CLSC, plumes on CL1 |
active, inferred |
back-arc spreading center |
Lau Basin |
-17.8667 |
-176.3833 |
2250 |
2009 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 |
GEISEIR site 4, segment K1 |
active, inferred |
mid-ocean ridge |
SEIR |
-41.2025 |
81.0625 |
2800 |
2010 plume only |
SEIR-WXC27 |
active, inferred |
mid-ocean ridge |
SEIR |
-50.4000 |
134.3000 |
2760 |
2015 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, 21 20'S |
active, inferred |
mid-ocean ridge |
S EPR |
-21.3670 |
-114.2570 |
2900 |
1981 plume only; 1987-1988 deposits only |
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 |
Okinawa Trough, Site ES1 |
active, inferred |
back-arc spreading center |
Okinawa Trough |
30.3303 |
129.0827 |
521 |
1992 dredge only |
N Oceanographer |
active, inferred |
mid-ocean ridge |
N MAR |
35.2830 |
-34.8670 |
2600 |
1992 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 |
EPR, 28.4 S, Segment W4 |
active, inferred |
mid-ocean ridge |
S EPR |
-28.4170 |
-112.9640 |
2350 |
1998 plume only |
Kuiwai |
active, inferred |
arc volcano |
Kermadec Arc |
-33.1560 |
-179.9560 |
630 |
2002 plume only |
C-ELSC, plume 14 |
active, inferred |
back-arc spreading center |
Lau Basin |
-21.3200 |
-176.3640 |
2100 |
2004 plume only |
VFR, plume 12 |
active, inferred |
back-arc spreading center |
Lau Basin |
-21.7300 |
-176.4530 |
1910 |
2004 plume only |
GEISEIR site 22, segment L3 |
active, inferred |
mid-ocean ridge |
SEIR |
-42.1130 |
88.0420 |
2400 |
1996 plume only; 2009 plume only |
Nishinoshima Island |
active, inferred |
arc volcano |
Izu-Bonin Arc |
27.2367 |
140.8783 |
5 |
1975 SCUBA |
MTJ, T08C03, 15.72 S |
active, inferred |
back-arc spreading center |
Lau Basin |
-15.7186 |
-174.8338 |
2400 |
2008 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, 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 |
MAR, 17 S |
active, inferred |
mid-ocean ridge |
S MAR |
-17.2522 |
-14.2270 |
3280 |
2013 plume only |
Gakkel Ridge, Site 7 |
active, inferred |
mid-ocean ridge |
Gakkel Ridge |
86.9833 |
55.5000 |
3800 |
2001 plume only |
SWIR, D62 |
active, inferred |
mid-ocean ridge |
SWIR |
-52.2530 |
15.1030 |
3990 |
2000-2001 plume and dredge only |
W Syoyo |
active, inferred |
arc volcano |
Mariana Arc |
22.5080 |
142.5330 |
2150 |
2003 plume only |
GEISEIR site 29, segment M6 |
active, inferred |
mid-ocean ridge |
SEIR |
-44.9054 |
94.9673 |
2700 |
2009 plume only |
ELSC3 |
active, inferred |
back-arc spreading center |
Lau Basin |
-21.1667 |
-176.3333 |
2140 |
2009 plume only |
GEISEIR site 18, segment L3 |
active, inferred |
mid-ocean ridge |
SEIR |
-41.7133 |
87.4375 |
2500 |
2010 plume only |
Chile Rise, Segment N8 |
active, inferred |
mid-ocean ridge |
Chile Rise |
-38.7167 |
-91.5667 |
3330 |
1998 plume only |
Rumble II West |
active, inferred |
arc volcano |
Kermadec Arc |
-35.3600 |
178.5170 |
1500 |
1996 dredging only; 1999 plume only |
South Sarigan Seamount |
active, inferred |
arc volcano |
Mariana Arc |
16.5800 |
145.7800 |
240 |
2013 ROV HyperDolphin (did not confirm activity) |
San Felipe |
active, inferred |
other |
Coastal Baja California |
31.0000 |
-114.8000 |
1 |
1982 or earlier, likely from shore |