Science Topics term usage 2007-04-22

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.)

164	river systems
62	geographic information systems (GIS)
51	earthquakes
47	volcanoes
20	earthquake occurrences
17	tectonic processes
16	water resources
15	climate change
15	contamination and pollution
12	topography
12	stream discharge
12	energy resources
11	global warming
11	maps and atlases
11	geologic history
11	earth structure
11	acid deposition
10	ground-water flow
10	streamflow
9	tsunamis
9	surface water (non-marine)
9	invasive species
9	human impacts
9	hydrology
9	geography
9	real-time monitoring and reporting
9	erosion
9	ground water
9	sediment transport
8	mineral resources
8	hydrogeology
8	hurricanes
8	animals
8	industrial pollution
8	floods
7	hazards
7	vertebrates
7	desertification
7	water cycle
7	water quality

Science Topics term usage Sunday, 2007-04-22