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Random pictures

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

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