Science Topics term usage 2007-11

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.)

1990	earthquakes
1885	geographic information systems (GIS)
1476	volcanoes
759	earthquake occurrences
660	volcanic activity
603	earth structure
582	acid deposition
575	earthquake probabilities
559	climate change
498	human impacts
471	real-time monitoring and reporting
451	contamination and pollution
449	tectonic processes
416	rocks and deposits
380	water quality
370	ground water
367	animals
366	mineral resources
366	energy resources
363	land use and land cover
359	global warming
347	geologic history
340	water supply and demand
322	desert ecosystems
316	tsunamis
314	erosion
314	health and disease
308	streamflow
307	aquatic ecosystems
298	ecosystems
297	sediment transport
297	endangered species
296	ocean characteristics
295	maps and atlases
291	hurricanes
285	oil resources
274	geologic structure
272	floods
266	droughts
265	hazards

Scripts used