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active, inferred

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 IDsort descending 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
AAR KR1, Mujin active, inferred mid-ocean ridge SEIR -62.1000 158.8000 2100 2011 plume and biological samples
AAR KR2 active, inferred mid-ocean ridge SEIR -60.0000 152.5000 3200 2011 plume only
Aden New Century Mountains active, inferred mid-ocean ridge Aden Ridge 12.0833 45.6667 800 2000-2001 plume only
Ahyi active, inferred arc volcano Mariana Arc 20.4200 145.0300 60 2003 plume only
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
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
AMAR active, inferred mid-ocean ridge N MAR 36.3833 -33.6500 2600 1992 plume only; 1994 plume only
Area EX/FX active, inferred mid-ocean ridge CIR -21.4000 68.7666 3300 1986 plume and sediments
Area JX active, inferred mid-ocean ridge CIR -22.9666 69.1833 3500 1986 plume only (camera tow did not confirm)
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
Bai Causeway active, inferred mid-ocean ridge SWIR -37.9000 48.8000 3000 2014 leg 2 or 3 of the 30th Chinese Cruise
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 900 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, 63 40'E active, inferred mid-ocean ridge Carlsberg Ridge 3.7000 63.6666 3500 2007 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
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
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
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, 8-17 S, Segment 1 active, inferred mid-ocean ridge CIR -8.2500 68.2000 3600 2010 plume only
CIR, 8-17 S, Segment 2 active, inferred mid-ocean ridge CIR -9.9000 66.7500 4000 2010 plume only
CIR, 8-17 S, Segment 3 active, inferred mid-ocean ridge CIR -10.6600 66.5000 3500 2010 plume only
CIR, 8-17 S, Segment 4, 10.9 S active, inferred mid-ocean ridge CIR -10.9000 66.7000 3500 2010 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
CIR, 8-17 S, Segment 4, 11.3 S active, inferred mid-ocean ridge CIR -11.3000 66.4000 3500 2010 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
CIR, 8-17 S, Segment 5, 12.6 S active, inferred mid-ocean ridge CIR -12.6000 66.1000 3800 2010 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
CIR, 8-17 S, Segment 6, 14.75 S active, inferred mid-ocean ridge CIR -14.7500 66.5000 3400 2010 plume only
CIR, 8-17 S, Segment 7 active, inferred mid-ocean ridge CIR -17.0000 66.8000 3100 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
Daiichi-Amami knoll active, inferred arc volcano Ryukyu Arc 28.4500 128.7500 350 2013 multibeam echo sounder on S/V Takuyo and AUV Gondo
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
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
Dugong submarine volcano active, inferred back-arc spreading center Lau Basin -15.4500 -175.7000 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 -15.1010 -173.6780 1350 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
Eolo Seamount active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 38.5800 14.1667 800 1976 Fe crusts only; 2007 plume only; 2011 ROV Hercules but can not confirm based on Carey et al. (2012)
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 1985/86 or 1989 TV grab (need to check references to confirm activity)
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 1985/86 or 1989 TV grab
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
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
Eva active, inferred arc volcano New Hebrides Arc -22.0000 170.7500 1600 2008 plume 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, 11a-3 active, inferred back-arc spreading center Lau Basin -16.7950 -174.5230 2000 2008 plume only
FRSC, 14b, 16.11 S active, inferred back-arc spreading center Lau Basin -16.1150 -174.5680 2250 2008 plume only
FRSC, 14b, 16.31 S active, inferred back-arc spreading center Lau Basin -16.3110 -174.5550 2380 2008 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 1750 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)
FRSC, T12A-01 active, inferred back-arc spreading center Lau Basin -17.7850 -174.5260 500 2012 plume only
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
GEISEIR site 1, segment J2 active, inferred mid-ocean ridge SEIR -39.4400 78.0920 2270 1996 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 11, segment K4 active, inferred mid-ocean ridge SEIR -42.5375 82.8266 2600 2010 plume only
GEISEIR site 12, segment K4 active, inferred mid-ocean ridge SEIR -42.6600 83.0366 2600 2010 plume only
GEISEIR site 13, segment L1 active, inferred mid-ocean ridge SEIR -41.0125 86.0608 2800 2010 plume only
GEISEIR site 14, segment L1 active, inferred mid-ocean ridge SEIR -41.0716 86.1550 2700 2010 plume only
GEISEIR site 15, segment L1 active, inferred mid-ocean ridge SEIR -41.2230 86.3892 2500 2010 plume only
GEISEIR site 16, segment L3 active, inferred mid-ocean ridge SEIR -41.5883 87.2615 2500 2010 plume only
GEISEIR site 17, segment L3 active, inferred mid-ocean ridge SEIR -41.6498 87.3481 2500 2010 plume only
GEISEIR site 18, segment L3 active, inferred mid-ocean ridge SEIR -41.7133 87.4375 2500 2010 plume only
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
GEISEIR site 2, segment J4 active, inferred mid-ocean ridge SEIR -41.2520 79.1030 2800 1996 plume and dredge only
GEISEIR site 20, segment L3 active, inferred mid-ocean ridge SEIR -41.9508 87.8008 2400 2010 plume only
GEISEIR site 21, segment L3 active, inferred mid-ocean ridge SEIR -42.0050 87.8808 2400 2010 plume only
GEISEIR site 22, segment L3 active, inferred mid-ocean ridge SEIR -42.1130 88.0420 2400 1996 plume only; 2009 plume only
GEISEIR site 23, segment M2 active, inferred mid-ocean ridge SEIR -42.0272 89.2205 2400 2009 plume only
GEISEIR site 24, segment M3 active, inferred mid-ocean ridge SEIR -43.0369 91.0357 2400 2009 plume only
GEISEIR site 25, segment M4 active, inferred mid-ocean ridge SEIR -43.3115 92.1335 2700 2009 plume only
GEISEIR site 26, segment M4 active, inferred mid-ocean ridge SEIR -43.6901 92.8451 2500 2009 plume only
GEISEIR site 27, segment M5 active, inferred mid-ocean ridge SEIR -43.9805 93.4571 2700 2009 plume only
GEISEIR site 28, segment M6 active, inferred mid-ocean ridge SEIR -44.7237 94.6039 2700 2009 plume only
GEISEIR site 29, segment M6 active, inferred mid-ocean ridge SEIR -44.9054 94.9673 2700 2009 plume only
GEISEIR site 3, segment J4 active, inferred mid-ocean ridge SEIR -41.7720 79.7530 2800 1996 plume only
GEISEIR site 30, segment O1 active, inferred mid-ocean ridge SEIR -46.6240 96.0594 2500 2009 plume only
GEISEIR site 31, segment O1 active, inferred mid-ocean ridge SEIR -46.8956 96.5709 2600 2009 plume only
GEISEIR site 32, segment O2 active, inferred mid-ocean ridge SEIR -47.1196 96.8947 2600 2009 plume only
GEISEIR site 33, segment O2 active, inferred mid-ocean ridge SEIR -47.2383 97.1566 2700 2009 plume only
GEISEIR site 34, segment O3 active, inferred mid-ocean ridge SEIR -47.4145 97.4373 2700 2009 plume only
GEISEIR site 35, segment O3 active, inferred mid-ocean ridge SEIR -47.6179 97.8678 2600 2009 plume only
GEISEIR site 36, segment O3 active, inferred mid-ocean ridge SEIR -47.7009 98.0631 2700 2009 plume only
GEISEIR site 37, segment O4 active, inferred mid-ocean ridge SEIR -47.7483 98.1756 2800 2009 plume only
GEISEIR site 38, segment O4 active, inferred mid-ocean ridge SEIR -48.0048 98.8232 2800 2009 plume only
GEISEIR site 4, segment K1 active, inferred mid-ocean ridge SEIR -41.2025 81.0625 2800 2010 plume only
GEISEIR site 5, segment K1 active, inferred mid-ocean ridge SEIR -41.2420 81.1580 2860 1996 plume only; 2007 plume only
GEISEIR site 6, segment K2 active, inferred mid-ocean ridge SEIR -41.6600 81.6617 2600 2007 plume only; 2010 plume only
GEISEIR site 7, segment K3 active, inferred mid-ocean ridge SEIR -41.8020 81.8380 2540 1996 plume only; 2010 plume only
GEISEIR site 8, segment K3 active, inferred mid-ocean ridge SEIR -41.8833 81.9816 2800 2010 plume only
GEISEIR site 9, segment K3 active, inferred mid-ocean ridge SEIR -41.9633 82.0600 2700 2010 plume only
Gemini-Oscostar Volcanic Complex active, inferred arc volcano New Hebrides Arc -20.9830 170.2830 100 2001 deposits and plume; 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
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
Kibblewhite active, inferred arc volcano Kermadec Arc -34.5750 179.2550 1106 2002 plume only
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/Sunda 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/Sunda 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 -16.8300 168.5300 484 2001 plume and inconclusive grab samples
Landing Stage active, inferred mid-ocean ridge SWIR -37.5000 51.0000 2300 2014 leg 2 or 3 of the 30th Chinese Cruise
Leyte active, inferred arc volcano Luzon/Bicol Arc 11.5000 124.7000 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 -15.3330 -176.2830 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, 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, 17 S active, inferred mid-ocean ridge S MAR -17.2522 -14.2270 3280 2013 plume only
MAR, 19 S active, inferred mid-ocean ridge S MAR -19.3301 -11.9421 2707 2013 plume only
MAR, 23 S active, inferred mid-ocean ridge S MAR -23.7428 -13.3936 2880 2013 plume only
MAR, 25 S active, inferred mid-ocean ridge S MAR -25.3350 -13.6305 2570 2013 plume only
MAR, 27 N active, inferred mid-ocean ridge N MAR 27.0000 -44.5000 2900 1993 plume only
MAR, 27 S active, inferred mid-ocean ridge S MAR -27.1476 -13.4753 3341 2013 plume only
MAR, 28 S active, inferred mid-ocean ridge S MAR -27.7936 -13.3730 3217 2013 plume only
MAR, 30 N active, inferred mid-ocean ridge N MAR 30.0333 -42.5000 3400 1993 plume only
MAR, 30 S active, inferred mid-ocean ridge S MAR -29.9505 -13.8545 3379 2013 plume only
MAR, 30.8 S active, inferred mid-ocean ridge S MAR -30.8327 -13.4690 2950 2013 plume only
MAR, 31 S active, inferred mid-ocean ridge S MAR -31.7377 -13.3772 3050 2013 plume only
MAR, 33 S active, inferred mid-ocean ridge S MAR -32.9676 -14.4517 2600 2013 plume only
MAR, 4 02'S active, inferred mid-ocean ridge S MAR -4.0333 -12.2500 4000 2005 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, segment south of St. Paul system active, inferred mid-ocean ridge N MAR 0.5000 -25.0000 3500 2013 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, 14.5 N active, inferred back-arc spreading center Mariana Trough 14.4870 144.0940 4120 2015 plume only
Mariana Trough, 16.5 N active, inferred back-arc spreading center Mariana Trough 16.4010 144.8700 3829 2015 plume only
Mariana Trough, 18.2 N active, inferred back-arc spreading center Mariana Trough 18.1080 144.7380 3916 2015 plume only
Mariana Trough, plume 2 active, inferred back-arc spreading center Mariana Trough 12.7610 143.4730 2950 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 Lau Basin -14.9833 -173.8000 2600 2010 plume only
Mata Ono active, inferred arc volcano Lau Basin -14.9333 -173.7916 2600 2010 plume only
Mata Taha active, inferred arc volcano Lau Basin -15.0416 -173.7833 2160 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
Mohns Ridge, 72 N active, inferred mid-ocean ridge Mohns Ridge 72.0390 -0.2520 2500 1987 plume only; 2013 plume only
Mohns Ridge, 72.8 N active, inferred mid-ocean ridge Mohns Ridge 72.8060 4.1650 2300 2013 plume only
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 R/V Sonne SO-135; 2004 plume only
Montserrat-Marie Galante fault active, inferred arc volcano Lesser Antilles Arc 16.4600 -61.9820 1000 1987 plume and deposits
MTJ, PAPATUA active, inferred back-arc spreading center Lau Basin -15.3850 -174.6430 2170 1986 PAPATUA Expedition deposits only; 2008 plume only
MTJ, T08C01 active, inferred back-arc spreading center Lau Basin -15.9629 -174.7961 2400 2008 plume only
MTJ, T08C03 and T08C04 active, inferred back-arc spreading center Lau Basin -15.6100 -174.8200 2300 2008 plume only
MTJ, T08C03, 15.72 S active, inferred back-arc spreading center Lau Basin -15.7186 -174.8338 2400 2008 plume only
MTJ, T08C05 active, inferred back-arc spreading center Lau Basin -15.5134 -174.7407 2100 2008 plume only
MTJ, V12A-04 active, inferred back-arc spreading center Lau Basin -15.9540 -174.7110 1330 2012 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 16.3750 145.7250 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
NELSC, T08C09 and T08C18 active, inferred back-arc spreading center Lau Basin -15.4030 -174.2630 1800 2008 plume only
NELSC, T08C12 active, inferred back-arc spreading center Lau Basin -15.2179 -174.1788 2000 2008 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 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
NWLSC, Central Caldera active, inferred back-arc spreading center Lau Basin -15.8000 -177.2666 2200 2008 plume and dredge only
NWLSC, Southern Caldera active, inferred back-arc spreading center Lau Basin -15.9000 -177.4166 2160 2008 plume 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
Pobeda-1 active, inferred mid-ocean ridge N MAR 17.1500 -46.4200 3100 2014/2015 video profiling, TVgrab and corer
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 Reykjanes Ridge 62.4500 -25.4330 500 NotProvided
Reykjanes Ridge, Area B active, inferred mid-ocean ridge Reykjanes Ridge 59.8167 -29.6833 1000 1992 submersible Mir did not find vents
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
San Felipe active, inferred other Coastal Baja California 31.0000 -114.8000 1 1982 or earlier, likely from shore
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 38.6333 14.8500 240 1995 ROV Comex deposits only; 2007 plume only
SEIR-WXC02 active, inferred mid-ocean ridge SEIR -50.2500 137.0000 2620 2015 plume only
SEIR-WXC06 active, inferred mid-ocean ridge SEIR -50.2500 138.5500 2400 2015 plume only
SEIR-WXC07 active, inferred mid-ocean ridge SEIR -50.2500 138.3000 2420 2015 plume only
SEIR-WXC12 active, inferred mid-ocean ridge SEIR -50.2500 136.2500 2780 2015 plume only
SEIR-WXC15 active, inferred mid-ocean ridge SEIR -50.2500 135.3000 3000 2015 plume only
SEIR-WXC17 active, inferred mid-ocean ridge SEIR -50.3000 133.8000 2780 2015 plume only
SEIR-WXC22 active, inferred mid-ocean ridge SEIR -50.2500 132.1000 2950 2015 plume only
SEIR-WXC25 active, inferred mid-ocean ridge SEIR -50.2500 131.9000 3050 2015 plume only
SEIR-WXC27 active, inferred mid-ocean ridge SEIR -50.4000 134.3000 2760 2015 plume only
SESCA active, inferred mid-ocean ridge Gorda Ridge 40.7500 -127.5200 3300 1986 sediments and heat-flow measurements
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
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
South Sarigan Seamount active, inferred arc volcano Mariana Arc 16.5800 145.7800 240 2013 ROV HyperDolphin (did not confirm activity)
Split Seamount active, inferred mid-ocean ridge JdF Ridge 47.6400 -128.9667 2350 1990 camera tow (need reference to check if activity confirmed)
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
Stockwork active, inferred mid-ocean ridge JdF Ridge 47.9000 -129.1240 2300 2005 submersible Alvin (need publication to determine if confirmed)
Stromboli active, inferred arc volcano Aeolian Arc, Tyrrhenian Sea 38.7890 15.2130 250 1969 Fe crusts only
Su Causeway active, inferred mid-ocean ridge SWIR -38.1000 48.6000 3000 2014 leg 2 or 3 of the 30th Chinese Cruise
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, 63.9 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 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; 2008 plume only; 2009 video camera tow (activity not confirmed)
TaiJi active, inferred mid-ocean ridge S MAR -13.5900 -14.5200 3180 2011 plume only
Tangyin active, inferred back-arc spreading center Okinawa Trough 25.0667 122.5667 1206 2014 likely by dredging or ROV during the HOBAB3 cruise on R/V Kexue
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 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
VC7 active, inferred arc volcano Hellenic Arc, Aegean Sea 36.5608 25.5250 320 2010 ROV Hercules
Vema Fracture Zone active, inferred other N MAR 10.7100 -42.6800 5180 2015 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 17.8333 -81.8333 4000 2009 plume only; 2013 plume only
West Fiji Ridge active, inferred back-arc spreading center North Fiji Basin -17.0000 176.0000 3000 1995 deep tow
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)
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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