Science Topics term usage 2007-05-10

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.)

177	river systems
99	geographic information systems (GIS)
86	volcanoes
84	earthquakes
30	streamflow
29	tectonic processes
25	earthquake occurrences
24	acid deposition
22	energy resources
22	stream discharge
20	hazards
19	water resources
19	earth structure
19	contamination and pollution
18	rocks and deposits
18	human impacts
18	hydrology
18	water quality
18	aerial photography
17	climate change
16	volcanic activity
16	tsunamis
15	floods
15	sediment transport
15	geologic history
14	stream-gage measurement
14	oil resources
14	hurricanes
14	landslides
13	surface water (non-marine)
13	ocean characteristics
13	water properties
13	impact cratering
13	fires
13	geologic structure
12	land use and land cover
12	aquatic ecosystems
12	animals
12	health and disease
12	cartography

Science Topics term usage Thursday, 2007-05-10