Science Topics term usage 2007-05-13

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.)

88	river systems
53	geographic information systems (GIS)
46	earthquakes
37	volcanoes
17	stream discharge
17	earthquake occurrences
16	geologic history
16	rocks and deposits
12	earth structure
11	maps and atlases
11	acid deposition
9	tectonic processes
9	hazards
8	erosion
8	streamflow
8	global warming
8	hydrology
8	surface water (non-marine)
7	human impacts
7	animals
6	ecosystems
6	volcanic activity
6	rivers
6	floods
6	sea-floor characteristics
6	mineral resources
6	geologic structure
5	crust (earth)
5	seismic methods
5	contamination and pollution
5	water resources
5	endangered species
5	landslides
5	ground water
5	volcanic eruption prediction
5	magnetic field (earth)
5	earth sciences
5	land regions
5	metallic ores
5	river reaches

Science Topics term usage Sunday, 2007-05-13