Science Topics term usage 2007-09-30

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.)

55	geographic information systems (GIS)
52	drainage basins
49	volcanoes
48	earthquakes
20	contamination and pollution
16	acid deposition
15	earthquake occurrences
15	tectonic processes
15	ground-water flow
14	earth structure
13	geologic history
13	stream discharge
13	health and disease
12	climate change
12	human impacts
11	tsunamis
11	real-time monitoring and reporting
10	geologic structure
10	river systems
9	ground water
9	relative abundance analysis
8	energy resources
8	nutrient content (water)
7	earth characteristics
7	aerial photography
7	grassland ecosystems
7	volcanic activity
7	animals
7	landslides
7	endangered species
7	water circulation
7	stream-gage measurement
7	topography
6	marine biology
6	cartography
6	global change
6	water chemistry
6	atmospheric sciences
6	coastal zones
6	global warming

Science Topics term usage Sunday, 2007-09-30