- United States Geological Survey (USGS)
 - Official site of the USGS. - Access USGS
- Water flow, wetlands, water quality, hazards and more, from the U.S. Geological Survey.
- Arid and Semi-Arid Environments
- Image products and information generated using remote sensing.
- Ask-A-Geologist
- Do you have a question about volcanoes, earthquakes, mountains, rocks, maps, ground water, lakes, or rivers? Email your earth science questions to a U.S. Geological Survey earth scientist.
- Biological Resources Division (8)
- Earth Resources Observation Systems (EROS) Data Center
- USGS EROS manages the huge and growing base of earth science data and images gathered from Earth orbiting satellites.
- Geologic Hazards Team
- Information on hazards related to earthquakes, landslides, and geomagnetism.
- National Strong-Motion Program
- Dedicated to investigating strong earthquake shaking at soil and rock sites throughout the U.S., and its potential impact on engineered structures
- U.S. Geographic Names Information System
- Find out where a city or other feature such as a mountain or lake is in the United States.
- U.S. Geological Survey Volcano Hazards Program (5)
- UNEP/GRID@
- United States Geological Survey Bulletin 1928
- Detailing the early Triassic ammonoid-bearing Union Wash formation in Inyo County, CA.
- USGS Earthquake Hazards Program (5)
- Explore the USGS Earthquake Hazards Programme through sites which offer databases of earthquakes, seismological updates, maps, monitoring methods, and predictions of seismic events as researched and developed by the U.S. Geological Survey.
- USGS Employment
- Offers job openings, student employment, and volunteer opportunities.
- USGS Energy Resources Program (3)
- USGS Flagstaff Field Center@
- USGS Information for Visitors to Atlanta
- Information for Atlanta and surrounding areas. Includes maps, geologic setting, and water resources.
- USGS Internet Resources
- USGS Learning Web
- Developed by the U.S. Geological Survey and dedicated to K-12 and lifelong learning about the land, water, plants, animals, and maps.
- USGS Marine and Coastal Geology Program (3)
- USGS Mineral Resources Program (5)
- USGS National Map Seamless Data Distribution System
- Provides custom-generated digital products based on user-specified geographic extents and user-specified datasets.
- USGS National Map Viewer
- Interactive topographic map from the USGS that reveals the U.S.'s geology, hydrology, land use, natural hazards, and transportation infrastructure.
- USGS National Mapping Information
- National mapping programme, mapping products and services, geographic analysis and monitoring, land remote sensing, and science impact.
- USGS Newsroom
- Features the agency's latest news releases on geological and environmental findings and issues.
- USGS Pasadena Field Office@
- USGS Spectroscopy Lab
- Researching and applying methods for identifying and mapping materials using spectroscopic remote sensing on the earth and throughout the solar system.
- USGS Water Resources Division (14)
- USGS: Geographic Analysis and Monitoring Program
- Programme to improve understanding of the rates, causes, and consequences of natural and human-induced processes that shape the landscape over time.
- USGS: Retirement Calculator
- Tool to calculate the basic annuity, retirement eligibility, and survivor benefits for employees in the FERS, CSRS, or CSRS-offset retirement system. By the United States Geological Survey.
- Western Region Marine and Coastal Surveys
- Woods Hole Field Center@
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