Science Topics term usage 2007-12-20

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.)

59	ocean circulation
56	geographic information systems (GIS)
50	earthquakes
25	volcanoes
23	earthquake occurrences
17	acid deposition
17	viruses
14	contamination and pollution
12	global change
12	real-time monitoring and reporting
11	earth structure
11	floods
10	human impacts
10	snow and ice cover
10	water quality
10	erosion
10	ocean currents
10	climate change
9	geophysics
9	rocks and deposits
9	energy resources
9	river systems
8	ground-water flow
8	sediment transport
8	health and disease
8	USGS data downloading
8	grassland ecosystems
8	surface water (non-marine)
8	water chemistry
7	geologic structure
7	global warming
7	volcanic eruption prediction
7	maps and atlases
7	ocean characteristics
7	ground water
7	planetary bodies
7	droughts
7	water supply and demand
7	forest ecosystems
6	hurricanes

Science Topics term usage Thursday, 2007-12-20