Lafayette College Library

Materials relating to the geology and water resources of Pennsylvania from the PA Geological Survey, U.S.G.S., and others. Includes materials from the second (1874-1889), third (1899-1919), and fourth (1919-present) geological surveys of Pennsylvania.

Part of the NOAA's National Environmental Satellite, Data and Information Service, this site provides access to wide range of services and sources for geophysical data. Areas include geomagnetism, earth observations from space, space weather and solar events, natural hazards, marine geology and geophysics, and ocean depth data.

From the Smithsonian's National Museum of Natural History, this site serves as a repository for historical and current information on volcanic events.  Includes interactive maps, images, activity reports and extensive indexes to the volcanoes of the world.

Gateway to all forecasts, watches and warnings issued by the National Weather Service. Includes 24-hour observations, weather maps, radar graphics, aviation and marine weather. 

Repository for reports and documents on the climate and the environment, produced by IPCC and component groups. 

Useful data and links on landslides, as well as how they relate to other geologic processes and hazards.

Encyclopedia on earth and its environment. Entries written by experts in non-technical language. From the National Council for Science and the Environment.

Downloadable U.S. topographic maps from the USGS.

Full text of articles reviewing the scholarly literature for a variety of topics in the physical, biomedical, and social sciences.

The nation's official repository of domestic geographic names data. Provides location information and maps for almost 2 million physical and cultural geographic features. (Information about foreign geographic feature names can be obtained from the GEOnet Names Server.)