Broad term for all science related to the study of the earth.
Monitoring the Earth's dynamic magnetic field [ More info] Describes the reasons why USGS monitors Earth's magnetic field and the history of that monitoring effort.
National Earthquake Information Center [ More info] Information on world earthquake activity with links to facts and lists on large earthquakes, earthquake e-mail notification, hazards and preparedness, educational links, news and highlights and other seismic information.
Natural Hazards - Earthquakes [ More info] News and related information focusing on the importance of earthquake hazards in the United States.
PAGER--Rapid assessment of an earthquake's impact [ More info] An automated system for rapidly estimating the shaking distribution, number of people and settlements exposed to severe shaking, and range of possible fatalities and economic losses. A color-coded alert suggests levels of appropriate response.
Precambrian Time - The Story of the Early Earth [ More info] Explains what we know about the early history of the earth and how we study the deposits formed during that time to understand the formation of the earth and life.
Progress toward a safer future since the 1989 Loma Prieta earthquake [ More info] Summarizes what we have learned since this serious earthquake and how we have improved our preparedness for events such as this.
Radon in earth, air, and water [ More info] Links to USGS publications, bibliographies, and maps on radon in the U.S., plus links to non-USGS sites with information on radon.
Rare earth elements--End use and recyclability [ More info] Rare earth element use is changing with technology. This report explains how we use them and the prospects for recycling these important commodities.
Recent earthquakes in Hawaii [ More info] Interactive maps of earthquakes of last 2 hours, last 2 days, and last 2 weeks in Hawaii.
Severity of an earthquake [ More info] Description of intensity and magnitude as indicators of the size of an earthquake and the levels of severity measured on the Richter Magnitude Scale and the Modified Mercalli Intensity Scale.
Alphabetical Index of Topics
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