Science Topics term usage 2007-12-14

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.)

47	earthquakes
44	geographic information systems (GIS)
27	volcanoes
26	estuarine ecosystems
18	water supply and demand
15	earthquake occurrences
14	unconsolidated deposits
13	acid deposition
12	erosion
12	climate change
10	aerial photography
9	global change
9	global warming
9	ground-water flow
9	earth structure
9	water quality
9	geologic history
9	river systems
9	plants (organisms)
9	sediment transport
8	rocks and deposits
8	aquatic ecosystems
8	energy resources
7	animals
7	floods
7	map coordinate systems
7	ecosystems
6	tiltmeter measurement
6	land use and land cover
6	saltwater intrusion
6	desert ecosystems
6	ecosystem monitoring
6	real-time monitoring and reporting
6	marine geology
6	human impacts
6	tectonic processes
6	biostratigraphy
6	gravitational field (earth)
6	ecology
6	precipitation (atmospheric)

Science Topics term usage Friday, 2007-12-14