Science Topics term usage 2006-04-25

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.)

235	earthquakes
158	volcanoes
83	geographic information systems (GIS)
43	earthquake occurrences
40	tectonic processes
32	ground water
31	earth structure
30	energy resources
29	surface water (non-marine)
27	water quality
26	contamination and pollution
26	water properties
25	animals
25	climate change
23	floods
22	ground-water flow
22	tsunamis
21	volcanic features
21	health and disease
21	maps and atlases
20	mineral resources
20	endangered species
19	precipitation (atmospheric)
17	geologic structure
17	natural gas resources
17	landslides
16	oil resources
16	hazards
16	wildlife
16	erosion
15	rocks and deposits
15	streamflow
15	land use and land cover
15	aerial photography
15	magnetic field (earth)
15	Earth
15	nonvascular plants
14	invasive species
14	mathematical modeling
14	human impacts

Science Topics term usage Tuesday, 2006-04-25