Science Topics term usage 2007-02-26

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.)

138	earthquakes
101	geographic information systems (GIS)
100	geologic history
90	volcanoes
40	earthquake occurrences
23	acid deposition
22	energy resources
21	mineral resources
19	oil resources
19	tectonic processes
18	tsunamis
17	climate change
17	earth structure
17	aerial photography
16	ground water
15	rocks and deposits
15	ground-water flow
15	contamination and pollution
14	health and disease
14	surface water (non-marine)
13	earthquake probabilities
13	maps and atlases
12	global warming
12	erosion
12	human impacts
11	streamflow
10	geology
10	map coordinate systems
10	geologic structure
10	seismology
10	land use and land cover
10	earth history
10	California
10	earth characteristics
9	gravitational field (earth)
9	water use
9	precipitation (atmospheric)
9	magnetic field (earth)
9	invasive species
9	wetland ecosystems

Science Topics term usage Monday, 2007-02-26