Science Topics term usage 2007-12-18

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	landslides
56	earthquakes
40	geographic information systems (GIS)
37	volcanoes
24	earthquake occurrences
23	acid deposition
18	aerial photography
18	endangered species
17	contamination and pollution
17	erosion
16	climate change
16	tectonic processes
15	global change
14	earth structure
14	global warming
13	mathematical modeling
13	animals
12	energy resources
12	hurricanes
11	precipitation (atmospheric)
11	aquatic ecosystems
11	rocks and deposits
11	ocean characteristics
11	floods
10	gravitational field (earth)
10	invasive species
10	planetary bodies
9	magnetic field (earth)
9	water cycle
9	health and disease
9	tsunamis
9	natural gas resources
9	ground-water flow
9	water quality
9	human impacts
9	plants (organisms)
8	streamflow
8	meteorites
8	water supply and demand
8	real-time monitoring and reporting

Science Topics term usage Tuesday, 2007-12-18