Science Topics term usage 2007-01-19

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.)

121	geographic information systems (GIS)
93	earthquakes
77	volcanoes
44	stratigraphy
34	earthquake occurrences
33	animals
27	geology
21	earth structure
21	tectonic processes
21	tsunamis
20	seismology
19	human impacts
19	maps and atlases
19	climate change
19	contamination and pollution
18	geologic history
17	water quality
17	dinosaurs
17	sea-floor characteristics
17	floods
16	rocks and deposits
15	magnetic field (earth)
15	acid deposition
14	mineral resources
13	land use and land cover
13	geologic structure
13	energy resources
12	invasive species
12	sediment transport
11	volcanic activity
11	earthquake probabilities
11	hazards
11	surface water (non-marine)
10	global change
10	hurricanes
10	ground-water flow
10	ground water
9	land use change
9	aerial photography
9	hydrology

Science Topics term usage Friday, 2007-01-19