Science Topics term usage 2007-04

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.)

3944	river systems
2844	geographic information systems (GIS)
2704	earthquakes
2168	volcanoes
930	earthquake occurrences
608	climate change
591	tectonic processes
579	acid deposition
563	earth structure
536	tsunamis
511	stream discharge
491	floods
479	ground water
471	streamflow
453	contamination and pollution
450	energy resources
440	mineral resources
439	animals
437	rocks and deposits
425	global warming
414	water quality
405	geologic history
396	maps and atlases
392	hydrology
390	human impacts
367	surface water (non-marine)
363	water resources
353	ground-water flow
341	land use and land cover
335	endangered species
327	hurricanes
323	map coordinate systems
304	oil resources
295	geologic structure
291	landslides
286	erosion
274	global change
270	sediment transport
263	cartography
259	precipitation (atmospheric)

Scripts used