Science Topics term usage 2007-10-23

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.)

58	earthquakes
52	geographic information systems (GIS)
50	topography
37	volcanoes
31	fires
22	mycology
22	acid deposition
22	climate change
20	earth structure
19	mineral resources
18	human impacts
18	erosion
18	endangered species
17	earthquake occurrences
17	water supply and demand
17	desert ecosystems
16	ground water
15	global warming
14	contamination and pollution
13	topics
13	water quality
12	tectonic processes
12	land use and land cover
12	geologic history
12	droughts
12	precipitation (atmospheric)
12	sediment transport
12	energy resources
11	maps and atlases
11	floods
11	geologic structure
10	mining hazards
10	aerial photography
10	earth characteristics
10	coastal zones
9	wildlife
9	natural gas resources
9	ocean characteristics
9	real-time monitoring and reporting
9	health and disease

Science Topics term usage Tuesday, 2007-10-23