T&D

U.S. Geological Survey Makes Topographic Maps Available Using GeoPDF

The U.S. Geological Survey is using TerraGo Technologies' GeoPDF format to make its primary base series quadrangle maps available online. The USGS GeoPDF maps can be ...
Circle of Blue

USGS Map Reveals Long-Term Changes in America’s Groundwater Quality

Chloride and nitrate concentrations are rising and arsenic levels are holding steady or falling. Those are two of the conclusions from a U.S. Geological Survey assessment of changes in the nation’s ...
Oil

USGS revised seismic-risk maps to add induced earthquake potential

The US Geological Survey added induced seismicity to its seismic-risk maps, the agency said Mar. 28, citing a sharp rise in earthquakes associated with wastewater disposal wells, especially in ...
Inverse

Hawaii Volcano Kilauea: New USGS Maps Capture Lava Flows and Spread

The US Geological Survey (USGS) has published a new set of maps to observe the destruction caused by Hawaii’s Volcano Kilauea. The government agency continues to publish maps at a fast cadence as they ...