Science Topics term usage 2009-04-20

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.)

428	earthquakes
208	volcanoes
168	earthquake occurrences
151	maps and atlases
96	real-time monitoring and reporting
76	floods
72	USGS map servers
65	topographic maps
60	climate change
54	surface water (non-marine)
53	water quality
52	energy resources
51	ground water
46	mineral resources
45	geospatial analysis
41	contamination and pollution
38	droughts
35	remote sensing
30	invasive species
29	avian influenza
23	animals
22	geologic maps
22	surface water quality
20	acid deposition
20	environmental health (human)
19	endangered species
19	ground-water flow
19	earthquake probabilities
18	global warming
18	hydrology
18	river systems
17	health and disease
16	natural gas resources
15	human impacts
14	ecosystems
14	streamflow
14	seismology
13	earth structure
12	aerial photography
12	ground-water quality

Science Topics term usage Monday, 2009-04-20