Science Topics term usage 2007-04-27

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.)

159	river systems
91	earthquakes
70	geographic information systems (GIS)
52	volcanoes
31	stream discharge
25	tectonic processes
24	earthquake occurrences
24	earth structure
20	climate change
20	streamflow
20	acid deposition
19	human impacts
17	floods
15	ground water
14	tsunamis
14	mineral resources
13	rocks and deposits
13	hydrology
12	maps and atlases
12	geospatial datasets
12	sea-floor characteristics
11	geologic structure
11	geologic history
11	geochemistry
11	earthquake probabilities
11	water quality
10	global warming
10	land use change
10	geophysics
10	erosion
10	topography
10	ground-water flow
10	coastal zones
10	surface water (non-marine)
10	health and disease
9	energy resources
9	water supply and demand
9	sediment transport
9	stream-gage measurement
8	ocean characteristics

Science Topics term usage Friday, 2007-04-27