USGS - science for a changing world

Science Topics

Science Topics term usage Sunday, 2007-04-29

This analysis excludes the activity of search-engine spiders, USGS users, and transactions resulting in errors.

Scripts used

1310science
73kwic
66combine

Browse terms chosen

(Table shows only the 40 most frequently chosen terms.)

107river systems
82volcanoes
75earthquakes
49geographic information systems (GIS)
28earthquake occurrences
19ground water
18earth structure
16tectonic processes
14acid deposition
13climate change
13hydrology
12hazards
11geologic history
11volcanic activity
11stream discharge
10human impacts
9floods
9earthquake probabilities
8energy resources
8contamination and pollution
8desert ecosystems
8water resources
8endangered species
7animals
7topics
7health and disease
7ecology
7population and community ecology
7earth characteristics
7erosion
6impact cratering
6global warming
6Mount Saint Helens
6water quality
6industrial pollution
6landslides
6magnetic field (earth)
6rivers
6rocks and deposits
6ecological competition

KWIC index letters chosen

bar graph showing usage of each letter

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Page Last Modified: Friday, 25-Apr-2008 17:34:56 EDT