Science Topics term usage 2007-01-23

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.)

141	geographic information systems (GIS)
127	earthquakes
104	volcanoes
38	inland fishery resources
35	tectonic processes
33	earthquake occurrences
29	earth structure
24	contamination and pollution
23	ground water
20	water resources
19	energy resources
19	climate change
18	wildlife biology
17	human impacts
17	rocks and deposits
17	volcanic activity
17	surface water (non-marine)
17	mineral resources
16	field methods
15	streamflow
15	water quality
15	population and community ecology
14	floods
14	land use and land cover
14	aquatic ecosystems
13	tsunamis
13	acid deposition
13	health and disease
12	hurricanes
12	animals
12	global change
12	magnetic field (earth)
12	map coordinate systems
11	water properties
11	topography
11	outer core (earth)
11	precipitation (atmospheric)
11	ground-water flow
11	endangered species
11	maps and atlases

Science Topics term usage Tuesday, 2007-01-23