Science Topics term usage 2007-12

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.)

1465	earthquakes
1391	geographic information systems (GIS)
910	earthquake occurrences
765	volcanoes
424	acid deposition
401	earth structure
375	climate change
313	global warming
296	contamination and pollution
284	rocks and deposits
280	floods
279	tectonic processes
265	human impacts
256	erosion
251	tsunamis
241	real-time monitoring and reporting
240	geologic history
235	energy resources
233	landslides
232	ground-water flow
224	water quality
221	health and disease
219	animals
216	ground water
214	endangered species
208	geologic structure
207	mineral resources
200	land use and land cover
195	map coordinate systems
194	snow and ice cover
192	aerial photography
191	water supply and demand
189	ground-water quality
185	global change
184	desert ecosystems
184	maps and atlases
182	sediment transport
174	magnetic field (earth)
174	streamflow
173	precipitation (atmospheric)

Scripts used