Whale Island |
active, confirmed |
back-arc spreading center |
Taupo Volcanic Zone |
-37.8600 |
176.9800 |
42 |
1990 or earlier, likely by SCUBA |
CLSC, A3 |
active, confirmed |
back-arc spreading center |
Lau Basin |
-18.6000 |
-176.4500 |
2500 |
1990 submersible Mir |
Parece Vela Ridge, Philippine Sea |
inactive |
back-arc spreading center |
Parece Vela Basin |
16.0000 |
139.1667 |
5000 |
NotProvided |
FRSC, Fonualei South |
active, confirmed |
back-arc spreading center |
Lau Basin |
-17.5352 |
-174.5668 |
1620 |
2012 ROV Quest 4000 |
N-ELSC, plume 22 |
active, inferred |
back-arc spreading center |
Lau Basin |
-20.4000 |
-176.1580 |
2700 |
2004 plume only |
White Island |
active, confirmed |
back-arc spreading center |
Taupo Volcanic Zone |
-37.5191 |
177.1953 |
30 |
1989 or earlier, likely SCUBA |
Vai Lili |
active, confirmed |
back-arc spreading center |
Lau Basin |
-22.2151 |
-176.6083 |
1764 |
1989 submersible Nautile |
Starfish Seamount, Tinakula |
active, confirmed |
back-arc spreading center |
New Hebrides back-arc |
-12.2028 |
167.6139 |
1204 |
2011 commercial ROV; 1989 plume only; 1989 towed camera survey did not confirm activity; 2002 plume and dredge only |
FRSC, T12A-01 |
active, inferred |
back-arc spreading center |
Lau Basin |
-17.7850 |
-174.5260 |
500 |
2012 plume only |
Tahi Moana 2 |
active, confirmed |
back-arc spreading center |
Lau Basin |
-21.9200 |
-176.5330 |
1870 |
1989 submersible Nautile (need reference to check if activity confirmed); 2004 plume only; 2008 commercial ROV (report does not confirm activity) |
Lobster |
active, inferred |
back-arc spreading center |
Lau Basin |
-15.3330 |
-176.2830 |
1500 |
2008 plume and dredge only |
central Manus Basin, Bismarck Sea |
inactive |
back-arc spreading center |
Manus Basin |
-3.4199 |
150.1681 |
2500 |
NotProvided |
Izena Cauldron |
active, confirmed |
back-arc spreading center |
Okinawa Trough |
27.2667 |
127.0833 |
1610 |
1988 submersible Shinkai 2000 |
Mariana Trough, plume 2 |
active, inferred |
back-arc spreading center |
Mariana Trough |
12.7610 |
143.4730 |
2950 |
2003 plume only |
Sonne 99 |
active, confirmed |
back-arc spreading center |
North Fiji Basin |
-16.9500 |
173.9167 |
1980 |
1995 deep tow video and TV-grab |
White Church |
active, confirmed |
back-arc spreading center |
Lau Basin |
-21.9612 |
-176.5234 |
1960 |
1989 submersible Nautile; 2004 plume survey |
CLSC, CL_7 |
active, inferred |
back-arc spreading center |
Lau Basin |
-18.1333 |
-176.3667 |
2250 |
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 |
NWLSC, Southern Caldera |
active, inferred |
back-arc spreading center |
Lau Basin |
-15.9000 |
-177.4166 |
2160 |
2008 plume 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 |
Mariana Trough, Central Trough |
active, confirmed |
back-arc spreading center |
Mariana Trough |
18.0467 |
144.7533 |
3676 |
1987 submersible Alvin |
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) |
east of Central Spreading Ridge |
inactive |
back-arc spreading center |
North Fiji Basin |
-15.4510 |
174.6902 |
3000 |
NotProvided |
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 |
Okinawa Trough, Site ES1 |
active, inferred |
back-arc spreading center |
Okinawa Trough |
30.3303 |
129.0827 |
521 |
1992 dredge only |
N-ELSC, plume 25 |
active, inferred |
back-arc spreading center |
Lau Basin |
-19.8900 |
-176.0640 |
2680 |
2004 plume only |
Yokosuka |
active, confirmed |
back-arc spreading center |
Okinawa Trough |
25.2638 |
124.3733 |
2190 |
2016 ROV Kaiko; 2014 plume only |
White Lady |
active, confirmed |
back-arc spreading center |
North Fiji Basin |
-16.9833 |
173.9167 |
2000 |
1988 towed camera and plume; 1989 submersible Nautile |
CLSC, CL_8 |
active, inferred |
back-arc spreading center |
Lau Basin |
-18.0500 |
-176.3333 |
2250 |
2009 plume only |
Pere Lachaise |
inactive |
back-arc spreading center |
North Fiji Basin |
-16.9667 |
173.9333 |
2000 |
1989 submersible Nautile did not find activity; 1991 submersible Shinkai 6500 did not find activity |