Images

USGS staffer collecting groundwater sample on Long Island

The large white radar dome is a former Distant Early Warning Line site, which sits atop a permafrost bluff on Barter Island, Alaska.

East-Central Adirondack Stream in New York

Stream gaging station on North Buck Creek, NY

Equipment for Monitoring the Flow, Chemistry and Macroinvertebrates of Streams throughout the Adirondack Ecoregion

Tangled web of prop roots from red mangrove trees, intermixed with black mangroves and white mangroves farther back in the forest.  Mangrove forests cover much of the southwestern coastal region of Everglades National Park.  The red mangroves are the most salinity tolerant and grow with their prop roots in the water or within the range of high tide.

Borehole Fluid Logging in Bangladesh

Hydrographer wading through flood waters to service a streamgage

USGS NYWSC staffer making flowtracker measurement ona  flooded street in Ithaca, NY

USGS scientist making a discharge measurement in Bellmore Creek, Long Island

This photo shows USGS gaging station 01055000 on the Swift River near Roxbury, Maine. 

The USGS monitors the Narraguagus River at Cherryfield, Maine at a location called Cable Pool. This spot was once renowned for Atlantic salmon, where anglers would line the banks, waiting their turn to cast a line into the water.

Location of earthquakes as a function of depth and size in the northeastern Caribbean.

Comparison of observed near-bed velocities and modeled near-bed velocities using several bottom-roughness formulations. Velocity vectors are overlaid on map of backscatter from the sea floor showing regions with coarse sand (light color) and fine sand (dark colors). White lines are bathymetry contours.

Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)

The Instrumented Pressure Testing Chamber (IPTC). A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions

Shaded relief image of Northern Cape Cod Bay, MA

Map of the island of Hispaniola that include the countries of Haiti and the Dominican Republic. Fault traces are shown as lines with the following descriptions: barbed=thrust fault; solid=strike-slip fault with arrows showing relative direction of motion; black and white=normal fault.

Methane seeping on the Virginia margin just shallower than the limit for gas hydrate stability. 

Water molecules (1 red oxygen and 2 white hydrogens) form a pentagonal dodecahedron around a methane molecule (1 gray carbon and 4 green hydrogens). This represents 2 of the 8 parts of the typical Structure I gas hydrate molecule.

Map of the Northeastern Caribbean: topography is in shades of green and bathymetry in shades of blue. Fault traces are shown as lines with the following descriptions: barbed=thrust fault; solid=strike-slip fault with arrows showing relative direction of motion; black and white=normal fault. Faults outlined in red have a potential to generate a large earthquake.