Images

Hydrologists Carole Johnson and Alton Anderson (USGS) prepare a borehole nuclear magnetic resonance (NMR) tool for logging.

USGS scientists J. Alton Anderson and Dennis W. Risser prepare to collect a full-waveform sonic log from a 1,000-foot deep stratigraphic test hole drilled by the Pennsylvania Geological Survey at the edge of a Marcellus Shale production well pad in Lycoming County, PA.

Tropical Storm Lee 24-hour precipitation map

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

USGS Hydrologist, Guy Foster collects a sample of blue-green algae in Milford Lake, Kansas.

Bald Eagle Lake near the Twin Cities, Minnesota. 

A breach in the coastline of Rodanthe, North Carolina, caused by Hurricane Irene in 2011.  Repeated storm impacts, combined with sea level rise, make the development and improvement of models that help forecast coastal change very important to planners working to build more resilient communities

Storm surge sensor installation prior to Hurricane Irene landfall

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  Water samples were collected from each of the bottles and analyzed shipboard.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

USGS employee Ben Beal conducts stream discharge and velocity measurements at USGS gage 10297010 Topaz Canal below Topaz Lake near Topaz, CA .

These are baydzherakhs that form when Pleistocene-aged ice wedges thaw and leave behind a mound of unfrozen soil that is easily susceptible to decomposition. This sediment has not thawed for at least 40,000 years.

Sampling surface waters on Lake Michigan using a Kemmerer Water Sampler

Electrofishing from a boat, Big Cypress Creek, Texas, July 27, 2011. Photograph taken by Justin A. McInnis, U.S. Geological Survey.

SIR 2013–5058

Cypress tree near Big Cypress Creek, Texas, July 27, 2011. Photograph taken by James B. Moring, U.S. Geological Survey.

SIR 2013–5058

Cypress knees, Big Cypress Creek, Texas, July 27, 2011. Photograph taken by James B. Moring, U.S. Geological Survey.

SIR 2013–5058

Electrofishing from a barge, Big Cypress Creek, Texas, July 27, 2011. Photograph taken by Erin C. Sewell, U.S. Geological Survey.

SIR 2013–5058

Measuring physical characteristics, Big Cypress Creek, Texas, July 26, 2011. Photograph taken by James B. Moring, U.S. Geological Survey.

SIR 2013–5058

Colorado River, and Roaring Fork River confluence, Glenwood Springs, Garfield County, Colorado 1 by Alan Cressler