Science Topics term usage 2008-01-31

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.)

76	earthquakes
58	geographic information systems (GIS)
38	volcanoes
33	coral reefs
33	earthquake occurrences
26	human impacts
25	earth structure
24	acid deposition
23	animals
20	climate change
20	contamination and pollution
20	geologic history
18	health and disease
18	surface water (non-marine)
18	energy resources
17	aquatic ecosystems
17	water quality
17	topography
17	rocks and deposits
16	mineral resources
15	tectonic processes
15	geochemistry
14	erosion
14	tsunamis
13	volcanic activity
13	global warming
13	chemical elements
13	streamflow
13	maps and atlases
13	ground water
13	droughts
12	real-time monitoring and reporting
12	ground-water flow
12	cartography
11	river systems
11	hazards
11	earth characteristics
11	stratigraphic sections
11	floods
11	ecosystems

Science Topics term usage Thursday, 2008-01-31