Science Topics term usage 2007-01-02

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

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

83	geographic information systems (GIS)
58	earthquakes
37	volcanoes
24	nonpoint-source pollution
18	earthquake occurrences
17	ground water
16	earth structure
15	tectonic processes
15	land use and land cover
15	acid deposition
14	rocks and deposits
14	mineral resources
13	magnetic field (earth)
13	hydrologic processes
13	maps and atlases
12	aerial photography
11	energy resources
11	surface water (non-marine)
11	coastal zones
10	topography
10	oil resources
10	geologic structure
10	climate change
9	sediment transport
9	impact cratering
9	human impacts
9	ground-water flow
9	land use change
9	geologic history
9	contamination and pollution
8	snow and ice cover
8	floods
8	planetary bodies
8	river systems
8	map coordinate systems
7	habitat alteration
7	tsunamis
7	global change
7	geophysics
7	geography

Science Topics term usage Tuesday, 2007-01-02