Science Topics term usage 2008-02-06

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.)

62	earthquakes
55	geographic information systems (GIS)
41	volcanoes
38	rubidium-strontium analysis
31	earthquake occurrences
22	stream-gage measurement
21	climate change
21	earth structure
20	nonmetallic mineral resources
18	rocks and deposits
18	acid deposition
18	streamflow
17	erosion
15	floods
15	aerial photography
15	tsunamis
14	real-time monitoring and reporting
14	geologic structure
14	human impacts
14	contamination and pollution
13	tectonic processes
13	drainage basins
13	natural resource management
12	global warming
11	topography
11	biogeography
11	gravitational field (earth)
11	earth characteristics
11	water cycle
11	toxic trace element contamination
11	ecosystems
11	magnetic field (earth)
11	precipitation (atmospheric)
11	health and disease
10	aquatic ecosystems
10	energy resources
10	geologic history
10	mineral resources
10	map coordinate systems
10	volcanic activity

Science Topics term usage Wednesday, 2008-02-06