The map showing the Elder's course was prepared using maps published by the United States Coast Survey and the U. S. Geological Survey. Geographer Henry Gannett traced the route onto an existing ...

A map of Chicago, Illinois, imprinted in 1913 from the United States Geographical Survey’s historical topographic map collection. Image courtesy of the USGS Map lovers, rejoice! The United States ...

I've only seen some limited efforts on the local level in the past. The city of Seattle has been collecting landslide data since 1890, so they have a wonderful data bank of historical land-movement ...

Damaging earthquakes could strike nearly 75 percent of the U.S, new research from the U.S. Geological Survey (USGS) found. Scientists using the USGS National Seismic Hazard Model,created a color-coded ...