Science Topics term usage 2008-04-20

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.)

1086	earthquakes
508	earthquake occurrences
159	volcanoes
152	maps and atlases
100	real-time monitoring and reporting
61	mineral resources
60	floods
58	energy resources
54	USGS map servers
46	droughts
46	climate change
46	earthquake probabilities
43	surface water (non-marine)
42	ground water
40	geospatial analysis
39	water quality
37	contamination and pollution
35	invasive species
35	avian influenza
33	environmental health (human)
33	remote sensing
31	fires
29	seismology
17	tectonic processes
16	volcanic activity
15	oil resources
13	hydrology
13	river systems
12	magnetic field (earth)
12	human impacts
12	earth structure
11	natural gas resources
11	streamflow
10	acid deposition
10	toxic trace element contamination
9	tsunamis
9	aerial photography
9	erosion
9	ground-water flow
8	geologic history

Science Topics term usage Sunday, 2008-04-20