Science Topics term usage 2007-05-18

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.)

69	volcanoes
69	geographic information systems (GIS)
56	earthquakes
36	coalbed methane resources
26	acid deposition
25	landslides
19	climate change
19	human impacts
18	sediment transport
16	mineral resources
16	floods
15	contamination and pollution
14	ground-water flow
13	earthquake occurrences
13	tectonic processes
12	real-time monitoring and reporting
12	energy resources
12	tsunamis
11	water resources
11	ground water
11	rocks and deposits
10	stream-gage measurement
10	hurricanes
10	erosion
9	earth structure
9	sea-floor characteristics
9	maps and atlases
9	water quality
9	grassland ecosystems
8	animals
8	water supply and demand
8	mining hazards
8	wetland ecosystems
8	volcanic features
8	population and community ecology
8	magnetic field (earth)
8	marine geology
8	surface water (non-marine)
8	land use and land cover
8	hazards

Science Topics term usage Friday, 2007-05-18