Near-Surface Seismic Survey in the Bronx
USGS hydrologists prepare equipment for a multi-channel analysis of surface waves (MASW) land seismic imaging survey. In this picture, the accelerated weight-drop energy source (blue box) is attached to the back of a vehicle. This relatively new system allows for inexpensive and rapid data acquisiti...
Location: Bronx, NY, USA

Near-Surface Seismic Survey in the Bronx
USGS hydrologists conduct a multi-channel analysis of surface waves (MASW) land seismic imaging survey. The yellow land streamer contains the geophones and is towed behind a vehicle. This relatively new system allows for inexpensive and rapid data acquisition. The survey was conducted as part of an ...
Location: Bronx, NY, USA

Evaluating Geophysical Equipment & Methods
USGS hydrologists monitor data collection during a geophysical survey using the horizontal-to-vertical ambient-noise seismic method. This method can be used to estimate unconsolidated sediment thickness and map the bedrock surface as part of groundwater investigations. The survey was conducted as pa...
Location: RI, USA

Using GPS in the Field
USGS hydrologist collects location data using GPS during a near-surface geophysics survey. The survey was conducted as part of an applied research effort by the USGS Office of Groundwater Branch of Geophysics in 2007....
Location: CA, USA

Near-Surface Gravity Survey
A USGS hydrologist prepares equipment to conduct a gravity survey to evaluate small variations in the earth's gravity field. The USGS Office of Groundwater Branch of Geophysics develops and tests new tools and field methods to support USGS analysis of groundwater flow systems....
Location: CA, USA

Continous Seismic Profiling
The USGS collaborated with cooperator U.S. Fish & Wildlife Service to conduct continuous seismic-reflection profiling in the Havasu National Wildlife Refuge. The survey was conducted as part of an applied research and technology transfer effort by the USGS Office of Groundwater Branch of Geophysics ...
Location: CA, USA

USGS Training on Borehole Geophysical Logging
A USGS hydrologist holds an electromagnetic induction borehole logging tool while the tool is calibrated. The hydrologist was participating in a USGS class on how to use electromagnetic induction geophysical methods for groundwater investigations, conducted by the USGS Office of Groundwater Branch ...
Location: FL, USA

Electromagnetic Survey
A USGS hydrologist conducts a near-surface electromagnetic induction survey to characterize the shallow earth. The survey was conducted as part of an applied research effort by the USGS Office of Groundwater Branch of Geophysics at Camp Rell, Connecticut, in 2008....
Location: Camp Rell, CT, USA

Field Trip to the Congo
USGS scientist John Shelton using high-tech hydroacoustic equipment to measure the depth and velocity of the Congo River. ...
Location: USA

Equipment Installation
USGS scientist Game McGimsey gathers equipment for an aerial observation and gas monitoring flight....
Location: Anchorage, AK, USA

Alaska Volcano Observatory Operations
USGS scientist Tina Neal interprets real time data received in the AVO Operations room. ...
Location: Anchorage, AK, USA

Alaska Volcano Observatory Operations
USGS scientist in charge of the Alaska Volcano Observatory, Tom Murray, gets a first hand look at heightened activity on Redoubt volcano....
Location: Anchorage, AK, USA

Alaska Volcano Observatory Operations
USGS scientists Tina Neal (left) and Melissa Pfeffer (right) analyze data as it returns from several volcanos around Alaska....
Location: Anchorage, AK, USA

Gas Flight Preparation
Left to Right: USGS staff Heather Bleick, Peter Kelly and Game McGimsey gather equipment for an aerial observation and gas monitoring flight....
Location: Anchorage, AK, USA

Alaska Volcano Observatory Operations
USGS scientists Tina Neal (left) and Melissa Pfeffer (right) analyze data as it returns from several volcanos around Alaska....
Location: Anchorage, AK, USA