Science Topics term usage 2007-10-26

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.)

172	aerial photography
56	geographic information systems (GIS)
46	streamflow
45	earthquakes
32	volcanoes
20	ground-water flow
20	acid deposition
19	earthquake occurrences
17	earth structure
17	human impacts
17	ground water
16	climate change
14	health and disease
13	precipitation (atmospheric)
13	water quality
13	mineral resources
13	geospatial datasets
13	fires
12	animals
12	geologic structure
11	tsunamis
11	global change
11	gravitational field (earth)
11	coastal zones
11	geologic history
11	rocks and deposits
11	land use and land cover
10	maps and atlases
10	global warming
10	invasive species
10	real-time monitoring and reporting
10	water resources
10	droughts
10	tectonic processes
10	endangered species
9	desert ecosystems
9	geochemistry
9	sediment transport
9	glaciation
9	water supply and demand

Science Topics term usage Friday, 2007-10-26