Images

Schematic geologic cross section of Southern Oʻahu showing groundwater–seawater interaction in the vicinity of Honolulu, HI (modified from Frans et al., 2012).

Wave-driven flooding and overwash on Roi-Namur Atoll, Republic of the Marshall Islands

After dam removal on the Elwha River, the site of a previous survey had finer grained sediment. Surveyor in the distance is James Starr of the USGS Washington Water Science Center.

Satellite image of Hawaiʻi captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite on January 26, 2014

Interactive map (here with added labels) allows viewers to zoom into areas of interest; video tracklines appear in purple and photograph locations (dots) in red. (At scales shown here, red dots are too closely spaced to distinguish.) Clicking on a trackline starts video in the lower-left window and associated photographs in the lower-right window.

A wall of Desmophyllum dianthus cup corals with bonus octopus neighbor.

BOBSled with its major components labeled. The system collects high-definition (HD) video images of seafloor as deep as 100 meters and is easily hand deployed from a small boat. The video imagery is viewed and recorded in real time at the surface.

Six of 12 map sheets included in the USGS CSMP map-set publication “Hueneme Canyon and Vicinity,” the first CSMP Santa Barbara Channel map set to be published. A, bathymetry; B, seafloor character; C, perspective views; D, potential habitats; E, shallow subsurface geology and structure; F, offshore-onshore geology and geomorphology.

Assemblage of invertebrates living on a steep submarine canyon wall, seen during the Deepwater Canyons 2013 - Pathways to the Abyss.

Northwestern Washington, showing locations of Puget Sound, Hood Canal, and Lynch Cove. Boundaries of Olympic National Park are outlined in red.

An inflatable boat floating above a submarine groundwater vent was used as a multi-day mooring platform for making time-series measurements of the naturally occurring groundwater tracers radon (²²²Rn) and thoron (²²⁰Rn). Gray surface buoys closer to the beach mark locations of thermistor arrays and wave/tide gauges.

BOBSled suspended by its tow cable. The tow cable has one single-mode fiber-optic line for video transmission, eight conductors for system power and control, a Kevlar layer for strength, and a urethane jacket for abrasion resistance and water exclusion.

Photo for upcoming seminar titled, “Sediment delivery across the bay-marsh interface of an estuarine salt marsh,” by Jessie Lacy.

Image of ripples in sand, next to a rocky surface on the seafloor 2.5 km (1.5 miles) offshore San Mateo County, California at a depth of 24.6 meters (81 feet). The two red dots in the image (from lasers mounted on the camera and used as reference points) are 15 cm (6 inches) apart.

Aerial photograph of the mouth of the Elwha River where it meets the Strait of Juan de Fuca during the removal of the Elwha and Glines Canyon dams, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.

Loading the research vessel (R/V) Centennial at its home port, Friday Harbor Laboratories, University of Washington, on San Juan Island, Washington.

USGS scientists Peter Swarzenski and Cordell Johnson deploying a 3-meter (10 foot) kasten corer off R/V Centennial.

View toward the Olympic Mountains from the R/V Centennial in Hood Canal, Washington.

Two thermal infrared (TIR) images of a submarine groundwater vent site off west Maui showing the influence of tides on the spatial extent of submarine groundwater discharge. Top, Image taken at high tide. Bottom, Image taken a low tide.

PCMSC research vessel Karluk

Estuarine salt marsh at China Camp State Park looking towards San Pablo Bay, northern San Francisco, California.