Fukujin volcano |
active, inferred |
arc volcano |
Mariana Arc |
21.9300 |
143.4700 |
1100 |
1987 deposits only |
Mariana Trough, Central Trough |
active, confirmed |
back-arc spreading center |
Mariana Trough |
18.0467 |
144.7533 |
3676 |
1987 submersible Alvin |
Kasuga 3 Seamount |
active, confirmed |
arc volcano |
Mariana Arc |
21.3833 |
143.6000 |
1140 |
1987 submersible Alvin |
Kasuga 2 Seamount |
active, confirmed |
arc volcano |
Mariana Arc |
21.6000 |
143.6167 |
500 |
1987 submersible Alvin |
Mariana Mounds |
active, confirmed |
back-arc spreading center |
Mariana Trough |
18.0333 |
144.2833 |
3600 |
1987 submersible Alvin |
Alice Springs Field |
active, confirmed |
back-arc spreading center |
Mariana Trough |
18.2103 |
144.7073 |
3640 |
1987 submersible Alvin; 1982 plume only |
Forecast |
active, confirmed |
arc volcano |
Mariana Arc |
13.4000 |
143.9166 |
1470 |
1992 submersible Shinkai 6500 |
Nikko volcano |
active, confirmed |
arc volcano |
Mariana Arc |
23.0833 |
142.3333 |
600 |
1992 submersible Shinkai 6500; 1979 first observed discolored water above the seamount |
Seamount X |
active, confirmed |
arc volcano |
Mariana Arc |
13.2500 |
144.0200 |
1450 |
1994 or earlier submersible Shinkai 6500 |
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) |
NE Anatahan submarine volcano |
active, inferred |
arc volcano |
Mariana Arc |
16.3750 |
145.7250 |
460 |
2003 multibeam and sidescan sonar only |
Kasuga 1 Seamount |
inactive |
arc volcano |
Mariana Arc |
21.7650 |
143.7100 |
600 |
2003 no plume detected |
Makhahnas |
active, inferred |
arc volcano |
Mariana Arc |
20.5300 |
144.8833 |
420 |
2003 no plume detected |
Mariana Trough, plume 2 |
active, inferred |
back-arc spreading center |
Mariana Trough |
12.7610 |
143.4730 |
2950 |
2003 plume only |
W Syoyo |
active, inferred |
arc volcano |
Mariana Arc |
22.5080 |
142.5330 |
2150 |
2003 plume only |
Ahyi |
active, inferred |
arc volcano |
Mariana Arc |
20.4200 |
145.0300 |
60 |
2003 plume only |
SW Syoyo |
active, inferred |
arc volcano |
Mariana Arc |
22.3870 |
142.7620 |
1750 |
2003 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 |
Snail |
active, confirmed |
back-arc spreading center |
Mariana Trough |
12.9533 |
143.6200 |
2880 |
2003 ROV Jason II; 2003 plume only |
Maug Caldera |
active, confirmed |
arc volcano |
Mariana Arc |
20.0200 |
145.2200 |
145 |
2003 SCUBA shallow vents; 2004 ROV ROPOS deeper vents; 2003 plume only deeper vents |
Pika |
active, confirmed |
back-arc spreading center |
Mariana Trough |
12.9183 |
143.6483 |
2990 |
2003 submersible Shinkai 6500; 2003 plume only |
East Diamante volcano |
active, confirmed |
arc volcano |
Mariana Arc |
15.9300 |
145.6700 |
457 |
2004 ROV ROPOS; 2003 plume only |
Northwest Eifuku |
active, confirmed |
arc volcano |
Mariana Arc |
21.4850 |
144.0430 |
1604 |
2004 ROV ROPOS; 2003 plume only |
Daikoku volcano |
active, confirmed |
arc volcano |
Mariana Arc |
21.3240 |
144.1940 |
450 |
2004 ROV ROPOS; 2003 plume only |
West Rota volcano |
active, confirmed |
arc volcano |
Mariana Arc |
14.3250 |
144.8330 |
1150 |
2005 ROV Hyper-Dolphin; 2003 plume only; 2004 ROV ROPOS did not observe venting |
Minami-Hiyoshi submarine volcano |
active, confirmed |
arc volcano |
Mariana Arc |
23.4970 |
141.9400 |
80 |
2005 ROV HyperDolphin |
Ruby |
active, confirmed |
arc volcano |
Mariana Arc |
15.6200 |
145.5700 |
214 |
2006 ROV Jason II; 2003 plume only |
South Sarigan Seamount |
active, inferred |
arc volcano |
Mariana Arc |
16.5800 |
145.7800 |
240 |
2013 ROV HyperDolphin (did not confirm activity) |
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, 15.5 N |
active, confirmed |
back-arc spreading center |
Mariana Trough |
15.4080 |
144.5090 |
4196 |
2015 plume only, 2016 ROV did not confirm |
Chamorro volcano |
active, confirmed |
arc volcano |
Mariana Arc |
20.8100 |
144.7050 |
896 |
2016 ROV Deep Discoverer; 2003 plume only |