Science Topics term usage 2006-05-02

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.)

199	earthquakes
169	volcanoes
79	tectonic processes
68	geographic information systems (GIS)
52	energy resources
41	animals
39	mineral resources
39	earth structure
36	ground water
35	earthquake occurrences
33	surface water (non-marine)
32	oil resources
30	geologic history
28	droughts
28	floods
28	tsunamis
26	aerial photography
25	water quality
25	natural gas resources
23	erosion
21	climate change
21	coastal zones
20	storms
20	maps and atlases
20	ground-water flow
19	human impacts
19	acid deposition
18	mammals
18	contamination and pollution
18	land surface characteristics
17	ecological competition
17	hazards
17	seismology
17	health and disease
17	invasive species
16	streamflow
16	earthquake probabilities
16	rocks and deposits
15	ocean characteristics
15	seismic refraction method

Science Topics term usage Tuesday, 2006-05-02