Science Topics term usage 2008-02-21

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.)

138	earthquakes
75	geographic information systems (GIS)
56	earthquake occurrences
55	real-time monitoring and reporting
42	volcanoes
42	bats
27	acid deposition
23	contamination and pollution
20	water use
20	earth structure
19	human impacts
18	land use and land cover
16	floods
15	landslides
15	global warming
14	rocks and deposits
14	climate change
14	aquatic ecosystems
13	erosion
12	marine geology
12	geologic history
12	health and disease
12	tectonic processes
12	ground water
12	water quality
11	animals
11	energy resources
11	sediment transport
11	endangered species
11	aerial photography
10	ocean temperature
10	surface water (non-marine)
10	coal resources
10	droughts
10	ground-water flow
10	global change
9	maps and atlases
9	drainage basins
9	invasive species
9	river systems

Science Topics term usage Thursday, 2008-02-21