Science Topics term usage 2006-11

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.)

2993	earthquakes
2506	volcanoes
1417	geographic information systems (GIS)
876	earthquake occurrences
742	earth structure
713	tectonic processes
649	acid deposition
561	floods
548	contamination and pollution
530	tsunamis
485	energy resources
466	ground water
454	human impacts
449	water quality
428	mineral resources
421	climate change
384	geologic history
383	hurricanes
379	streamflow
378	erosion
374	oil resources
373	rocks and deposits
370	desert ecosystems
359	animals
343	maps and atlases
341	landslides
335	geologic structure
315	endangered species
314	ground-water flow
314	land use and land cover
298	sea-floor characteristics
280	aerial photography
279	surface water (non-marine)
277	volcanic activity
271	health and disease
269	magnetic field (earth)
265	water supply and demand
259	invasive species
257	hazards
239	ecosystems

Scripts used