Science Topics term usage 2007-02-02

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.)

104	volcanoes
89	geographic information systems (GIS)
87	earthquakes
70	oxygen content (water)
29	hydrology
27	earth sciences
26	acid deposition
25	earth structure
24	earthquake occurrences
22	water resources
20	tectonic processes
20	contamination and pollution
20	maps and atlases
19	climate change
19	tsunamis
17	floods
17	human impacts
17	ground water
16	hurricanes
16	global change
16	energy resources
14	landslides
14	mineral resources
13	endangered species
13	stream-gage measurement
13	surface water (non-marine)
12	fires
12	seismology
12	natural gas resources
12	global warming
12	ocean characteristics
11	oil resources
11	magnetic field (earth)
10	geologic processes
10	geospatial analysis
10	water quality
10	erosion
10	animals
9	land use and land cover
9	coastal zones

Science Topics term usage Friday, 2007-02-02