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 |
central Manus Basin, Bismarck Sea |
inactive |
back-arc spreading center |
Manus Basin |
-3.4199 |
150.1681 |
2500 |
NotProvided |
Solwara 13 |
active, confirmed |
back-arc spreading center |
Manus Basin |
-3.7320 |
151.7465 |
2000 |
2009 commercial ROV Fugro FV300; 1993 plume only |
CLSC, CL_7 |
active, inferred |
back-arc spreading center |
Lau Basin |
-18.1333 |
-176.3667 |
2250 |
2009 plume only |
FRSC, 14b, 16.31 S |
active, inferred |
back-arc spreading center |
Lau Basin |
-16.3110 |
-174.5550 |
2380 |
2008 plume only |
Tu'i Malila |
active, confirmed |
back-arc spreading center |
Lau Basin |
-21.9876 |
-176.5678 |
1870 |
2005 ROV Jason II; 2004 plume only |
13 N Ridge Site |
active, confirmed |
back-arc spreading center |
Mariana Trough |
13.0987 |
143.6886 |
3036 |
2000 deep-tow camera (later, same year - ROV Kaiko) |
Vienna Woods, Hydrothermal Field 4 |
active, confirmed |
back-arc spreading center |
Manus Basin |
-3.3712 |
150.0360 |
2240 |
1990 TV-grab |
SuSu Knolls |
active, confirmed |
back-arc spreading center |
Manus Basin |
-3.8000 |
152.1000 |
1520 |
1996 towed camera/video; 1993 plume only |
Tarama Knoll |
active, confirmed |
back-arc spreading center |
Okinawa Trough |
25.0916 |
124.5416 |
1990 |
2009 ROV HyperDolphin |
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 |
Mariana Mounds |
active, confirmed |
back-arc spreading center |
Mariana Trough |
18.0333 |
144.2833 |
3600 |
1987 submersible Alvin |
Solwara 16 |
active, inferred |
back-arc spreading center |
Manus Basin |
-3.4380 |
149.9670 |
2163 |
2009 commercial ROV Fugro FV300 (activity not confirmed) |
CLSC, CL_8 |
active, inferred |
back-arc spreading center |
Lau Basin |
-18.0500 |
-176.3333 |
2250 |
2009 plume only |
FRSC, 14b, 16.11 S |
active, inferred |
back-arc spreading center |
Lau Basin |
-16.1150 |
-174.5680 |
2250 |
2008 plume only |
C-ELSC, plume 13 |
active, inferred |
back-arc spreading center |
Lau Basin |
-21.4150 |
-176.3720 |
2100 |
2004 plume only |
Hine Hina |
active, confirmed |
back-arc spreading center |
Lau Basin |
-22.5300 |
-176.6970 |
1900 |
1989 submersible Nautile |
western Manus Basin, Bismarck Sea |
inactive |
back-arc spreading center |
Manus Basin |
-3.0000 |
147.0000 |
1800 |
NotProvided |
SPOT, Hatoma Knoll |
active, confirmed |
back-arc spreading center |
Okinawa Trough |
24.8550 |
123.8410 |
1520 |
1999 submersible Shinkai 2000 |
Perseverance |
active, confirmed |
back-arc spreading center |
Mariana Trough |
15.4802 |
144.5077 |
3935 |
2016 ROV SuBastian; 2015 AUV Sentry plume mapping |
east of Central Spreading Ridge |
inactive |
back-arc spreading center |
North Fiji Basin |
-15.4510 |
174.6902 |
3000 |
NotProvided |
Pika |
active, confirmed |
back-arc spreading center |
Mariana Trough |
12.9183 |
143.6483 |
2990 |
2003 submersible Shinkai 6500; 2003 plume only |
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 |
C-ELSC, plume 19 |
active, inferred |
back-arc spreading center |
Lau Basin |
-20.8700 |
-176.2170 |
2230 |
2004 plume only |
Minami-Ensei Knoll |
active, confirmed |
back-arc spreading center |
Okinawa Trough |
28.3917 |
127.6417 |
740 |
1988 deep tow TV surveys followed by submersible Shinkai 2000; 1986 dredged Calyptogena shells |
Mariana Trough, plume 2 |
active, inferred |
back-arc spreading center |
Mariana Trough |
12.7610 |
143.4730 |
2950 |
2003 plume only |
FRSC, 11a-3 |
active, inferred |
back-arc spreading center |
Lau Basin |
-16.7950 |
-174.5230 |
2000 |
2008 plume only |
C-ELSC, plume 14 |
active, inferred |
back-arc spreading center |
Lau Basin |
-21.3200 |
-176.3640 |
2100 |
2004 plume only |
Vai Lili |
active, confirmed |
back-arc spreading center |
Lau Basin |
-22.2151 |
-176.6083 |
1764 |
1989 submersible Nautile |
Solwara 17 |
active, confirmed |
back-arc spreading center |
Manus Basin |
-3.0380 |
147.5280 |
535 |
2009 commercial ROV Fugro FV300; 2008 plumes with some sites subsequently observed with ROV |