Woods Hole Coastal and Marine Science Center

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Marinna Martini prepares to deploy tripods along the outer perimeter of Diamond Shoals, NC
January 13, 2009

Tripod deployment along the outer perimeter of Diamond Shoals, NC

Marinna Martini, Woods Hole, Coastal and Marine Science Center,  prepares to deploy tripods at three sites along the outer perimeter of Diamond Shoals, North Carolina. Mounted on the tripods were instruments to measure surface waves, pressure, current velocity, bottom turbulence, suspended-sediment profiles, and sea-floor sand-ripple bedforms; one tripod also held a visual

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Photograph of  Instrumented Pressure Testing Chamber body
December 31, 2008

Instrumented Pressure Testing Chamber

A pressurized, stable, hydrate-bearing sediment core can be fed through the IPTC body, shown here being used in Singapore to support the Indian National Gas Hydrates Program (NGHP1)

Map indicating locations of personnel involved in the Gas Hydrates Project
December 31, 2008

Gas Hydrates Project personnel location map.

The USGS Gas Hydrates Project integrates across USGS mission areas, programs, and regions. The stars indicate the locations of personnel involved in the Gas Hydrates Project. Within the US, much of the research focuses on the Gulf of Mexico and Alaska, which represent marine and permafrost-associated settings for gas hydrates, respectively.

Area in northern Alaska where subsurface temperature and pressure conditions are conducive to the occurrence of gas hydrates
December 31, 2008

Northern Alaska and potential gas hydrate occurences

 

Area in northern Alaska where subsurface temperature and pressure conditions are conducive to the occurrence of gas hydrates (red outline), compiled by Timothy Collett as part of USGS Fact Sheet 2008-3073. Note that gas hydrate could occur in sediments both onshore and at shallow water depths

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Photograph of USGS scientists standing in front of a helicopter
December 31, 2008

Remote places

Woods Hole Coastal and Marine Science Center's Ellyn Montgomery (right) on the helipad of the Canadian Coast Guard Vessel Louis St. Laurent returning from an ice reconnaissance flight as part of a joint study mapping the foot of the continental slope in the Arctic Ocean in 2008

Shaded relief and  combined bathymetry map of Puerto Rico
December 31, 2008

Shaded relief and combined bathymetry map of Puerto Rico

(Top image) Shaded relief of the new multibeam bathymetry along the Puerto Rico Trench illuminated from the northwest. Thin contours indicate bathymetry at 500-m intervals. (Bottom image) Combined bathymetry map of the multibeam bathymetry data, single-beam bathymetry compilation around Puerto Rico, Lidar data near shore, and topography of Puerto Rico. Contour interval is

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Static stress change models
December 31, 2008

Static stress change models

Static stress change models for known or hypothesized faults in the Hispaniola and Puerto Rico subduction segments due to (a) slip on a patch of the Puerto Rico subduction zone, and (b) slip on a patch of the Hispaniola subduction zone. An open arrow denotes slip direction and the patches are marked by dashed rectangles. Heavy black lines are simplified fault traces.

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