Science Topics term usage 2006-12

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.)

2681	geographic information systems (GIS)
2453	earthquakes
1764	volcanoes
836	earthquake occurrences
508	tectonic processes
420	earth structure
395	acid deposition
380	contamination and pollution
372	human impacts
370	animals
365	tsunamis
358	mineral resources
350	climate change
340	ground water
322	rocks and deposits
321	energy resources
318	floods
306	water quality
294	maps and atlases
282	erosion
281	oil resources
270	ground-water flow
266	map coordinate systems
266	river systems
259	real-time monitoring and reporting
248	endangered species
243	landslides
241	geologic history
237	magnetic field (earth)
235	global warming
228	aerial photography
226	topography
224	streamflow
224	geologic structure
218	land use and land cover
218	desert ecosystems
217	volcanic eruption prediction
210	volcanic activity
206	hurricanes
202	remote sensing

Scripts used