Science Topics term usage 2007-01-18

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.)

116	geographic information systems (GIS)
112	earthquakes
101	volcanoes
60	dinosaurs
41	earthquake occurrences
30	mineral resources
26	acid deposition
25	earth structure
24	karst areas
24	tectonic processes
22	human impacts
20	tsunamis
19	energy resources
19	geologic structure
19	ground water
18	floods
18	contamination and pollution
17	oil resources
16	ground-water flow
15	hurricanes
15	land use and land cover
13	map coordinate systems
13	surface water (non-marine)
13	climate change
13	landslides
12	rocks and deposits
12	endangered species
12	geologic history
12	precipitation (atmospheric)
12	ocean characteristics
12	streamflow
11	stream-gage measurement
11	magnetic field (earth)
11	sea-floor characteristics
11	ecosystems
11	water resources
11	hazards
10	coastal zones
10	volcanic features
10	erosion

Science Topics term usage Thursday, 2007-01-18