Science Topics term usage 2009-05-07

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.)

451	earthquakes
198	earthquake occurrences
175	volcanoes
127	maps and atlases
122	real-time monitoring and reporting
59	floods
58	USGS map servers
57	climate change
51	topographic maps
49	energy resources
49	ground water
48	surface water (non-marine)
47	mineral resources
45	geospatial analysis
43	water quality
36	avian influenza
35	contamination and pollution
34	droughts
34	earthquake probabilities
32	remote sensing
31	invasive species
28	fires
25	geologic maps
22	environmental health (human)
18	human impacts
17	animals
16	acid deposition
16	oil resources
14	earth structure
14	river systems
14	health and disease
13	desert ecosystems
13	streamflow
12	global warming
11	seismology
10	snow and ice cover
10	ground-water quality
10	stream discharge
10	land use and land cover
10	aquatic ecosystems

Science Topics term usage Thursday, 2009-05-07