Biological and physical processes
All continuing activities, functions, and phenomena associated with organisms and non-living matter.
Drought watch Pacific Northwest states: Washington, Oregon, Idaho [ More info] Drought water homepage with links to maps showing streamflow conditions, drought definitions, resources, publications, and answers to Frequently Asked Questions (FAQs).
Duration and current conditions graphs for selected Pennsylvania sites [ More info] Plots of streamflow averages and ground water depths for selected hydrologic sites in Pennsylvania.
Early results from the Northern Gulf of Mexico Ecosystem Change and Hazard Susceptibility Project [ More info] A coordinated set of studies shows development of coastal features, aspects of marine water quality, and impacts of hurricanes along this section of important coastline.
Earth science photographic archive [ More info] Photographic archive collection from the USGS Photo Library. Photos dated 1868-1992 are of geology, earthquake damage, national parks, pioneer photographers, St. Helens eruption and mining and available at 100, 700 and 1400 dots/inch resolution.
Earth tides and volcano monitoring [ More info] Article in the May 28, 1998 issue of Volcano Watch describing of correlation of earth tides to volcanic eruptions and value in monitoring underground magma movement with deformation measurement instruments including tiltmeters and strainmeters.
Earthquake "Top 10" Lists & Maps [ More info] Lists of largest earthquakes in the world and in the United States, earthquake facts and statistics, deaths from earthquakes, earthquakes by magnitude, and significant earthquakes.
Earthquake and fault data for Google Earth [ More info] Downloadable data for earthquakes and faults for use with the Google Earth software
Earthquake Geology and Paleoseismology [ More info] Geological effects of earthquakes on the crust and landscape, with studies of prehistoric earthquake activity using geological evidence.
Earthquake glossary [ More info] Dictionary of terms associated with earthquakes with simple definitions and photographs especially suited for students.
Earthquake hazard in the New Madrid seismic zone remains a concern [ More info] GPS measurements made since 1996 seem to show this earthquake-prone area slowing down. Is it time to relax? Scientists who studied these data in detail say no, and this fact sheet explains why.
Alphabetical Index of Topics
a b c d e f g h i j k l m n o p q r s t u v w x y z