Axial Seamount, International District |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
45.9266 |
-129.9795 |
1544 |
1986 submersible Pisces IV |
Axial Seamount, ASHES |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
45.9333 |
-130.0140 |
1540 |
1984 submersible Alvin |
Axial Seamount, CASM |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
45.9892 |
-130.0272 |
1580 |
1983 submersible Pisces IV |
North Cleft, high temperature |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
44.9800 |
-130.2000 |
2300 |
1987 camera/CTD tows discovered low-temperature vents; 1988 submersible Alvin sampled low-temperature vents; 1990 submersible Alvin discovered black smoker |
Magic Mountain, 3-km south |
active, inferred |
mid-ocean ridge |
Explorer Ridge |
49.7250 |
-130.2667 |
1850 |
2002 AUV ABE plume only |
North Cleft, low temperature |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
44.8833 |
-130.2667 |
2250 |
1987-1989 camera/CTD tows |
Magic Mountain |
active, confirmed |
mid-ocean ridge |
Explorer Ridge |
49.7500 |
-130.2667 |
1850 |
1984 submersible Pisces IV |
Central Cleft, off-axis |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
44.7583 |
-130.2750 |
2200 |
2000 ROV Tiburon |
South Cleft |
active, confirmed |
mid-ocean ridge |
JdF Ridge |
44.6667 |
-130.3667 |
2250 |
1981 deep-tow photographs; 1984 submersible Alvin |
Brown Bear Seamount |
inactive |
mid-ocean ridge |
JdF Ridge |
46.0333 |
-130.5500 |
1500 |
NotProvided |
Dellwood Seamount |
inactive |
mid-ocean ridge |
Explorer Ridge |
50.7470 |
-130.8961 |
800 |
1974 or earlier deposits only; 2018 ROV Hercules inactive |
Macdonald Seamount |
active, confirmed |
intra-plate volcano |
Central Pacific |
-28.9833 |
-140.2500 |
150 |
1989 submersible Cyana |
Teahitia seamount |
active, confirmed |
intra-plate volcano |
Central Pacific |
-17.5670 |
-148.8167 |
1460 |
1983 submersible Cyana |
Pacific-Antarctic Ridge, 60 S segment |
active, inferred |
mid-ocean ridge |
Pacific-Antarctic Ridge |
-60.0000 |
-152.0000 |
2300 |
2009 plume only |
Loihi Seamount |
active, confirmed |
intra-plate volcano |
Central Pacific |
18.9500 |
-155.2500 |
4800 |
1985 bottom photography R/V Hakuho Maru; 1987 submersible Alvin |
Hawaiian Ridge |
inactive |
intra-plate volcano |
Central Pacific |
15.0000 |
-157.5000 |
5000 |
1987 or earlier |
Vailulu'u Seamount |
active, confirmed |
intra-plate volcano |
Central Pacific |
-14.2167 |
-169.0667 |
1000 |
2005 submersible Pisces V; 2000 plume only |
Kagamil Island |
active, confirmed |
arc volcano |
Aleutian Arc, western |
52.9800 |
-169.7200 |
5 |
2007 SCUBA |
Pacific-Antarctic Ridge, 64 S segment |
active, inferred |
mid-ocean ridge |
Pacific-Antarctic Ridge |
-64.5000 |
-170.0000 |
2300 |
2009 plume only |
Niua North |
active, confirmed |
arc volcano |
Tonga Arc |
-15.0667 |
-173.5667 |
1375 |
2012 ROV Quest 4000; 2008 plume only |
Niua South |
active, confirmed |
arc volcano |
Tonga Arc |
-15.1650 |
-173.5700 |
1180 |
2008 commercial ROV |
East Mata submarine volcano |
active, inferred |
arc volcano |
Tonga Arc |
-15.1010 |
-173.6780 |
1350 |
2008 plume only; 2009 plume only |
West Mata submarine volcano |
active, confirmed |
arc volcano |
Tonga Arc |
-15.0950 |
-173.7500 |
1208 |
2009 ROV Jason II; 2008 eruption plume detected |
Mata Fitu |
active, confirmed |
arc volcano |
Lau Basin |
-14.9166 |
-173.7833 |
2750 |
2010 towed camera |
Mata Nima |
inactive |
arc volcano |
Lau Basin |
-14.9583 |
-173.7833 |
2670 |
2010 no plume detected |
Mata Ua |
active, confirmed |
arc volcano |
Lau Basin |
-15.0166 |
-173.7833 |
2397 |
2012 ROV Quest 4000; 2010 plume only (towed camera did not confirm) |
Mata Taha |
active, inferred |
arc volcano |
Lau Basin |
-15.0416 |
-173.7833 |
2160 |
2010 plume only |
Mata Ono |
active, inferred |
arc volcano |
Lau Basin |
-14.9333 |
-173.7916 |
2600 |
2010 plume only |
Mata Tolu |
active, confirmed |
arc volcano |
Lau Basin |
-15.0049 |
-173.7936 |
1900 |
2010 towed camera; 2009 plume and dredge only |
Mata Fa |
active, inferred |
arc volcano |
Lau Basin |
-14.9833 |
-173.8000 |
2600 |
2010 plume only |