Science Topics term usage 2007-10-20

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.)

49	geographic information systems (GIS)
40	volcanoes
34	earthquakes
34	climatology
19	sediment transport
18	ground water
18	topography
18	earth structure
18	energy resources
17	aerial photography
17	climate change
16	human impacts
15	stream-gage measurement
15	water quality
15	contamination and pollution
14	computational methods
13	desert ecosystems
13	surface water (non-marine)
13	mathematical modeling
13	water properties
13	invasive species
12	cartography
12	global warming
12	ecological processes
12	biodiversity
12	earthquake occurrences
12	geologic history
12	marine geology
12	sea-floor characteristics
12	maps and atlases
11	reservoirs
11	real-time monitoring and reporting
11	ecosystems
11	mineral resources
11	ground-water flow
11	rocks and deposits
11	habitats
11	plants (organisms)
11	snow and ice cover
11	geologic structure

Science Topics term usage Saturday, 2007-10-20