Science Topics term usage 2006-04-13

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.)

213	earthquakes
132	volcanoes
90	geographic information systems (GIS)
53	earthquake occurrences
42	energy resources
32	geologic processes
31	water quality
28	streamflow
28	tsunamis
27	surface water (non-marine)
26	tectonic processes
26	ground water
23	climate change
23	floods
22	storms
21	oil resources
20	sediment transport
19	tornadoes
19	contamination and pollution
19	magnetic field (earth)
18	rocks and deposits
18	earth structure
17	landslides
17	animals
17	ground-water flow
16	hurricanes
16	mineral resources
15	sedimentation
15	earthquake probabilities
14	maps and atlases
14	seismology
14	cartography
14	aerial photography
13	land use and land cover
13	hazards
13	coastal zones
13	acid deposition
12	water properties
12	river systems
11	ocean characteristics

Science Topics term usage Thursday, 2006-04-13