USGS - science for a changing world

Science Topics

Science Topics term usage Saturday, 2008-01-19

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

Scripts used

651science
99combine
60kwic

Browse terms chosen

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

40geographic information systems (GIS)
22volcanoes
17earthquakes
15deltas
10real-time monitoring and reporting
10earth structure
10earthquake occurrences
9acid deposition
7image collections
7magnetic field (earth)
7echinoderms
6luminescence dating
6geologic history
6water supply and demand
5ocean sciences
5marine ecosystems
5impact cratering
5erosion
5health and disease
5precipitation (atmospheric)
5floods
5ground-water flow
5invasive species
5maps and atlases
4core (earth)
4ocean characteristics
4water quality
4magnetic storms
4hydrology
4volcanic activity
4surface water (non-marine)
4human impacts
4topography
3river systems
3sediment transport
3desert ecosystems
3social sciences
3drainage basins
3aquatic ecosystems
3contamination and pollution

KWIC index letters chosen

bar graph showing usage of each letter

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Page Last Modified: Friday, 25-Apr-2008 17:35:00 EDT