Science Topics term usage 2009-04-30

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.)

539	earthquakes
269	earthquake occurrences
202	volcanoes
105	maps and atlases
83	real-time monitoring and reporting
56	USGS map servers
51	floods
51	avian influenza
48	topographic maps
46	climate change
38	mineral resources
37	surface water (non-marine)
35	geospatial analysis
35	energy resources
30	water quality
30	ground water
24	contamination and pollution
21	human impacts
21	invasive species
21	remote sensing
20	environmental health (human)
18	fires
18	droughts
17	geologic maps
17	seismology
15	volcanic activity
14	erosion
12	global warming
12	river systems
11	acid deposition
10	land use change
10	tectonic processes
10	hydrology
10	health and disease
10	stream-gage measurement
10	ocean characteristics
9	snow and ice cover
9	streamflow
8	mountains
8	rocks and deposits

Science Topics term usage Thursday, 2009-04-30