Branch of geology studying the physical characteristics and phenomena of the earth and its atmosphere.
Earthquakes: Frequently Asked Questions [ More info] Answers to a wide variety of questions (FAQs) about earthquakes, such as dictionary of terms, earthquake activity and probabilities, common myths, faults, plate tectonics, and earthquake measurement techniques.
Executive summary, workshop: seismic and tsunami hazard in Puerto Rico and the Virgin Islands [ More info] Summary of workshop with links to reports that are recommendations for future projects.
Field reconnaissance report of landslides triggered by the January 12, 2010, Haiti earthquake [ More info] Preliminary aerial helicopter reconnaissance of areas affected by landslides and ground inspections at some accessible landslide sites.
Forecasting California's earthquakes - What can we expect in the next 30 years? [ More info] Shows how we know severe earthquakes will occur and where.
General Earthquake Observation System (GEOS) [ More info] Earthquake and aftershock data collected by the USGS General Earthquake Observation System project in Menlo Park, California.
Geologic hazards team [ More info] An organizational unit within USGS that studies earthquakes, landslides, and geomagnetism. Contact information and descriptions of current research projects.
Geology research and information [ More info] Alternative web access to geological, geochemical, and geophysical research programs that are divided among the new USGS mission areas.
Geomagnetic charts [ More info] Links to charts of the Earth's magnetic field in different projections showing declination, inclination, and total, horizontal and vertical intensities plus references and note on limitations.
Geomagnetic FAQs [ More info] Frequently-asked questions, with answers, about the Earth's magnetic field.
Geomagnetic models [ More info] Description of magnetic models with link to on-line calculation, freeware calculator (DOS and Windows), descriptions of model types, and references.
Alphabetical Index of Topics
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