Science Topics term usage 2007-04-25

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.)

184	river systems
118	earthquakes
105	geographic information systems (GIS)
95	volcanoes
38	earthquake occurrences
30	stream discharge
29	rocks and deposits
29	floods
28	earth structure
27	energy resources
25	acid deposition
24	water quality
24	geospatial datasets
23	climate change
22	global warming
20	streamflow
19	endangered species
19	erosion
19	health and disease
18	tectonic processes
18	hydrology
18	geologic history
17	cartography
17	contamination and pollution
17	ground-water flow
17	human impacts
16	oil resources
15	hurricanes
15	water resources
14	tsunamis
14	earth characteristics
14	geologic structure
14	maps and atlases
14	global change
13	landslides
13	map coordinate systems
13	mineral resources
12	topography
12	volcanic activity
11	droughts

Science Topics term usage Wednesday, 2007-04-25