Science Topics term usage 2007-11-16

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.)

74	geographic information systems (GIS)
56	geospatial analysis
55	earthquakes
40	volcanoes
23	earthquake occurrences
18	animals
18	earth structure
16	climate change
16	acid deposition
14	desert ecosystems
13	contamination and pollution
13	invasive species
13	tectonic processes
13	ground-water flow
13	streamflow
13	mineral resources
12	aquatic ecosystems
12	global warming
12	mercury contamination
12	sediment transport
11	stream-gage measurement
10	floods
10	water supply and demand
10	geography
10	health and disease
10	precipitation (atmospheric)
10	tsunamis
9	magnetic field (earth)
9	field methods
9	rocks and deposits
9	impact cratering
9	North America
9	seismic methods
9	land use and land cover
9	water quality
9	ecosystems
9	social sciences
9	droughts
9	mathematical modeling
8	ground water

Science Topics term usage Friday, 2007-11-16