Science Topics term usage 2007-05

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.)

2349	geographic information systems (GIS)
2329	volcanoes
2142	river systems
2087	earthquakes
736	earthquake occurrences
622	acid deposition
599	earth structure
528	ground water
502	tectonic processes
487	climate change
441	energy resources
434	streamflow
421	animals
420	contamination and pollution
409	human impacts
394	water quality
386	mineral resources
372	rocks and deposits
364	floods
362	tsunamis
346	geologic history
340	surface water (non-marine)
338	hydrology
337	stream discharge
327	maps and atlases
321	water resources
318	endangered species
311	landslides
310	sediment transport
307	oil resources
304	ground-water flow
303	real-time monitoring and reporting
296	global warming
293	hazards
280	hurricanes
275	volcanic activity
268	aerial photography
266	stream-gage measurement
262	geologic structure
261	ocean characteristics

Scripts used