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NW Rota-1 volcano

Submarine volcano -517 m / - 1,696 ft
United States, Mariana Islands, 14.6°N / 144.78°E
Current status: dormant (1 out of 5) | Reports
NW Rota-1 volcano books
Typical eruption style: unspecified
NW Rota-1 volcano eruptions: 2010 No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

A submarine volcano detected during a 2003 NOAA bathymetric survey of the Mariana Island arc was found to be hydrothermally active and named NW Rota-1. The basaltic to basaltic-andesite seamount rises to within 517 m of the sea surface SW of Esmeralda Bank and lies 64 km NW of Rota Island and about 100 km north of Guam. When Northwest Rota-1 was revisited in 2004, a minor submarine eruption from a vent named Brimstone Pit on the upper south flank about 40 m below the summit intermittently ejected a plume several hundred meters high containing ash, rock particles, and molten sulfur droplets that adhered to the surface of the remotely operated submersible vehicle. The active vent was funnel-shaped, about 20 m wide and 12 m deep. NW Rota-1 is a large submarine volcano with prominent structural lineaments about a kilometer apart cutting across the summit of the edifice and down the NE and SW flanks.
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Smithsonian / GVP volcano information

NW Rota-1 Photos:

The smooth crust of the lake is broken into plates, which are moving against or away from each other, simulating plate tectonics. Above, a miniature mid-ocean spreading zone can be seen where two larger pieces of crust are moving away from each other. Even miniature transform faults and sheer zones due to differential and rotational movements can be seen. (Photo: Tom Pfeiffer)
The smooth crust of the lake is broken into plates, which are moving against or away from each other, simulating plate tectonics. Above, a miniature mid-ocean spreading z...
Zoom onto the rotating steam ring. (Photo: Tom Pfeiffer)
Zoom onto the rotating steam ring. (Photo: Tom Pfeiffer)
Ijen-Two miners on a rotating share/basis are always on duty tending the fires (Photo: jorge)
Ijen-Two miners on a rotating share/basis are always on duty tending the fires (Photo: jorge)
Wide angle long exposure with Polaris rotation center in the left and Colima with the glowing dome to the right. (Photo: Tom Pfeiffer)
Wide angle long exposure with Polaris rotation center in the left and Colima with the glowing dome to the right. (Photo: Tom Pfeiffer)
Lava flowing downhil from multiple outbreak points results into its quickly cooled crust rotating into this beautiful rosette like texture (Photo: Ingrid Smet)
Lava flowing downhil from multiple outbreak points results into its quickly cooled crust rotating into this beautiful rosette like texture (Photo: Ingrid Smet)
The westernmost (left) vent (S1) has produced an ash-rich eruption; glowing spatter still lies around this vent, which today was not often active (but becomes protagonist a few days later). Seconds later, a dry strombolian eruption occurred from the NE vent (right). (Photo: Tom Pfeiffer)
The westernmost (left) vent (S1) has produced an ash-rich eruption; glowing spatter still lies around this vent, which today was not often active (but becomes protagonist...



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