Science Topics term usage 2006-02-15

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.)

177	earthquakes
154	volcanoes
78	geographic information systems (GIS)
72	maps and atlases
61	mineral resources
57	earth sciences
50	energy resources
47	earth characteristics
44	rocks and deposits
43	ground water
43	natural resources
42	cartography
38	water resources
38	earthquake occurrences
35	tectonic processes
33	earth structure
32	geologic history
30	natural resource management
28	surface water (non-marine)
26	human impacts
25	contamination and pollution
25	image collections
25	land surface characteristics
25	geologic structure
24	catalogs and indexes
23	datasets
23	topography
23	tsunamis
23	reports
22	ocean characteristics
21	climate change
21	birds
21	Earth
20	animals
20	health and disease
20	magnetic field (earth)
19	floods
18	wildlife
18	water quality
18	ground-water flow

Science Topics term usage Wednesday, 2006-02-15