Science Topics term usage 2006-04-20

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.)

273	volcanoes
165	earthquakes
80	geographic information systems (GIS)
37	tectonic processes
37	earthquake occurrences
36	real-time monitoring and reporting
36	ground water
32	earth structure
29	tsunamis
28	landslides
28	floods
28	energy resources
28	surface water (non-marine)
27	ground-water flow
26	maps and atlases
25	aerial photography
25	contamination and pollution
25	animals
22	mineral resources
21	streamflow
21	climate change
20	geologic history
20	water quality
19	outer core (earth)
18	hydrology
18	glaciation
17	wildlife
17	volcanic activity
17	cartography
17	water use
16	land use and land cover
16	natural resource extraction
16	magnetic field (earth)
15	invasive species
15	mathematical modeling
15	storms
15	water chemistry
15	hazards
14	endangered species
14	rocks and deposits

Science Topics term usage Thursday, 2006-04-20