Science Topics term usage 2007-02-21

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.)

117	earthquakes
98	geographic information systems (GIS)
96	volcanoes
28	earth structure
28	earthquake occurrences
27	tectonic processes
26	electron microscopy
25	mineral resources
21	acid deposition
19	streamflow
18	ground water
17	energy resources
17	rocks and deposits
17	hyperspectral imaging
16	climate change
15	water use
15	animals
15	surface water (non-marine)
14	contamination and pollution
14	hurricanes
14	geologic structure
13	land use and land cover
13	river systems
13	water quality
13	water supply and demand
12	human impacts
12	global change
12	stream-gage measurement
12	economic geology
12	maps and atlases
11	floods
11	ground-water flow
11	sediment transport
11	tsunamis
10	geologic history
10	water properties
10	earthquake probabilities
10	hydrology
10	global warming
9	health and disease

Science Topics term usage Wednesday, 2007-02-21