Science Topics term usage 2007-04-17

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.)

240	river systems
112	volcanoes
95	geographic information systems (GIS)
93	earthquakes
39	stream discharge
31	floods
26	streamflow
26	acid deposition
26	earthquake occurrences
24	hydrology
23	water resources
23	earth structure
22	tectonic processes
20	tsunamis
18	geologic history
18	energy resources
17	mineral resources
17	sediment transport
16	climate change
16	surface water (non-marine)
16	stream-gage measurement
16	human impacts
15	rocks and deposits
15	contamination and pollution
15	global warming
14	landslides
14	river reaches
14	plants (organisms)
14	maps and atlases
13	oil resources
13	ecosystems
13	invasive species
13	ground water
12	precipitation (atmospheric)
12	endangered species
12	biogeography
12	magnetic field (earth)
12	hurricanes
11	map coordinate systems
11	topography

Science Topics term usage Tuesday, 2007-04-17