Science Topics term usage 2006-04-18

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.)

238	earthquakes
151	volcanoes
88	geographic information systems (GIS)
55	earthquake occurrences
54	energy resources
35	streamflow
34	contamination and pollution
33	hydrology
32	mineral resources
31	tectonic processes
30	surface water (non-marine)
30	ground water
29	ecosystems
27	tsunamis
25	coastal zones
24	earthquake probabilities
24	geologic history
23	geologic structure
22	aerial photography
21	landslides
21	invasive species
19	water quality
19	magnetic field (earth)
19	sedimentation
19	oil resources
18	human impacts
18	earth structure
17	hazards
17	animals
16	real-time monitoring and reporting
16	coal resources
16	vertebrates
16	water resources
16	volcanic activity
15	rocks and deposits
15	climate change
14	acid deposition
14	land surface characteristics
14	natural gas resources
14	floods

Science Topics term usage Tuesday, 2006-04-18