Science Topics term usage 2007-10-01

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.)

174	volcanoes
100	earthquakes
93	geographic information systems (GIS)
58	pesticide and herbicide contamination
55	real-time monitoring and reporting
36	earthquake occurrences
29	tectonic processes
27	earth structure
25	volcanic activity
22	drainage basins
21	contamination and pollution
21	acid deposition
19	aquatic ecosystems
17	geologic history
16	health and disease
16	human impacts
15	climate change
15	mineral resources
15	rocks and deposits
14	ocean characteristics
14	animals
13	water quality
13	volcanic eruption prediction
13	endangered species
12	aerial photography
12	maps and atlases
12	oil resources
12	ground water
11	global change
11	tsunamis
11	earth characteristics
11	snow and ice cover
11	energy resources
11	river systems
10	social sciences
10	ecosystems
10	hurricanes
10	grassland ecosystems
10	vegetation
9	ground-water flow

Science Topics term usage Monday, 2007-10-01