Science Topics term usage 2009-04-23

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.)

616	earthquakes
323	earthquake occurrences
208	volcanoes
134	maps and atlases
115	real-time monitoring and reporting
58	USGS map servers
55	topographic maps
54	climate change
54	energy resources
52	mineral resources
51	water quality
46	floods
41	ground water
36	contamination and pollution
34	fires
33	surface water (non-marine)
31	geospatial analysis
28	droughts
27	remote sensing
26	invasive species
25	environmental health (human)
24	avian influenza
21	geologic maps
20	acid deposition
18	river systems
17	seismology
17	animals
16	human impacts
16	surface water quality
14	earthquake probabilities
13	oil resources
13	hazards
13	hydrology
13	coal resources
13	health and disease
12	ground-water flow
12	desert ecosystems
12	natural gas resources
12	stream discharge
11	endangered species

Science Topics term usage Thursday, 2009-04-23