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active, inferred

Below is the subset of Vent Fields that contain the Activity, Tectonic Setting, Region, Ocean, or National Jurisdiction listed above.
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Vent Field Name IDsort icon Activity Tectonic Setting Region Latitude Longitude Maximum or Single Reported Depth Year and How Discovered
94SO2 active, inferred back-arc spreading center New Hebrides back-arc -19.4000 169.9000 980 1994 towed camera with temperature did not confirm activity
Aden New Century Mountains active, inferred mid-ocean ridge Tadjoura Rift, western Gulf of Aden 12.0833 45.6667 800 2000-2001 plume only
Ahyi active, inferred arc volcano Mariana Arc 20.4200 145.0300 60 2003 plume only
AMAR active, inferred mid-ocean ridge N MAR 36.3833 -33.6500 2600 1992 plume only; 1994 plume only
Ashadze 3 active, inferred mid-ocean ridge N MAR 12.9860 -44.8610 4200 2005 plume and dredge only
Atlantis II Deep active, inferred mid-ocean ridge Red Sea 21.3670 38.0830 2200 1965 "confirmed" hot brine and cored seafloor, but see Table 1 in Miller et al. (1966) for historical measurements
Bataan active, inferred arc volcano Luzon/Bicol Arc 20.0000 122.0000 2002 or earlier some indications of activity
Bayonnaise Knoll caldera active, inferred back-arc spreading center Izu-Bonin back-arc 31.9667 139.7333 800 2003 temperature anomalies, but camera survey observed inactive vent deposits
Boomerang Seamount active, inferred mid-ocean ridge SEIR -37.7217 77.8250 850 1996 plume and wax core only
C-ELSC, plume 13 active, inferred back-arc spreading center Lau Basin -21.4150 -176.3720 2100 2004 plume only
C-ELSC, plume 14 active, inferred back-arc spreading center Lau Basin -21.3200 -176.3640 2100 2004 plume only
C-ELSC, plume 15 active, inferred back-arc spreading center Lau Basin -21.2700 -176.3470 2230 2004 plume only
C-ELSC, plume 17 active, inferred back-arc spreading center Lau Basin -20.9900 -176.2530 2270 2004 plume only
C-ELSC, plume 18 active, inferred back-arc spreading center Lau Basin -20.9500 -176.2390 2230 2004 plume only
C-ELSC, plume 19 active, inferred back-arc spreading center Lau Basin -20.8700 -176.2170 2230 2004 plume only
C-ELSC, unnamed active, inferred back-arc spreading center Lau Basin -21.1070 -176.2920 2300 2004 (assume submersible Shinkai 6500); 2004 plume only on previous cruise
Carlsberg Ridge, CR2003 active, inferred mid-ocean ridge Carlsberg Ridge 6.0500 60.9500 3500 2003 plume only; 2007 plume only
Central Andaman Trough, rift valley, dredges 9 and 10 active, inferred back-arc spreading center Andaman Basin 10.4166 94.1666 3350 1994 deposits only
Central Andaman Trough, seamount crater, dredge 6 active, inferred back-arc spreading center Andaman Basin 10.0000 94.0000 1640 1994 deposits only
Central Spreading Ridge, Station 19 S active, inferred back-arc spreading center North Fiji Basin -19.0000 173.5000 3000 1991 submersible Shinkai 6500 did not confirm activity
Chamorro volcano active, inferred arc volcano Mariana Arc 20.8100 144.7050 875 2003 plume only
Chile Rise, Segment N8 active, inferred mid-ocean ridge Chile Rise -38.7167 -91.5667 3330 1998 plume only
Chile Rise, Segment N9A active, inferred mid-ocean ridge Chile Rise -39.0500 -91.5833 3450 1998 plume only
Chile Triple Junction active, inferred mid-ocean ridge Chile Rise -46.3000 -75.8000 3000 2010 plume only
Chile Triple Junction, 10 km north active, inferred mid-ocean ridge Chile Rise -46.2000 -75.8333 3000 2010 plume only
Cioan active, inferred arc volcano New Hebrides Arc -16.6870 168.4000 300 2001 plume and inconclusive camera tow
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
CIR, northern active, inferred mid-ocean ridge CIR -14.7000 66.2500 3400 2010 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
CLSC, CL_7 active, inferred back-arc spreading center Lau Basin -18.1333 -176.3667 2250 2009 plume only
CLSC, CL_8 active, inferred back-arc spreading center Lau Basin -18.0500 -176.3333 2250 2009 plume only
CLSC, northern plumes on CL6 active, inferred back-arc spreading center Lau Basin -18.1333 -176.2833 2250 2009 plume only
CLSC, plumes on CL1 active, inferred back-arc spreading center Lau Basin -17.8667 -176.3833 2250 2009 plume only
CLSC, southern plumes on CL6 active, inferred back-arc spreading center Lau Basin -18.5000 -176.3833 2250 2009 plume only
Consag Basin active, inferred mid-ocean ridge Gulf of California 30.6333 -113.9083 140 2007 echosounder and grab samples
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
Douglas Strait caldera, Thule Island, South Sandwich Islands active, inferred arc volcano South Sandwich Arc -59.4167 -27.3333 625 2009 plume only; 2008 or earlier high resolution bathymetry only
Dugong submarine volcano active, inferred back-arc spreading center Lau Basin -15.4500 -175.7800 1170 2008 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
East Mata submarine volcano active, inferred arc volcano Tonga Arc -15.0833 -173.6667 1300 2008 plume only; 2009 plume only
Edison Seamount active, inferred arc volcano Tabar-Feni Arc -3.3100 152.5800 1450 1994 and 1998 TV grab sampling did not confirm hydrothermal activity
ELSC3 active, inferred back-arc spreading center Lau Basin -21.1667 -176.3333 2140 2009 plume only
Enarete Seamount active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 38.6250 14.0000 600 1976 Fe crusts only; 1997 manganese crust only; 2007 plume only
Eolo Seamount active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 38.5800 14.1667 800 1976 Fe crusts only; 2007 plume only
EPR, 1 S active, inferred mid-ocean ridge S EPR -0.8000 -102.4600 2800 2005 plume only
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)
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, 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
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, 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)
EPR, 14 18'S active, inferred mid-ocean ridge S EPR -14.3000 -112.6670 2630 1993 plume only
EPR, 14 35'S active, inferred mid-ocean ridge S EPR -14.5830 -112.6670 2630 1993 plume only
EPR, 15 24'S active, inferred mid-ocean ridge S EPR -15.4000 -112.8350 2640 1993 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
EPR, 16 08'S active, inferred mid-ocean ridge S EPR -16.1300 -113.0000 2640 1993 plume only
EPR, 16 24'S active, inferred mid-ocean ridge S EPR -16.4000 -113.0500 2640 1993 plume only
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
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)
EPR, 17 42'S active, inferred mid-ocean ridge S EPR -17.7000 -113.2500 2600 1993 plume only
EPR, 17 47'S active, inferred mid-ocean ridge S EPR -17.7900 -113.3000 2600 1993 plume only
EPR, 17 53'S active, inferred mid-ocean ridge S EPR -17.8800 -113.3000 2610 1993 plume only
EPR, 17 56'S active, inferred mid-ocean ridge S EPR -17.9400 -113.3170 2620 1993 plume only
EPR, 17 S active, inferred mid-ocean ridge S EPR -17.0000 -113.1170 2680 1993 plume only
EPR, 2 S, off-axis active, inferred mid-ocean ridge S EPR -2.0840 -102.8270 3000 2008 plume only
EPR, 20 S active, inferred mid-ocean ridge S EPR -20.0333 -113.6843 3000 1999 submersible Alvin did not confirm activity
EPR, 21 20'S active, inferred mid-ocean ridge S EPR -21.3670 -114.2570 2900 1981 plume only; 1987-1988 deposits only
EPR, 21 40'S active, inferred mid-ocean ridge S EPR -21.6340 -114.3010 2730 1987-1988 deposits 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]
EPR, 22 30'S active, inferred mid-ocean ridge S EPR -22.5000 -114.3670 2600 1992 or earlier [need to check Dill et al. (1992) for confirmation]
EPR, 27.7 S, Segment W3 active, inferred mid-ocean ridge S EPR -27.7000 -112.9170 2105 1998 plume only
EPR, 27.9 S, Segment W3 active, inferred mid-ocean ridge S EPR -27.8670 -112.9120 2180 1998 plume only
EPR, 28 S, Segment W3 active, inferred mid-ocean ridge S EPR -28.0170 -112.9040 2130 1998 plume only
EPR, 28.3 S, Segment W3 active, inferred mid-ocean ridge S EPR -28.3000 -112.9830 2220 1998 plume only
EPR, 28.4 S, Segment W4 active, inferred mid-ocean ridge S EPR -28.4170 -112.9640 2350 1998 plume only
EPR, 28.7 S, Segment W4 active, inferred mid-ocean ridge S EPR -28.7000 -112.9880 2350 1998 plume only
EPR, 29.5 S, Segment E1 active, inferred mid-ocean ridge S EPR -29.5000 -111.7200 2580 1998 plume only
EPR, 29.8 S, Segment E1 active, inferred mid-ocean ridge S EPR -29.8000 -111.7300 2580 1998 plume only
EPR, 30.1 S, Segment E1 active, inferred mid-ocean ridge S EPR -30.1330 -111.7640 2480 1998 plume only
EPR, 30.4 S, Segment E2 active, inferred mid-ocean ridge S EPR -30.3750 -111.7640 2320 1998 plume only
EPR, 30.8 S, Segment E2 active, inferred mid-ocean ridge S EPR -30.7500 -111.8770 2360 1998 plume only
EPR, 31.4 S, Segment E4 active, inferred mid-ocean ridge S EPR -31.4330 -111.9670 2350 1998 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
EPR, 7 S active, inferred mid-ocean ridge S EPR -7.0000 -107.5500 2600 1992 or earlier (need to check reference to confirm)
EPR, 8 53'N active, inferred mid-ocean ridge N EPR 8.9000 -104.2000 2580 1991 plume only
EPR, Manzanillo Spreading Segment active, inferred mid-ocean ridge N EPR 18.2500 -106.3000 2600 1997 plume only
EPR, mid 17 N segment active, inferred mid-ocean ridge N EPR 17.0000 -105.3800 2750 1997 plume only
EPR, northern 17 N segment active, inferred mid-ocean ridge N EPR 17.6700 -105.0050 2800 1997 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)
EPR, southern 16 N segment active, inferred mid-ocean ridge N EPR 15.5000 -105.4000 2300 1997 plume only
EPR, southern 17 N segment active, inferred mid-ocean ridge N EPR 16.5800 -105.3000 2700 1997 plume only
EPR/Tamayo intersection active, inferred mid-ocean ridge N EPR 22.9333 -108.0667 3200 1979 submersible Alvin did not confirm activity
ESR, E5 active, inferred back-arc spreading center East Scotia Ridge -57.5000 -30.2000 3000 1999 plume only
ET active, inferred mid-ocean ridge JdF Ridge 48.1993 -128.9257 2500 NotProvided
Eva active, inferred arc volcano New Hebrides Arc -22.0000 170.7500 1600 2008 plume only
EX/FX Zone active, inferred mid-ocean ridge CIR -21.5000 68.4200 3000 1987 or earlier plume and deposits only
Extensional Relay Zone A active, inferred back-arc spreading center North Fiji Basin -16.1667 177.4167 2335 1999 towed camera did not confirm activity
Eye of Mordor Seamount active, inferred mid-ocean ridge Galapagos Rift 1.9410 -91.3100 1555 2005 plume only
FRSC, Central active, inferred back-arc spreading center Lau Basin -16.4917 -174.5417 2419 2004 plume only
FRSC, RC 129 and CTD 24 plume sites active, inferred back-arc spreading center Lau Basin -17.0250 -174.5017 1650 2004 plume only; 2004 dredging
FRSC, South Central active, inferred back-arc spreading center Lau Basin -16.6667 -174.5167 1820 2004 plume only; 2006 plume and chimney samples; 2009 camera tow and sampling (activity not confirmed)
Fukujin volcano active, inferred arc volcano Mariana Arc 21.9300 143.4700 1100 1987 deposits only
Gakkel Ridge, 7.5 E active, inferred mid-ocean ridge Gakkel Ridge 85.0167 7.4500 3600 2001 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
Gakkel Ridge, Site 2 active, inferred mid-ocean ridge Gakkel Ridge 83.8500 -2.0000 3900 2001 plume only
Gakkel Ridge, Site 3 active, inferred mid-ocean ridge Gakkel Ridge 84.4333 2.1333 4300 2001 plume only
Gakkel Ridge, Site 5 active, inferred mid-ocean ridge Gakkel Ridge 86.3500 37.0000 3600 2001 plume only
Gakkel Ridge, Site 6 active, inferred mid-ocean ridge Gakkel Ridge 86.5333 43.0000 3000 2001 plume only
Gakkel Ridge, Site 7 active, inferred mid-ocean ridge Gakkel Ridge 86.9833 55.5000 3800 2001 plume only
Gakkel Ridge, Site 8 active, inferred mid-ocean ridge Gakkel Ridge 86.5333 69.0000 3500 2001 plume only
Galapagos Rift, 93.7 W active, inferred mid-ocean ridge Galapagos Rift 2.4970 -93.7700 2220 2005 plume only
Galapagos Rift, 94.4 W active, inferred mid-ocean ridge Galapagos Rift 2.5300 -94.3300 2400 2005 plume only
Galapagos Rift, 94.7 W active, inferred mid-ocean ridge Galapagos Rift 2.6000 -94.7750 2690 2005 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
Gamble volcanic center active, inferred arc volcano Kermadec Arc -27.2000 -177.4100 250 2004 plume and dredging NZAPLUME III expedition
Gemini-Oscostar Volcanic Complex active, inferred arc volcano New Hebrides Arc -20.9830 170.2830 100 2004 plume and sulfide samples
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
Gorda Ridge, EP96B active, inferred mid-ocean ridge Gorda Ridge 42.5500 -126.8333 3400 1984 deposits only; 1996 plume only
Gorda Ridge, GR-15 active, inferred mid-ocean ridge Gorda Ridge 42.9500 -126.5500 3365 1985 plume only
Haungaroa active, inferred arc volcano Kermadec Arc -32.6060 -179.6090 1165 2002 plume only
Havre active, inferred arc volcano Kermadec Arc -31.0970 -179.0340 1505 2002 plume only
Hinepuia volcanic center active, inferred arc volcano Kermadec Arc -26.3900 -177.2600 300 2004 plume and dredging NZAPLUME III expedition
Hinetapeka volcanic center active, inferred arc volcano Kermadec Arc -28.5900 -177.8200 300 2004 plume and dredging NZAPLUME III expedition
Kana Keoki seamount active, inferred arc volcano Solomons Arc -8.7500 157.0300 650 1993 observations did not confirm activity
Kavachi submarine volcano active, inferred arc volcano Solomons Arc -8.9833 157.9667 500 2000 plume only
Kebrit Deep active, inferred mid-ocean ridge Red Sea 24.7233 36.2767 1590 1972 deposits only
Kermadec Arc, Volcano L active, inferred arc volcano Kermadec Arc -30.0000 -178.7500 200 2002 CTDO with attached discrete water sampling capability
Kibblewhite active, inferred arc volcano Kermadec Arc -34.5750 179.2550 1106 2002 plume only
Kings Triple Junction active, inferred back-arc spreading center Lau Basin -15.3333 -174.6667 2100 1986 PAPATUA Expedition (need to check references to confirm activity)
Knipovich Ridge, 75 N active, inferred mid-ocean ridge Knipovich Ridge 74.8000 8.4417 3185 2000 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
Knipovich Ridge, 77 40'N active, inferred mid-ocean ridge Knipovich Ridge 77.6300 7.5800 3000 2000 plume only
Kolbeinsey Ridge, 69 N active, inferred mid-ocean ridge Kolbeinsey Ridge 68.7581 -16.0000 1200 1980 or earlier sediments only
Komba-ridge active, inferred arc volcano Banda Arc -7.9800 123.8000 1000 2001 CTD temperature anomaly and dredged sulfides
Kos, south active, inferred arc volcano Hellenic Arc, Aegean Sea 36.6667 27.2500 450 1997 plume only
Krakatau active, inferred arc volcano Banda Arc -6.1020 105.4230 250 2002 CTD/transmissometer and dredge only
Kuiwai active, inferred arc volcano Kermadec Arc -33.1560 -179.9560 630 2002 plume only
Kuwae submarine caldera active, inferred arc volcano New Hebrides Arc -16.8170 168.5000 464 2001 plume and inconclusive grab samples
Leyte active, inferred arc volcano Luzon/Bicol Arc 11.0000 125.0000 2002 or earlier some indications of activity
Little Volcano active, inferred back-arc spreading center Bransfield Strait -62.7500 -59.2500 1500 1995 plume only
Lobster active, inferred back-arc spreading center Lau Basin -15.0000 -176.0000 1500 2008 plume and dredge only
Logatchev 3 active, inferred mid-ocean ridge N MAR 14.7083 -44.9667 3100 1993-1999 (between these dates)
Lucky B active, inferred mid-ocean ridge Lena Trough 81.3610 -3.4400 4000 1999 dredging only
Lucky Strike segment, southern end active, inferred mid-ocean ridge N MAR 37.0500 -32.4200 2600 1994 plume only
Magic Mountain, 3-km south active, inferred mid-ocean ridge Explorer Ridge 49.7250 -130.2667 1850 2002 AUV ABE plume only
Makhahnas active, inferred arc volcano Mariana Arc 20.5300 144.8833 420 2003 no plume detected
MAR, 11 26'N active, inferred mid-ocean ridge N MAR 11.4482 -43.7035 3835 2009 plume only
MAR, 11 N active, inferred mid-ocean ridge N MAR 11.0380 -43.6483 4010 1984 plume only; 2009 plume only
MAR, 13 19'N OCC active, inferred mid-ocean ridge N MAR 13.3333 -44.9000 3000 2007 dredge 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
MAR, 27 N active, inferred mid-ocean ridge N MAR 27.0000 -44.5000 2900 1993 plume only
MAR, 30 N active, inferred mid-ocean ridge N MAR 30.0333 -42.5000 3400 1993 plume only
MAR, 43 N active, inferred mid-ocean ridge N MAR 43.0000 -29.0000 3400 1986 or earlier plume only
MAR, 7 57'S active, inferred mid-ocean ridge S MAR -7.9500 -13.4420 2600 2001 plume only
MAR, 8 10'S active, inferred mid-ocean ridge S MAR -8.1670 -13.4670 2000 2001 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
Mariana Trough, plume 2 active, inferred back-arc spreading center Mariana Trough 12.7600 143.4800 2880 2003 plume only
Markov Deep active, inferred mid-ocean ridge N MAR 5.9100 -33.1800 3500 2001-2002 and 2003 dredge only
Mata Fa active, inferred arc volcano Tonga Arc -14.9833 -173.8000 2315 2010 plume only
Mata Ono active, inferred arc volcano Tonga Arc -14.9333 -173.7916 2370 2010 plume only
Mata Taha active, inferred arc volcano Tonga Arc -15.0416 -173.7833 2160 2010 plume only
Mata Ua active, inferred arc volcano Tonga Arc -15.0166 -173.7833 2105 2010 plume only (towed camera did not confirm)
Momoko active, inferred back-arc spreading center Lau Basin -22.6400 -176.7210 2180 1989 submersible Nautile
Monowai Cone active, inferred arc volcano Tonga Arc -25.8870 -177.1880 150 1998 or earlier [need to check Stoffers et al. (1999) for confirmation]; 2004 plume only
Myojinsho Caldera active, inferred arc volcano Izu-Bonin Arc 31.8833 139.9500 1110 1988 deposits only; 2005 plume only
N Oceanographer active, inferred mid-ocean ridge N MAR 35.2830 -34.8670 2600 1992 plume only
N-ELSC, plume 22 active, inferred back-arc spreading center Lau Basin -20.4000 -176.1580 2700 2004 plume only
N-ELSC, plume 25 active, inferred back-arc spreading center Lau Basin -19.8900 -176.0640 2680 2004 plume only
N-ELSC, plume 26 active, inferred back-arc spreading center Lau Basin -19.8200 -176.0420 2600 2004 plume only
N-ELSC, plume 27 active, inferred back-arc spreading center Lau Basin -19.7500 -176.0190 2570 2004 plume only; 2009 plume only
N-ELSC, plume 28 active, inferred back-arc spreading center Lau Basin -19.6500 -175.9890 2550 2004 plume only
N-ELSC, plume 29 active, inferred back-arc spreading center Lau Basin -19.6000 -175.9750 2700 2004 plume only
Naung active, inferred arc volcano Sangihe Arc 3.7791 125.3750 600 2001 dredge only, 2003 CTD only
NE Anatahan submarine volcano active, inferred arc volcano Mariana Arc 16.3333 145.6667 460 2003 multibeam and sidescan sonar only
near Jade Emperor Mountain, on-axis active, inferred mid-ocean ridge SWIR -37.8666 49.2166 3000 2010 plume only
NELCO active, inferred back-arc spreading center Lau Basin -15.4167 -174.0196 1635 2008 commercial ROV (report does not confirm activity); 2003 plume only; 2004 dredging (SS11/2004 cruise); 2005 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
Nereus Deep active, inferred mid-ocean ridge Red Sea 23.1670 37.2830 2400 1972 deposits only
New Hebrides Arc, Volcano A active, inferred arc volcano New Hebrides Arc -16.6667 168.3667 450 1974 sediment grab samples only; note: 1984 USGS cruise included video - need to check Greene and Exon (1988)
New World Seamount active, inferred arc volcano Tabar-Feni Arc -2.8333 152.5333 1200 2000 or earlier (cruise FR04/00 implies that they already suspected hydrothermal activity); 1994 seamount discovered
Ngatoroirangi active, inferred arc volcano Kermadec Arc -33.7310 179.8250 467 2002 plume only
Nishinoshima Island active, inferred arc volcano Izu-Bonin Arc 27.2367 140.8783 5 1975 SCUBA
North FAMOUS active, inferred mid-ocean ridge N MAR 36.9670 -32.9670 2500 1994 plume only
northern caldera, NWLSC active, inferred back-arc spreading center Lau Basin -15.8000 -177.4000 2300 2008 plume and dredge only
Okinawa Trough, Site ES1 active, inferred back-arc spreading center Okinawa Trough 30.3303 129.0827 521 1992 dredge only
Okinawa Trough, Site ES2 active, inferred back-arc spreading center Okinawa Trough 28.8137 128.1028 779 1992 dredge only
Pacific-Antarctic Ridge, 60 S segment active, inferred mid-ocean ridge Pacific-Antarctic Ridge -60.0000 -152.0000 2300 2009 plume only
Pacific-Antarctic Ridge, 64 S segment active, inferred mid-ocean ridge Pacific-Antarctic Ridge -64.5000 -170.0000 2300 2009 plume only
Peggy Ridge active, inferred back-arc spreading center Lau Basin -16.9233 -176.8250 1900 1975 or earlier rock samples only; inactive in systematic survey on Arculus cruise SS07/2008
Putoto volcanic center active, inferred arc volcano Kermadec Arc -27.6800 -177.6100 700 2004 plume and dredging NZAPLUME III expedition
Puy des Folles active, inferred mid-ocean ridge N MAR 20.5083 -45.6417 2000 1996 submersible Nautile observed only inactive vents
Rainbow Bay active, inferred mid-ocean ridge S MAR -14.0300 -14.3400 2900 2009 towed video did not confirm activity
Rakahore volcanic center active, inferred arc volcano Kermadec Arc -26.8100 -177.4000 1200 2004 plume and dredging NZAPLUME III expedition
Red Sea Rift, 18 N active, inferred mid-ocean ridge Red Sea 17.9667 40.0667 1500 1980 submersible Pisces XI (deposits only)
Reykjanes Ridge, Area A active, inferred mid-ocean ridge N MAR, Reykjanes Ridge 62.4500 -25.4330 500 NotProvided
Reykjanes Ridge, Area B active, inferred mid-ocean ridge N MAR, Reykjanes Ridge 59.8167 -29.6833 1000 1992 submersible Mir did not find vents
Rumble II volcanic center, Rumble II West active, inferred arc volcano Kermadec Arc -35.3600 178.5170 1500 1996 dredging only; 1999 plume only
S AMAR 1 active, inferred mid-ocean ridge N MAR 36.0830 -34.0830 2630 1992 plume only; 1994 plume only
S AMAR 2 active, inferred mid-ocean ridge N MAR 35.9670 -34.1830 2240 1992 plume only; 1994 plume only
S Oceanographer active, inferred mid-ocean ridge N MAR 34.8670 -36.4330 3460 1992 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
S-OH2 active, inferred mid-ocean ridge N MAR 34.0670 -37.4830 3250 2000 or earlier plume only
San Cristobal arc, Target M active, inferred arc volcano Solomons Arc -10.4000 164.7500 2000 2002 plume and dredge only
San Cristobal arc, Target N active, inferred arc volcano Solomons Arc -10.5000 164.0000 2000 2002 dredge only
seamount, Tikopia area active, inferred arc volcano New Hebrides Arc -12.5433 167.7883 1425 1991 submersible Cyana
Secca del Capo active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 14.8500 38.6333 240 1995 ROV Comex deposits only; 2007 plume only
SEIR, 01 active, inferred mid-ocean ridge SEIR -42.1130 88.0420 2400 1996 plume only
SEIR, 08A active, inferred mid-ocean ridge SEIR -42.4770 82.7100 2500 1996 plume only
SEIR, 10 active, inferred mid-ocean ridge SEIR -41.8020 81.8380 2540 1996 plume only
SEIR, 13 active, inferred mid-ocean ridge SEIR -41.2420 81.1580 2860 1996 plume only
SEIR, 16 active, inferred mid-ocean ridge SEIR -41.7720 79.7530 2800 1996 plume only
SEIR, 21 active, inferred mid-ocean ridge SEIR -41.2520 79.1030 2800 1996 plume and dredge only
SEIR, 41, near St. Paul Island active, inferred mid-ocean ridge SEIR -39.4400 78.0920 2270 1996 plume only
SESCA active, inferred mid-ocean ridge Gorda Ridge 40.7500 -127.5200 3300 1986 sediments and heat-flow measurements
Shaban Deep active, inferred mid-ocean ridge Red Sea 26.2250 35.3500 1540 1983 deposits only
Sisifo active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 38.7833 13.8666 1200 2007 plume only
Solwara 16 active, inferred back-arc spreading center Manus Basin -3.4380 149.9670 2163 2009 commercial ROV Fugro FV300 (activity not confirmed)
Solwara 18 active, inferred back-arc spreading center Manus Basin -3.0760 147.2390 1308 2008 plumes with some sites subsequently observed with ROV; 2009 commercial ROV Fugro FV300 (activity not confirmed)
Solwara 19 active, inferred back-arc spreading center Manus Basin -3.6660 148.7640 1039 2009 commercial ROV Fugro FV300 (activity not confirmed)
Sonne active, inferred arc volcano Kermadec Arc -34.0580 179.5890 1127 2002 plume only
South Kurchatov active, inferred mid-ocean ridge N MAR 40.4670 -29.5500 2900 1992 plume only; 1995 plume only
Split Seamount active, inferred mid-ocean ridge JdF Ridge 47.6400 -128.9667 2350 1990 camera tow (need reference to check if activity confirmed)
St. Petersburg active, inferred mid-ocean ridge N MAR 19.8666 -45.8666 3400 2010 dredging only
Starfish Seamount active, inferred arc volcano New Hebrides Arc -12.2083 167.6462 1600 1989 plume only; 1989 towed camera survey did not confirm activity; 2002 plume and dredge only
Station 58, N160 Axis active, inferred back-arc spreading center North Fiji Basin -16.3167 173.5500 3900 1985 plume only; 1991 temperature anomalies but submersible Shinkai 6500 did not confirm activity
Stromboli active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 38.7890 15.2130 250 1969 Fe crusts only
Suakin Deep active, inferred mid-ocean ridge Red Sea 19.6333 38.7333 2850 1972 deposits only
Sumisu Rift active, inferred back-arc spreading center Izu-Bonin back-arc 31.1000 139.8917 1600 1987 submersible Alvin inactive chimneys only
SW Syoyo active, inferred arc volcano Mariana Arc 22.3870 142.7620 1750 2003 plume only
SWIR, 51.7 E active, inferred mid-ocean ridge SWIR -37.4660 51.7320 1595 2008 plume and dredge only
SWIR, 53.2 E active, inferred mid-ocean ridge SWIR -36.1010 53.2550 2218 2008 plume and dredge only
SWIR, 63.5 E active, inferred mid-ocean ridge SWIR -27.9507 63.5414 3666 2009 DY115-20 Leg 7 (need reference to confirm activity)
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)
SWIR, D20 active, inferred mid-ocean ridge SWIR -53.0200 22.1880 4170 2000-2001 plume and dredge only
SWIR, D36 active, inferred mid-ocean ridge SWIR -52.7490 11.7110 3981 2000-2001 plume and dredge only
SWIR, D50B active, inferred mid-ocean ridge SWIR -52.4200 12.7480 3913 2000-2001 plume and dredge only
SWIR, D54 active, inferred mid-ocean ridge SWIR -52.4370 13.3120 4029 2000-2001 plume and dredge only
SWIR, D57 active, inferred mid-ocean ridge SWIR -52.2240 13.7380 3517 2000-2001 plume and dredge only
SWIR, D62 active, inferred mid-ocean ridge SWIR -52.2530 15.1030 3990 2000-2001 plume and dredge only
SWIR, D82 active, inferred mid-ocean ridge SWIR -52.2080 15.5830 4100 2000-2001 plume only
SWIR, D9B active, inferred mid-ocean ridge SWIR -52.7070 18.8170 3931 2000-2001 plume and dredge only
SWIR, Plume 1, Segment 17 active, inferred mid-ocean ridge SWIR -31.1830 58.5000 3600 1997 plume only
SWIR, Plume 2, Segment 16 active, inferred mid-ocean ridge SWIR -31.0670 58.9670 4200 1997 plume only
SWIR, Plume 3, Segment 16 active, inferred mid-ocean ridge SWIR -30.8500 59.3830 3900 1997 plume only
SWIR, Plume 4 active, inferred mid-ocean ridge SWIR -27.9670 63.5500 3400 1997 plume only
SWIR, Plume 5 active, inferred mid-ocean ridge SWIR -27.9170 64.4500 4000 1997 plume only
SWIR, Plume 6 active, inferred mid-ocean ridge SWIR -27.7670 65.1330 3200 1997 plume only
SWIR, unnamed, Segment 26 active, inferred mid-ocean ridge SWIR -37.6080 50.8527 2800 2008 dredge only DY115-20 Leg 6
Tahi Moana 7 active, inferred back-arc spreading center Lau Basin -15.3300 -174.2500 1940 2004 plume only; 2009 video camera tow (activity not confirmed)
Tai Chi active, inferred mid-ocean ridge S MAR -13.5900 -14.5200 3500 2011 plume only
Tangaroa volcano active, inferred arc volcano Kermadec Arc -36.3250 178.0333 890 1999 plume only
Tevnia active, inferred mid-ocean ridge N EPR 10.3333 -103.5533 2925 1994 submersible Alvin did not confirm activity
Three Sisters, Middle Sister active, inferred back-arc spreading center Bransfield Strait -62.6420 -58.9833 1040 1995 plume only; 1999 still had no visual confirmation
Tonga Arc, Volcano 14 active, inferred arc volcano Tonga Arc -23.5750 -176.7050 985 2003 plume and dredge only
Tonga Arc, Volcano 15 active, inferred arc volcano Tonga Arc -23.9000 -176.7800 1400 2003 plume only
Tonga Arc, Volcano 16 active, inferred arc volcano Tonga Arc -24.1883 -176.8217 1400 2003 plume and dredge only
Tonga Arc, Volcano 18 active, inferred arc volcano Tonga Arc -24.5850 -176.9170 1465 2003 plume and dredge only
Tonga Arc, Volcano 4 active, inferred arc volcano Tonga Arc -22.0670 -176.2080 200 2003 plume and dredge only
Tonga Arc, Volcano 8 active, inferred arc volcano Tonga Arc -22.8433 -176.4317 240 2003 plume and dredge only
Tonga Arc, Volcano A active, inferred arc volcano Tonga Arc -20.8600 -175.5500 700 2004 plume only
Tonga Arc, Volcano C active, inferred arc volcano Tonga Arc -20.1800 -175.2000 1050 2004 SS11/2004 cruise did not detect hydrothermal activity
Tonga Arc, Volcano D active, inferred arc volcano Tonga Arc -19.4500 -174.9167 760 2004 plume only
Tonga Arc, Volcano J1 active, inferred arc volcano Tonga Arc -17.2400 -173.9500 560 2004 plume only
VFR, ELSC7 active, inferred back-arc spreading center Lau Basin -22.8833 -176.7500 2050 2009 plume and dredge only
VFR, plume 12 active, inferred back-arc spreading center Lau Basin -21.7300 -176.4530 1910 2004 plume only
VFR, plume 3 active, inferred back-arc spreading center Lau Basin -22.4000 -176.6790 1980 2004 plume only
VFR, plume 4 active, inferred back-arc spreading center Lau Basin -22.3400 -176.6590 1700 2004 plume only
VFR, unnamed active, inferred back-arc spreading center Lau Basin -22.5150 -176.6500 1970 2004 plume only
Vityaz megamullion active, inferred mid-ocean ridge CIR -5.4000 68.5833 3500 1979 plume and deposits only
W Los Huellos Caldera active, inferred mid-ocean ridge Galapagos Rift 1.0000 -90.6000 1600 2005 plume only
W Syoyo active, inferred arc volcano Mariana Arc 22.5080 142.5330 2150 2003 plume only
Wagner Basin active, inferred mid-ocean ridge Gulf of California 31.0666 -114.0833 120 2007 echosounder and grab samples
Walsh active, inferred mid-ocean ridge Mid-Cayman Rise 17.9333 -81.7833 4000 2009 plume only
West Fiji Ridge active, inferred back-arc spreading center North Fiji Basin -17.0000 176.0000 3000 1995 deep tow
West Valley Segment active, inferred mid-ocean ridge JdF Ridge 48.4833 -129.0417 3000 1992 or earlier deposits only
Woodlark Basin, Segment 3B active, inferred back-arc spreading center Woodlark Basin -9.8000 155.0667 3300 2009 plume only
Woodlark Basin, Segment 5B active, inferred back-arc spreading center Woodlark Basin -9.2540 156.1910 3550 1986 plume only; 2000 plume only
Zealandia active, inferred arc volcano Mariana Arc 16.8800 145.8500 144 2003 plume only; 2009 or earlier ROV did not confirm activity
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