Science Topics term usage 2009-04-22

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.)

537	earthquakes
241	volcanoes
214	earthquake occurrences
144	maps and atlases
107	real-time monitoring and reporting
89	USGS map servers
73	ground water
63	energy resources
61	surface water (non-marine)
57	floods
52	remote sensing
52	water quality
47	climate change
47	contamination and pollution
47	mineral resources
44	geospatial analysis
43	topographic maps
39	droughts
34	invasive species
27	environmental health (human)
25	earthquake probabilities
23	avian influenza
21	geologic maps
18	river systems
18	oil resources
16	human impacts
16	fires
16	ground-water flow
14	natural gas resources
14	surface water quality
13	seismology
13	acid deposition
12	earth structure
12	plants (organisms)
11	stream-gage measurement
11	animals
11	transect sampling
10	soil resources
10	tectonic processes
10	geologic history

Science Topics term usage Wednesday, 2009-04-22