Science Topics term usage 2006-04-23

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.)

106	earthquakes
92	volcanoes
45	energy resources
43	geographic information systems (GIS)
28	tectonic processes
23	streamflow
22	earthquake occurrences
22	surface water (non-marine)
21	geologic history
21	ground water
21	rocks and deposits
17	acid deposition
17	mineral resources
17	hydrology
17	landslides
16	human impacts
16	cartography
15	earth structure
15	climate change
14	oil resources
14	aerial photography
14	geologic structure
14	ground-water flow
14	water quality
14	floods
13	economic geology
13	erosion
13	real-time monitoring and reporting
13	mathematical modeling
13	ecosystems
13	natural resources
12	geochemistry
12	global change
11	meteorites
11	plants (organisms)
11	biogeography
11	topics
10	stratigraphy
10	water supply and demand
10	habitats

Science Topics term usage Sunday, 2006-04-23