Science Topics term usage 2009-06-18

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.)

419	earthquakes
183	earthquake occurrences
147	volcanoes
108	real-time monitoring and reporting
101	maps and atlases
62	USGS map servers
56	ground water
53	surface water (non-marine)
41	floods
38	topographic maps
37	mineral resources
36	climate change
36	energy resources
34	water quality
33	remote sensing
25	invasive species
25	contamination and pollution
25	geospatial analysis
23	avian influenza
17	droughts
17	geologic maps
17	environmental health (human)
14	fires
13	earthquake probabilities
12	seismology
12	river systems
12	hydrology
11	streamflow
10	life sciences
10	USGS maps on demand
10	geographic information systems (GIS)
10	seismic methods
10	ground-water quality
10	transect sampling
9	earth structure
8	hazards
8	water chemistry
8	aerial photography
8	acid deposition
8	ground-water flow

Science Topics term usage Thursday, 2009-06-18