dome active, confirmed mid-ocean ridge Pacific-Antarctic Ridge -37.8000 -110.9167 2200 2001 towed video and TV-grab
Alarcon Rise, Meyibo active, confirmed mid-ocean ridge Gulf of California 23.3553 -108.5443 2295 2012 ROV Doc Ricketts
Saldanha active, confirmed mid-ocean ridge N MAR 36.5667 -33.4333 2300 1998 submersible Nautile
Eyjafjördur active, confirmed mid-ocean ridge Kolbeinsey Ridge 65.8500 -18.1333 65 1997, likely by SCUBA
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
Rapa Nui active, confirmed mid-ocean ridge S EPR -21.5620 -114.3000 2845 1999 submersible Alvin; 1987-1988 deposits only
EPR, 9 17'N active, confirmed mid-ocean ridge N EPR 9.2800 -104.2166 2585 1989 Argo I towed video
Luso active, confirmed mid-ocean ridge N MAR 38.9833 -29.8833 570 2018 ROV Luso
Iguanas-Pinguinos active, confirmed mid-ocean ridge Galapagos Rift 2.1000 -91.9350 1640 2005 towed video Medea
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
East Blanco Depression active, confirmed mid-ocean ridge JdF Ridge 44.2170 -129.6250 3460 1994 ROV U.S. Navy's Advanced Tethered Vehicle
TAG active, confirmed mid-ocean ridge N MAR 26.1367 -44.8267 3670 1985 towed camera and temperature anomaly; 1986 submersible Alvin
Source active, confirmed mid-ocean ridge JdF Ridge 46.1550 -129.8100 2055 1993 submersible Alvin
Red Seamount active, confirmed mid-ocean ridge N EPR 20.8033 -109.3783 2000 1982 submersible Alvin
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)
Alarcon Rise, Tzab-ek active, confirmed mid-ocean ridge Gulf of California 23.3526 -108.5597 2249 2015 ROV Doc Ricketts
Lost City active, confirmed mid-ocean ridge N MAR 30.1250 -42.1183 800 2000 towed video ARGO-II and submersible Alvin
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)
EPR, 10 02'N active, confirmed mid-ocean ridge N EPR 10.0330 -104.3300 2560 1992 submersible Alvin
Solitaire Field active, confirmed mid-ocean ridge CIR -19.5450 65.8500 2630 2009 submersible Shinkai 6500; 2006 plume only
EPR, 9 30'N active, confirmed mid-ocean ridge N EPR 9.5167 -104.2414 2580 1989 Argo I towed video
Edmond Field active, confirmed mid-ocean ridge CIR -23.8780 69.5960 3320 2001 ROV Jason
Menez Gwen active, confirmed mid-ocean ridge N MAR 37.8417 -31.5250 865 1994 submersible Nautile
Stealth active, confirmed mid-ocean ridge S EPR -17.6167 -113.2330 2600 1996 Argo II towed video; 1993 plume only; 1998 submersible Alvin
EPR, 1.4 S, off-axis active, confirmed mid-ocean ridge S EPR -1.3690 -102.4560 3000 2008 towed video
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)
Animal Farm active, confirmed mid-ocean ridge S EPR -18.6080 -113.4000 2675 1993 submersible Nautile
Aden active, confirmed mid-ocean ridge Aden Ridge 11.9500 43.6667 1600 1984 submersible Cyana
Feather Duster active, confirmed mid-ocean ridge N EPR 10.9267 -103.6767 2520 1984 towed camera and submersible Alvin
Grimsey Field active, confirmed mid-ocean ridge Kolbeinsey Ridge 66.6067 -17.6542 400 1997 submersible Jago
Central Cleft, off-axis active, confirmed mid-ocean ridge JdF Ridge 44.7583 -130.2750 2200 2000 ROV Tiburon
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
Medusa active, confirmed mid-ocean ridge N EPR 9.1404 -104.2065 2580 2007 ROV Jason II; 1991 plume only
EPR, 2 S active, confirmed mid-ocean ridge S EPR -2.2200 -102.6550 2900 2008 towed video and AUV ABE
Semyenov-2 active, confirmed mid-ocean ridge N MAR 13.5137 -44.9630 2440 2009 TV grab and photo-TV profiling; 2007 deposits only
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
Tempus Fugit active, confirmed mid-ocean ridge Galapagos Rift 0.7683 -85.9100 2560 2011 ROV Little Hercules
Sasquatch Field active, confirmed mid-ocean ridge JdF Ridge 47.9969 -129.0662 2200 2000 submersible Alvin
Saguaro Field active, confirmed mid-ocean ridge S EPR -31.8500 -112.0333 2330 1999 submersible Alvin; 1998 plume only
Ringvent active, confirmed mid-ocean ridge Gulf of California 27.5083 -111.6792 1740 2016 submersible Alvin; 2009 towed camera/CTD/bottles
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
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
EPR, Ridge 3, 20 40'S active, confirmed mid-ocean ridge S EPR -20.3333 -113.6792 3050 1983 Deep Tow camera
Beebe active, confirmed mid-ocean ridge Mid-Cayman Rise 18.5466 -81.7182 4957 2010 AUV Autosub6000 and HyBIS TVG; 2009 plume only
MAR, 30.8 S active, inferred mid-ocean ridge S MAR -30.8327 -13.4690 2950 2013 plume only
S AMAR 2 active, inferred mid-ocean ridge N MAR 35.9670 -34.1830 2240 1992 plume only; 1994 plume only
Puy des Folles active, inferred mid-ocean ridge N MAR 20.5083 -45.6417 2000 1996 submersible Nautile observed only inactive vents
MAR, 43 N active, inferred mid-ocean ridge N MAR 43.0000 -29.0000 3400 1986 or earlier plume only
CIR, 8-17 S, Segment 6, 14.75 S active, inferred mid-ocean ridge CIR -14.7500 66.5000 3400 2010 plume only
EPR, 15 S active, inferred mid-ocean ridge S EPR -15.0000 -112.7700 2640 1985/86 or 1989 TV grab (need to check references to confirm activity); 1993 plume only
SWIR, 63.9 E active, inferred mid-ocean ridge SWIR -27.8510 63.9230 2759 2009 DY115-20 Leg 7 (need reference to confirm activity)
GEISEIR site 28, segment M6 active, inferred mid-ocean ridge SEIR -44.7237 94.6039 2700 2009 plume only
EPR, southern 16 N segment active, inferred mid-ocean ridge N EPR 15.5000 -105.4000 2300 1997 plume only
EPR, 2 S, off-axis active, inferred mid-ocean ridge S EPR -2.0840 -102.8270 3000 2008 plume only
EPR, 29.8 S, Segment E1 active, inferred mid-ocean ridge S EPR -29.8000 -111.7300 2580 1998 plume only
EPR, 17 47'S active, inferred mid-ocean ridge S EPR -17.7900 -113.3000 2600 1993 plume only
Carlsberg Ridge, 63 50'E active, inferred mid-ocean ridge Carlsberg Ridge 3.6916 63.8333 3500 2009 plume only; 2012 plume and deposits
GEISEIR site 1, segment J2 active, inferred mid-ocean ridge SEIR -39.4400 78.0920 2270 1996 plume only
SWIR, D82 active, inferred mid-ocean ridge SWIR -52.2080 15.5830 4100 2000-2001 plume only
CIR, 8-17 S, Segment 1 active, inferred mid-ocean ridge CIR -8.2500 68.2000 3600 2010 plume only
Gorda Ridge, EP96A active, inferred mid-ocean ridge Gorda Ridge 42.6790 -126.7820 3150 1996 camera/temperature tow followed by ROV did not confirm hydrothermal activity
GEISEIR site 17, segment L3 active, inferred mid-ocean ridge SEIR -41.6498 87.3481 2500 2010 plume only
Chile Rise, Segment N8 active, inferred mid-ocean ridge Chile Rise -38.7167 -91.5667 3330 1998 plume only
SEIR-WXC27 active, inferred mid-ocean ridge SEIR -50.4000 134.3000 2760 2015 plume only
GEISEIR site 4, segment K1 active, inferred mid-ocean ridge SEIR -41.2025 81.0625 2800 2010 plume only
Galapagos Rift, 95.5 W active, inferred mid-ocean ridge Galapagos Rift 2.6700 -95.4500 3200 1990 submersible Alvin did not confirm activity
near Jade Emperor Mountain, on-axis active, inferred mid-ocean ridge SWIR -37.8666 49.2166 3000 2010 plume only
EPR, 10 34'S active, inferred mid-ocean ridge S EPR -10.5667 -110.2800 2900 1985/86 or 1989 TV grab (need to check references to confirm activity)
EPR, northern 17 N segment active, inferred mid-ocean ridge N EPR 17.6700 -105.0050 2800 1997 plume only
EPR, 21 20'S active, inferred mid-ocean ridge S EPR -21.3670 -114.2570 2900 1981 plume only; 1987-1988 deposits only
Red Sea Rift, 18 N active, inferred mid-ocean ridge Red Sea 17.9667 40.0667 1500 1980 submersible Pisces XI (deposits only)
MAR, 31 S active, inferred mid-ocean ridge S MAR -31.7377 -13.3772 3050 2013 plume only
S Oceanographer active, inferred mid-ocean ridge N MAR 34.8670 -36.4330 3460 1992 plume only
MAR, 14 54'N active, inferred mid-ocean ridge N MAR 14.9200 -44.9000 3500 1988 or earlier seafloor photographs did not confirm hydrothermal activity
Reykjanes Ridge, Area A active, inferred mid-ocean ridge Reykjanes Ridge 62.4500 -25.4330 500 NotProvided
EPR, 16 24'S active, inferred mid-ocean ridge S EPR -16.4000 -113.0500 2640 1993 plume only
Vityaz megamullion active, inferred mid-ocean ridge CIR -5.4000 68.5833 3500 1979 plume and deposits only
SWIR, Plume 3, Segment 16 active, inferred mid-ocean ridge SWIR -30.8500 59.3830 3900 1997 plume only
GEISEIR site 29, segment M6 active, inferred mid-ocean ridge SEIR -44.9054 94.9673 2700 2009 plume only
Neptune's Beard active, inferred mid-ocean ridge N MAR 12.9100 -44.9000 4100 1984 plume only; 2000 TV survey did not confirm activity
EPR, 30.1 S, Segment E1 active, inferred mid-ocean ridge S EPR -30.1330 -111.7640 2480 1998 plume only
EPR, 17 53'S active, inferred mid-ocean ridge S EPR -17.8800 -113.3000 2610 1993 plume only
GEISEIR site 3, segment J4 active, inferred mid-ocean ridge SEIR -41.7720 79.7530 2800 1996 plume only
Duanqiao active, inferred mid-ocean ridge SWIR -37.6579 50.4671 1780 2008 video and TV-grab DY115-20 Leg 5; 2015 TV-grab DY125-34
EPR, 10 08'N active, inferred mid-ocean ridge N EPR 10.1300 -104.3300 2580 1983 towed camera and temperature measurements (no direct observations/sampling of hydrothermal fluid)
GEISEIR site 18, segment L3 active, inferred mid-ocean ridge SEIR -41.7133 87.4375 2500 2010 plume only
Chile Rise, Segment N9A active, inferred mid-ocean ridge Chile Rise -39.0500 -91.5833 3450 1998 plume only
SEIR-WXC15 active, inferred mid-ocean ridge SEIR -50.2500 135.3000 3000 2015 plume only
GEISEIR site 6, segment K2 active, inferred mid-ocean ridge SEIR -41.6600 81.6617 2600 2007 plume only; 2010 plume only
MAR, segment south of St. Paul system active, inferred mid-ocean ridge N MAR 0.5000 -25.0000 3500 2013 plume only
EPR, southern 17 N segment active, inferred mid-ocean ridge N EPR 16.5800 -105.3000 2700 1997 plume only
Suakin Deep active, inferred mid-ocean ridge Red Sea 19.6333 38.7333 2850 1972 deposits only
SWIR, Plume 5 active, inferred mid-ocean ridge SWIR -27.9170 64.4500 4000 1997 plume only
GEISEIR site 30, segment O1 active, inferred mid-ocean ridge SEIR -46.6240 96.0594 2500 2009 plume only
S-OH1 active, inferred mid-ocean ridge N MAR 34.5330 -36.8500 3000 1996 submersible Nautile did not find active vents; 2000 or earlier plume only
MAR, south of 15 20'N fracture zone active, inferred mid-ocean ridge N MAR 15.0833 -45.0000 3000 1988 plume only; 1992 submersible Nautile did not observe active vents
Reykjanes Ridge, Area B active, inferred mid-ocean ridge Reykjanes Ridge 59.8167 -29.6833 1000 1992 submersible Mir did not find vents
EPR, 16 35'S active, inferred mid-ocean ridge S EPR -16.5830 -113.0600 2650 1993 plume only; 1998 submersible Alvin did not confirm activity
CIR, 8-17 S, Segment 2 active, inferred mid-ocean ridge CIR -9.9000 66.7500 4000 2010 plume only
EPR, 27.7 S, Segment W3 active, inferred mid-ocean ridge S EPR -27.7000 -112.9170 2105 1998 plume only
CIR, Segment 3, Hydrothermal Plume Site active, inferred mid-ocean ridge CIR -24.0000 69.6667 2840 1987 plume only; 2005/2006 plume only
EPR, 11 30'N active, inferred mid-ocean ridge N EPR 11.4833 -103.7833 2422 1981 towed camera and plume did not confirm activity; 1988 submersible Alvin dive #1996 (need reference to confirm activity)
EPR, 30.4 S, Segment E2 active, inferred mid-ocean ridge S EPR -30.3750 -111.7640 2320 1998 plume only
EPR, 17 56'S active, inferred mid-ocean ridge S EPR -17.9400 -113.3170 2620 1993 plume only
Seven Sisters active, inferred mid-ocean ridge Kolbeinsey Ridge 71.1500 -12.7900 2200 2012 plume only; 2013 ROV Aglantha (may have confirmed); 2013 plume only
Mohns Ridge, 72 N active, inferred mid-ocean ridge Mohns Ridge 72.0390 -0.2520 2500 1987 plume only; 2013 plume only
GEISEIR site 5, segment K1 active, inferred mid-ocean ridge SEIR -41.2420 81.1580 2860 1996 plume only; 2007 plume only
Atlantis II Deep active, inferred mid-ocean ridge Red Sea 21.3417 38.0750 2200 1965 "confirmed" hot brine and cored seafloor, but see Table 1 in Miller et al. (1966) for historical measurements
GEISEIR site 19, segment L3 active, inferred mid-ocean ridge SEIR -41.8333 87.6266 2400 2009 GEISEIR 1 and 2010 GEISEIR 2 plume only
Gakkel Ridge, Site 6 active, inferred mid-ocean ridge Gakkel Ridge 86.5333 43.0000 3000 2001 plume only
SEIR-WXC12 active, inferred mid-ocean ridge SEIR -50.2500 136.2500 2780 2015 plume only
GEISEIR site 8, segment K3 active, inferred mid-ocean ridge SEIR -41.8833 81.9816 2800 2010 plume only
Su Causeway active, inferred mid-ocean ridge SWIR -38.1000 48.6000 3000 2014 leg 2 or 3 of the 30th Chinese Cruise
Galapagos Rift, 94.4 W active, inferred mid-ocean ridge Galapagos Rift 2.5300 -94.3300 2400 2005 plume only
TaiJi active, inferred mid-ocean ridge S MAR -13.5900 -14.5200 3180 2011 plume only
EPR, 5 S active, inferred mid-ocean ridge S EPR -5.0000 -106.4000 2650 1980's camera tows; 1993 and 1998 plume only; 1998 submersible Alvin did not confirm activity
GEISEIR site 31, segment O1 active, inferred mid-ocean ridge SEIR -46.8956 96.5709 2600 2009 plume only
Mohns Ridge, 72.8 N active, inferred mid-ocean ridge Mohns Ridge 72.8060 4.1650 2300 2013 plume only
S-OH2 active, inferred mid-ocean ridge N MAR 34.0670 -37.4830 3250 2000 or earlier plume only
South Kurchatov active, inferred mid-ocean ridge N MAR 40.4670 -29.5500 2900 1992 plume only; 1995 plume only
EPR, 16 43'S active, inferred mid-ocean ridge S EPR -16.7170 -113.0680 2600 1985/86 or 1989 TV grab (need to check references to confirm activity)
CIR, 8-17 S, Segment 3 active, inferred mid-ocean ridge CIR -10.6600 66.5000 3500 2010 plume only
EPR, 27.9 S, Segment W3 active, inferred mid-ocean ridge S EPR -27.8670 -112.9120 2180 1998 plume only
SWIR, Plume 6 active, inferred mid-ocean ridge SWIR -27.7670 65.1330 3200 1997 plume only
SESCA active, inferred mid-ocean ridge Gorda Ridge 40.7500 -127.5200 3300 1986 sediments and heat-flow measurements
MAR, 7 57'S active, inferred mid-ocean ridge S MAR -7.9500 -13.4420 2600 2001 plume only
EPR, 30.8 S, Segment E2 active, inferred mid-ocean ridge S EPR -30.7500 -111.8770 2360 1998 plume only
CIR, 8-17 S, Segment 4, 11.3 S active, inferred mid-ocean ridge CIR -11.3000 66.4000 3500 2010 plume only
Merian active, inferred mid-ocean ridge S MAR -26.0166 -13.8500 2550 2012 R/V Dayang Yihao; 2013 AUV Abyss plume and side-scan data
GEISEIR site 2, segment J4 active, inferred mid-ocean ridge SEIR -41.2520 79.1030 2800 1996 plume and dredge only
SWIR, D20 active, inferred mid-ocean ridge SWIR -53.0200 22.1880 4170 2000-2001 plume and dredge only
EPR, 21 40'S active, inferred mid-ocean ridge S EPR -21.6340 -114.3010 2730 1987-1988 deposits only
Aden New Century Mountains active, inferred mid-ocean ridge Aden Ridge 12.0833 45.6667 800 2000-2001 plume only
GEISEIR site 20, segment L3 active, inferred mid-ocean ridge SEIR -41.9508 87.8008 2400 2010 plume only
Gakkel Ridge, Site 7 active, inferred mid-ocean ridge Gakkel Ridge 86.9833 55.5000 3800 2001 plume only
SEIR-WXC02 active, inferred mid-ocean ridge SEIR -50.2500 137.0000 2620 2015 plume only
GEISEIR site 9, segment K3 active, inferred mid-ocean ridge SEIR -41.9633 82.0600 2700 2010 plume only
Bai Causeway active, inferred mid-ocean ridge SWIR -37.9000 48.8000 3000 2014 leg 2 or 3 of the 30th Chinese Cruise
Galapagos Rift, 94.7 W active, inferred mid-ocean ridge Galapagos Rift 2.6000 -94.7750 2690 2005 plume only
AMAR active, inferred mid-ocean ridge N MAR 36.3833 -33.6500 2600 1992 plume only; 1994 plume only
Kolbeinsey Ridge, 69 N active, inferred mid-ocean ridge Kolbeinsey Ridge 68.7581 -16.0000 1200 1980 or earlier sediments only
Rainbow Bay active, inferred mid-ocean ridge S MAR -14.0300 -14.3400 2900 2009 towed video did not confirm activity
EPR, 7 S active, inferred mid-ocean ridge S EPR -7.0000 -107.5500 2600 1985/86 or 1989 TV grab
SWIR, 51.7 E active, inferred mid-ocean ridge SWIR -37.4660 51.7320 1595 2008 plume and dredge only
GEISEIR site 32, segment O2 active, inferred mid-ocean ridge SEIR -47.1196 96.8947 2600 2009 plume only
Gorda Ridge, GR-15 active, inferred mid-ocean ridge Gorda Ridge 42.9500 -126.5500 3365 1985 plume only
E Los Huellos Caldera active, inferred mid-ocean ridge Galapagos Rift 0.9500 -90.5300 1600 2005 plume only; 2005 towed video Medea did not confirm activity
CIR, 8-17 S, Segment 4, 10.9 S active, inferred mid-ocean ridge CIR -10.9000 66.7000 3500 2010 plume only
EPR, 28 S, Segment W3 active, inferred mid-ocean ridge S EPR -28.0170 -112.9040 2130 1998 plume only
SWIR, D36 active, inferred mid-ocean ridge SWIR -52.7490 11.7110 3981 2000-2001 plume and dredge only
MAR, 8 10'S active, inferred mid-ocean ridge S MAR -8.1670 -13.4670 2000 2001 plume only
EPR, 11 45'N, OSC active, inferred mid-ocean ridge N EPR 11.7775 -103.8300 2580 1984 Angus camera (or 1985 Argo video) tow with temperature; 1988 submersible Alvin dive #2004 (need reference to confirm activity)
MAR, 11 26'N active, inferred mid-ocean ridge N MAR 11.4482 -43.7035 3835 2009 plume only
EPR, 31.4 S, Segment E4 active, inferred mid-ocean ridge S EPR -31.4330 -111.9670 2350 1998 plume only
GEISEIR site 7, segment K3 active, inferred mid-ocean ridge SEIR -41.8020 81.8380 2540 1996 plume only; 2010 plume only
EPR, 21 54'S active, inferred mid-ocean ridge S EPR -21.9000 -114.5000 2800 1987-1988 deposits only [need to check Fouquet et al. (1993) for confirmation]
Carlsberg Ridge, CR2003 active, inferred mid-ocean ridge Carlsberg Ridge 6.0500 60.9500 3500 2003 plume only; 2007 plume only
GEISEIR site 21, segment L3 active, inferred mid-ocean ridge SEIR -42.0050 87.8808 2400 2010 plume only
Gakkel Ridge, Site 8 active, inferred mid-ocean ridge Gakkel Ridge 86.5333 69.0000 3500 2001 plume only
SEIR-WXC07 active, inferred mid-ocean ridge SEIR -50.2500 138.3000 2420 2015 plume only
GEISEIR site 11, segment K4 active, inferred mid-ocean ridge SEIR -42.5375 82.8266 2600 2010 plume only
North FAMOUS active, inferred mid-ocean ridge N MAR 36.9670 -32.9670 2500 1994 plume only
EPR, 28.3 S, Segment W3 active, inferred mid-ocean ridge S EPR -28.3000 -112.9830 2220 1998 plume only
Magic Mountain, 3-km south active, inferred mid-ocean ridge Explorer Ridge 49.7250 -130.2667 1850 2002 AUV ABE plume only
SWIR, 53.2 E active, inferred mid-ocean ridge SWIR -36.1010 53.2550 2218 2008 plume and dredge only
GEISEIR site 33, segment O2 active, inferred mid-ocean ridge SEIR -47.2383 97.1566 2700 2009 plume only
W Los Huellos Caldera active, inferred mid-ocean ridge Galapagos Rift 1.0000 -90.6000 1600 2005 plume only
Logatchev-3 active, inferred mid-ocean ridge N MAR 14.7083 -44.9667 3100 1993-1999 (between these dates)
EPR, 17 S active, inferred mid-ocean ridge S EPR -17.0000 -113.1170 2680 1993 plume only
CIR, 8-17 S, Segment 4, 11.2 S active, inferred mid-ocean ridge CIR -11.2000 66.5000 3800 2010 plume only
SWIR, D50B active, inferred mid-ocean ridge SWIR -52.4200 12.7480 3913 2000-2001 plume and dredge only
MAR, 11 N active, inferred mid-ocean ridge N MAR 11.0380 -43.6483 4010 1984 plume only; 2009 plume only
Landing Stage active, inferred mid-ocean ridge SWIR -37.5000 51.0000 2300 2014 leg 2 or 3 of the 30th Chinese Cruise
Alarcon Rise/Pescadero intersection active, inferred mid-ocean ridge Gulf of California 23.6423 -108.3948 2384 2015 ROV Doc Ricketts did not confirm activity
MAR, 33 S active, inferred mid-ocean ridge S MAR -32.9676 -14.4517 2600 2013 plume only
GEISEIR site 10, segment K4 active, inferred mid-ocean ridge SEIR -42.4770 82.7100 2500 1996 plume only; 2010 plume only
GEISEIR site 23, segment M2 active, inferred mid-ocean ridge SEIR -42.0272 89.2205 2400 2009 plume only
Gakkel Ridge, 7.5 E active, inferred mid-ocean ridge Gakkel Ridge 85.0167 7.4500 3600 2001 plume only
SEIR-WXC06 active, inferred mid-ocean ridge SEIR -50.2500 138.5500 2400 2015 plume only
GEISEIR site 12, segment K4 active, inferred mid-ocean ridge SEIR -42.6600 83.0366 2600 2010 plume only
S AMAR 1 active, inferred mid-ocean ridge N MAR 36.0830 -34.0830 2630 1992 plume only; 1994 plume only
EPR, 14 18'S active, inferred mid-ocean ridge S EPR -14.3000 -112.6670 2630 1993 plume only
CIR, 8-17 S, Segment 5, 12.25 S active, inferred mid-ocean ridge CIR -12.2500 65.7000 4000 2010 plume only
West Valley active, inferred mid-ocean ridge JdF Ridge 48.4833 -129.0417 3000 1987 and 1988 deposits only (towed camera did not confirm activity)
SWIR, Plume 1, Segment 17 active, inferred mid-ocean ridge SWIR -31.1830 58.5000 3600 1997 plume only
GEISEIR site 34, segment O3 active, inferred mid-ocean ridge SEIR -47.4145 97.4373 2700 2009 plume only
MAR, 27 N active, inferred mid-ocean ridge N MAR 27.0000 -44.5000 2900 1993 plume only
Stockwork active, inferred mid-ocean ridge JdF Ridge 47.9000 -129.1240 2300 2005 submersible Alvin (need publication to determine if confirmed)
GEISEIR site 22, segment L3 active, inferred mid-ocean ridge SEIR -42.1130 88.0420 2400 1996 plume only; 2009 plume only
SWIR, D54 active, inferred mid-ocean ridge SWIR -52.4370 13.3120 4029 2000-2001 plume and dredge only
EPR/Tamayo intersection active, inferred mid-ocean ridge N EPR 22.9333 -108.0667 3200 1979 submersible Alvin did not confirm activity
Kebrit Deep active, inferred mid-ocean ridge Red Sea 24.7233 36.2767 1590 1972 deposits only
EPR, 11 07'N active, inferred mid-ocean ridge N EPR 11.1330 -103.7800 2580 1988 submersible Alvin dive #1989 (need reference to confirm activity); 1991 plume only
Area JX active, inferred mid-ocean ridge CIR -22.9666 69.1833 3500 1986 plume only (camera tow did not confirm)
MAR, 30 S active, inferred mid-ocean ridge S MAR -29.9505 -13.8545 3379 2013 plume only
EPR, 14 35'S active, inferred mid-ocean ridge S EPR -14.5830 -112.6670 2630 1993 plume only
EPR, 8 53'N active, inferred mid-ocean ridge N EPR 8.9000 -104.2000 2580 1991 plume only
GEISEIR site 24, segment M3 active, inferred mid-ocean ridge SEIR -43.0369 91.0357 2400 2009 plume only
Gakkel Ridge, Site 2 active, inferred mid-ocean ridge Gakkel Ridge 83.8500 -2.0000 3900 2001 plume only
GEISEIR site 13, segment L1 active, inferred mid-ocean ridge SEIR -41.0125 86.0608 2800 2010 plume only
Galapagos Rift, 93.7 W active, inferred mid-ocean ridge Galapagos Rift 2.4970 -93.7700 2220 2005 plume only
Chile Triple Junction, 10 km north active, inferred mid-ocean ridge Chile Rise -46.2000 -75.8333 3000 2010 plume only
CIR, 8-17 S, Segment 5, 12.6 S active, inferred mid-ocean ridge CIR -12.6000 66.1000 3800 2010 plume only
SWIR, Plume 2, Segment 16 active, inferred mid-ocean ridge SWIR -31.0670 58.9670 4200 1997 plume only
GEISEIR site 35, segment O3 active, inferred mid-ocean ridge SEIR -47.6179 97.8678 2600 2009 plume only
MAR, 30 N active, inferred mid-ocean ridge N MAR 30.0333 -42.5000 3400 1993 plume only
EPR, 17 42'S active, inferred mid-ocean ridge S EPR -17.7000 -113.2500 2600 1993 plume only
AAR KR1, Mujin active, inferred mid-ocean ridge SEIR -62.1000 158.8000 2100 2011 plume and biological samples
MAR, 28 S active, inferred mid-ocean ridge S MAR -27.7936 -13.3730 3217 2013 plume only
Knipovich Ridge, 75 N active, inferred mid-ocean ridge Knipovich Ridge 74.8000 8.4417 3185 2000 plume only
Walsh active, inferred mid-ocean ridge Mid-Cayman Rise 17.8333 -81.8333 4000 2009 plume only; 2013 plume only
SWIR, D9B active, inferred mid-ocean ridge SWIR -52.7070 18.8170 3931 2000-2001 plume and dredge only
Shaban Deep active, inferred mid-ocean ridge Red Sea 26.2250 35.3500 1540 1983 deposits only
Markov Deep active, inferred mid-ocean ridge N MAR 5.9100 -33.1800 3500 2001-2002 and 2003 dredge only
Pobeda-1 active, inferred mid-ocean ridge N MAR 17.1500 -46.4200 3100 2014/2015 video profiling, TVgrab and corer
Chile Triple Junction active, inferred mid-ocean ridge Chile Rise -46.3000 -75.8000 3000 2010 plume only
CIR, 19 29'S active, inferred mid-ocean ridge CIR -19.4830 65.7330 2700 1988 plume only; 2000 submersible Nautile did not confirm activity
GEISEIR site 25, segment M4 active, inferred mid-ocean ridge SEIR -43.3115 92.1335 2700 2009 plume only
Gakkel Ridge, Site 3 active, inferred mid-ocean ridge Gakkel Ridge 84.4333 2.1333 4300 2001 plume only
GEISEIR site 14, segment L1 active, inferred mid-ocean ridge SEIR -41.0716 86.1550 2700 2010 plume only
AAR KR2 active, inferred mid-ocean ridge SEIR -60.0000 152.5000 3200 2011 plume only
CIR, 8-17 S, Segment 6, 14.3 S active, inferred mid-ocean ridge CIR -14.3000 66.1000 3500 2010 plume only
SWIR, unnamed, Segment 26 active, inferred mid-ocean ridge SWIR -37.6080 50.8527 2800 2008 dredge only DY115-20 Leg 6
GEISEIR site 36, segment O3 active, inferred mid-ocean ridge SEIR -47.7009 98.0631 2700 2009 plume only
EPR, 1 S active, inferred mid-ocean ridge S EPR -0.8000 -102.4600 2800 2005 plume only
Lucky Strike segment, southern end active, inferred mid-ocean ridge N MAR 37.0500 -32.4200 2600 1994 plume only
EPR, 28.4 S, Segment W4 active, inferred mid-ocean ridge S EPR -28.4170 -112.9640 2350 1998 plume only
MAR, 27 S active, inferred mid-ocean ridge S MAR -27.1476 -13.4753 3341 2013 plume only
Knipovich Ridge, 76 48'N active, inferred mid-ocean ridge Knipovich Ridge 76.7833 8.0000 3500 1996 temperature anomaly and towed video did not confirm activity
Wagner Basin active, inferred mid-ocean ridge Gulf of California 31.0666 -114.0833 120 2007 echosounder and grab samples
EPR, 20 S active, inferred mid-ocean ridge S EPR -20.0333 -113.6843 3000 1999 submersible Alvin did not confirm activity
Nereus Deep active, inferred mid-ocean ridge Red Sea 23.1670 37.2830 2400 1972 deposits only
Pacific-Antarctic Ridge, 60 S segment active, inferred mid-ocean ridge Pacific-Antarctic Ridge -60.0000 -152.0000 2300 2009 plume only
SEIR-WXC25 active, inferred mid-ocean ridge SEIR -50.2500 131.9000 3050 2015 plume only
Eye of Mordor Seamount active, inferred mid-ocean ridge Galapagos Rift 1.9410 -91.3100 1555 2005 plume only
EPR, 15 24'S active, inferred mid-ocean ridge S EPR -15.4000 -112.8350 2640 1993 plume only
EPR, 22 30'S active, inferred mid-ocean ridge S EPR -22.5000 -114.3670 2600 1985/86 or 1989 TV grab (need to check references to confirm activity)
GEISEIR site 26, segment M4 active, inferred mid-ocean ridge SEIR -43.6901 92.8451 2500 2009 plume only
Gakkel Ridge, Site 5 active, inferred mid-ocean ridge Gakkel Ridge 86.3500 37.0000 3600 2001 plume only
MAR, 17 S active, inferred mid-ocean ridge S MAR -17.2522 -14.2270 3280 2013 plume only
EPR, 28.7 S, Segment W4 active, inferred mid-ocean ridge S EPR -28.7000 -112.9880 2350 1998 plume only
MAR, 4 02'S active, inferred mid-ocean ridge S MAR -4.0333 -12.2500 4000 2005 plume only
CIR, 8-17 S, Segment 7 active, inferred mid-ocean ridge CIR -17.0000 66.8000 3100 2010 plume only
ET active, inferred mid-ocean ridge JdF Ridge 48.1993 -128.9257 2500 NotProvided
SWIR, D57 active, inferred mid-ocean ridge SWIR -52.2240 13.7380 3517 2000-2001 plume and dredge only
GEISEIR site 37, segment O4 active, inferred mid-ocean ridge SEIR -47.7483 98.1756 2800 2009 plume only
SEIR-WXC22 active, inferred mid-ocean ridge SEIR -50.2500 132.1000 2950 2015 plume only
Alarcon Rise/Tamayo intersection active, inferred mid-ocean ridge Gulf of California 23.2336 -108.6168 2358 2015 ROV Doc Ricketts did not confirm activity
MAR, 23 S active, inferred mid-ocean ridge S MAR -23.7428 -13.3936 2880 2013 plume only
Knipovich Ridge, 77 40'N active, inferred mid-ocean ridge Knipovich Ridge 77.6300 7.5800 3000 2000 plume only
Consag Basin active, inferred mid-ocean ridge Gulf of California 30.6333 -113.9083 140 2007 echosounder and grab samples
Split Seamount active, inferred mid-ocean ridge JdF Ridge 47.6400 -128.9667 2350 1990 camera tow (need reference to check if activity confirmed)
EPR, Manzanillo Spreading Segment active, inferred mid-ocean ridge N EPR 18.2500 -106.3000 2600 1997 plume only
GEISEIR site 15, segment L1 active, inferred mid-ocean ridge SEIR -41.2230 86.3892 2500 2010 plume only
Europa active, inferred mid-ocean ridge Mid-Cayman Rise 18.3500 -81.8500 2400 2009 plume only, not observed on dive with hybrid ROV Nereus
Pacific-Antarctic Ridge, 64 S segment active, inferred mid-ocean ridge Pacific-Antarctic Ridge -64.5000 -170.0000 2300 2009 plume only
N Oceanographer active, inferred mid-ocean ridge N MAR 35.2830 -34.8670 2600 1992 plume only
EPR, 16 08'S active, inferred mid-ocean ridge S EPR -16.1300 -113.0000 2640 1993 plume only
Area EX/FX active, inferred mid-ocean ridge CIR -21.4000 68.7666 3300 1986 plume and sediments
GEISEIR site 27, segment M5 active, inferred mid-ocean ridge SEIR -43.9805 93.4571 2700 2009 plume only
Gakkel Ridge, 85 E active, inferred mid-ocean ridge Gakkel Ridge 85.6500 84.8333 3900 2001 plume only; 2007 towed video did not confirm activity
MAR, 25 S active, inferred mid-ocean ridge S MAR -25.3350 -13.6305 2570 2013 plume only
EPR, 29.5 S, Segment E1 active, inferred mid-ocean ridge S EPR -29.5000 -111.7200 2580 1998 plume only
Carlsberg Ridge, 63 40'E active, inferred mid-ocean ridge Carlsberg Ridge 3.7000 63.6666 3500 2007 plume only
Boomerang Seamount active, inferred mid-ocean ridge SEIR -37.7217 77.8250 850 1996 plume and wax core only
SWIR, D62 active, inferred mid-ocean ridge SWIR -52.2530 15.1030 3990 2000-2001 plume and dredge only
GEISEIR site 38, segment O4 active, inferred mid-ocean ridge SEIR -48.0048 98.8232 2800 2009 plume only
Gorda Ridge, EP96B active, inferred mid-ocean ridge Gorda Ridge 42.5500 -126.8333 3400 1984 deposits only; 1996 plume only
EPR, Seamount 5 active, inferred mid-ocean ridge N EPR 13.0000 -103.5000 1100 1988 or earlier camera and/or submersible (need to check reference)
SEIR-WXC17 active, inferred mid-ocean ridge SEIR -50.3000 133.8000 2780 2015 plume only
MAR, 19 S active, inferred mid-ocean ridge S MAR -19.3301 -11.9421 2707 2013 plume only
Lucky B active, inferred mid-ocean ridge Lena Trough 81.3610 -3.4400 4000 1999 dredging only
EPR, mid 17 N segment active, inferred mid-ocean ridge N EPR 17.0000 -105.3800 2750 1997 plume only
Discovery Deep active, inferred mid-ocean ridge Red Sea 21.2830 38.0500 2100 1965 "confirmed" hot brine and cored seafloor, but see Table 1 in Miller et al. (1966) for historical measurements
Tevnia active, inferred mid-ocean ridge N EPR 10.3333 -103.5533 2925 1994 submersible Alvin did not confirm activity
GEISEIR site 16, segment L3 active, inferred mid-ocean ridge SEIR -41.5883 87.2615 2500 2010 plume only
W Eye of Mordor inactive mid-ocean ridge Galapagos Rift 1.9707 -91.3900 1600 2005 towed video Medea observed inactive chimneys
MAR, 24 20'N inactive mid-ocean ridge N MAR 24.3500 -46.2000 3200 NotProvided
EPR 87D1 Seamount inactive mid-ocean ridge N EPR 11.5333 -103.8600 2090 NotProvided
MAR, 24 30'N inactive mid-ocean ridge N MAR 24.5000 -46.1533 3900 1987 deposits only
Hess Deep inactive mid-ocean ridge Galapagos Rift 2.2500 -101.5000 5100 NotProvided
Brown Bear Seamount inactive mid-ocean ridge JdF Ridge 46.0333 -130.5500 1500 NotProvided
Galapagos Rift, 85 50'W inactive mid-ocean ridge Galapagos Rift 0.7500 -85.8333 2600 1988 or earlier submersible observations
Krasnov inactive mid-ocean ridge N MAR 16.6400 -46.4750 3900 2002 or earlier plume only; 2004 TV grab indicated inactive; 2007 ROV Victor indicated inactive
Ashadze-3 inactive mid-ocean ridge N MAR 12.9860 -44.8610 4200 2005 plume and dredge only
Logatchev-5 inactive mid-ocean ridge N MAR 14.7500 -44.9700 3100 2007 ROV VICTOR 6000 did not find hydrothermal activity
Guaymas Basin, Northern Trough inactive mid-ocean ridge Gulf of California 27.3050 -111.5067 2000 1977 submersible Seacliff (hydrothermal deposits only)
Zenith-Victory inactive mid-ocean ridge N MAR 20.1292 -45.6225 2390 2008 (need citation to confirm that the field was discovered by TV-profiling and dredging)
Galapagos Rift, 95 W inactive mid-ocean ridge Galapagos Rift 2.5000 -95.1667 2600 NotProvided
Squid Forest inactive mid-ocean ridge Kolbeinsey Ridge 68.0000 -17.5000 900 1999 ROV Aglantha
Petersburgskoe inactive mid-ocean ridge N MAR 19.8666 -45.8666 3100 2010 dredging only
MAR, 25 50'N inactive mid-ocean ridge N MAR 25.8083 -44.9833 3000 NotProvided
EPR, 13 N, SE Seamount inactive mid-ocean ridge N EPR 12.7000 -103.8600 2500 1981 towed camera, dredging, and plume did not confirm activity; 1982 and 1984 submersible Cyana did not confirm activity
EPR, 14 N seamount inactive mid-ocean ridge N EPR 14.1500 -104.3667 2600 NotProvided
Owen transform fault inactive mid-ocean ridge Carlsberg Ridge 9.8333 57.9500 4500 NotProvided
MAR, 12 48'N inactive mid-ocean ridge N MAR 12.8000 -44.7883 2400 NotProvided
Carlsberg Ridge, 1.67 S inactive mid-ocean ridge Carlsberg Ridge -1.6768 67.7700 4500 NotProvided
Dellwood Seamount inactive mid-ocean ridge Explorer Ridge 50.7470 -130.8961 800 1974 or earlier deposits only; 2018 ROV Hercules inactive
DSDP Hole 504B inactive mid-ocean ridge Galapagos Rift 1.2267 -83.7300 3500 NotProvided
Green Seamount inactive mid-ocean ridge N EPR 20.8033 -109.2833 2000 1982 submersible Alvin observed only inactive
MESO Zone inactive mid-ocean ridge CIR -23.3927 69.2422 2850 1993 TV grab and water column measurements
Explorer Deep inactive mid-ocean ridge Explorer Ridge 50.1000 -129.7500 3200 1969, deposits only
Ashadze-4 inactive mid-ocean ridge N MAR 12.9700 -44.8500 4530 2007 ROV VICTOR 6000 did not find hydrothermal activity
SEIR inactive mid-ocean ridge SEIR -28.0614 74.1733 5000 NotProvided
Romanche Fracture Zone inactive mid-ocean ridge S MAR -0.9767 -24.5133 3100 NotProvided
MAR, 15 50'N inactive mid-ocean ridge N MAR 15.8667 -46.6667 3000 NotProvided
Gorda Ridge, 41 30'N inactive mid-ocean ridge Gorda Ridge 41.5167 -127.4500 3350 1984 deposits only
MAR, 22 30'N inactive mid-ocean ridge N MAR 22.5000 -45.0050 2800 NotProvided
Logatchev-4 inactive mid-ocean ridge N MAR 14.7063 -44.9083 2000 2004 TV sled observed inactive field [ROV QUEST was also on this cruise, but Kuhn et al. (2004) do not report its use at Logatchev-4]
E Eye of Mordor inactive mid-ocean ridge Galapagos Rift 1.9058 -91.2310 1600 2005 towed video Medea found inactive chimneys
MAR, 16 46'N inactive mid-ocean ridge N MAR 16.7950 -46.3800 3300 NotProvided
Mount Jourdanne inactive mid-ocean ridge SWIR -27.8500 63.9333 2940 1998 submersible Shinkai 6500
MAR, 23 35'N inactive mid-ocean ridge N MAR 23.5833 -45.0000 3500 1980 submersible Alvin did not observe hydrothermal activity
Jade Emperor Mountain inactive mid-ocean ridge SWIR -37.9400 49.2600 1500 2010 video sled, plume survey, and geological sampling all suggest inactive
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