Science Topics term usage 2006-04-28

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.)

213	earthquakes
177	volcanoes
64	geographic information systems (GIS)
56	earthquake occurrences
42	energy resources
32	surface water (non-marine)
31	water resources
31	oil resources
31	ground water
30	geochemistry
29	rocks and deposits
29	streamflow
28	droughts
27	tectonic processes
25	tsunamis
24	contamination and pollution
23	ground-water flow
23	floods
23	geologic structure
22	water quality
21	climate change
21	acid deposition
21	animals
19	ocean characteristics
19	mineral resources
19	earth structure
18	remote sensing
17	land surface characteristics
17	fires
17	aerial photography
16	landslides
15	erosion
15	natural resource extraction
15	health and disease
15	global change
15	invasive species
15	earthquake probabilities
15	precipitation (atmospheric)
15	magnetic field (earth)
15	storms

Science Topics term usage Friday, 2006-04-28