NW Rota-1
NW Rota-1 is a seamount in the Mariana Islands, northwest of Rota, which was discovered through its hydrothermal activity in 2003. The volcano has been observed to be erupting underwater, the first time that submarine explosive eruptions have been directly witnessed.

The summit of the seamount lies at below sea level, with a ridge capping off the seamount. It has several craters, the most active of which is located south of the summit ridge and is called "Brimstone Pit". Eruptions have been recorded in 2008–2010 and took the form of Strombolian eruptions with the emission of lava and large amounts of tephra. The erupted material is unstable and forms sediment flows and landslides; one large landslide occurred on 14 August 2009 and stripped part of the southern flank of NW Rota-1. Such landslides generate ash plumes underwater and are similar to large landslides at other active submarine volcanoes.

The activity gives rise to intense hydrothermal plumes, which contain droplets of molten sulfur and bubbles of carbon dioxide, among other compounds. It is estimated that NW Rota-1 releases 400,000 ± 100,000 tonne/year of carbon dioxide. The hydrothermal activity nourishes microbial mats and these in turn many animals, although the unstable environment from the frequent eruptions limits animal diversity.
Q503269
seamount
Concept
Q153732
Mariana Islands
LOC
Q949090
Rota
LOC
Q1036221
hydrothermal
UNK
Q2546109
erupting underwater
Concept
Q1321886
explosive eruption
Concept
Q109391
crater
Concept
Q611880
Strombolian eruption
Concept
Q209245
tephra
Concept
Q7445303
sediment flow
Concept
Q167903
landslide
Concept
Q682
molten sulfur
Concept
Q1997
carbon dioxide
Concept
Q1964349
microbial mat
Concept
Q3056587
NW Rota-1
LOC
Q3056587
NW Rota-1
LOC
Q3056587
NW Rota-1
LOC
2003-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2003
DATE
2008-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2008
DATE
2009-08-14T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
14 August 2009
DATE
-1^^http://www.w3.org/2001/XMLSchema#decimal
-1
NUMBER
+2010^^http://www.w3.org/2001/XMLSchema#decimal
2010
NUMBER
-1^^http://www.w3.org/2001/XMLSchema#decimal
-1
NUMBER
-1^^http://www.w3.org/2001/XMLSchema#decimal
-1
NUMBER
+400.000^^http://www.w3.org/2001/XMLSchema#decimal
400,000
NUMBER
+100.000^^http://www.w3.org/2001/XMLSchema#decimal
100,000
NUMBER
part of
located on terrain feature