The Gravity Recovery and Climate Experiment (GRACE) mission uses twin satellites to make detailed measurements of Earth's gravity field. GRACE materials include a description of the mission, research projects, and personnel. There are also links to news articles, publications, datasets, and software tools for processing gravity data. Full description.

This set of online simulations shows the forces that may be at work on geologic structures or on man-made structures during an earthquake. Users can see examples of compression, tension, bending, and torsion. Each simulation also features a link to a photo of a real-life example. Full description.

This interactive feature shows students how an earthquake epicenter is located and how Richter magnitude is determined. They will use recordings of seismograms from three stations (provided in the activity), learn the difference between the focus and epicenter of an earthquake, and that the magnitude of an earthquake is an estimate of the amount of energy that it has released. Full description.

This portal provides links to online resources for land surveying and geomatics. Full description.

This site presents educational modules for teaching about earthquakes, volcano eruptions and related plate tectonic concepts using an interactive computer program for mapping called Seismic/Eruption (also called SeisVolE). The program includes up-to-date earthquake and volcanic eruption catalogs and allows the user to display earthquake and volcanic eruption activity in "speeded up real time" on global, ... Full description.

This is the home page of the Southern California Earthquake Center (SCEC), a consortium of universities and research institutions dedicated to gathering information about earthquakes in Southern California, integrate that knowledge into a comprehensive and predictive understanding of earthquake phenomena, and communicate this understanding to end-users and the general public in order to increase earthquake ... Full description.

This is a lesson designed for 7-12th (adaptable for 4-6) grade students. It focuses on earthquakes in the Utah region, but can be adapted to use anywhere. Forty-eight Intermountain West earthquakes that have occurred since 1876 have been researched by Earthquake Education Services (EES). Newspaper articles, individual accounts (diary entries, interviews, letters, etc.), and photographs have been collected. ... Full description.

This page contains a map of southern California with epicenters of earthquakes shown as circles of different sizes and colors. The size and color of each earthquake symbol corresponds to its magnitude, as indicated by a scale on the map. Clicking on an epicenter takes the user to a page of information about that earthquake. Earthquakes dating back to 1812 are shown. Also available on this page are ... Full description.

The Southern California Integrated GPS Network (SCIGN), which operates a network of 250 continuously-operating Global Positioning System (GPS) stations, provides access to a variety of high-level GPS data products, including position time series, crustal motion models, and strain rate maps. Registration and log-in are required. Full description.

In this lesson, younger students will be introduced to the various orbital paths that are used for satellites. Using a globe and a satellite model or a large picture of Earth, the teacher will introduce three types of orbital paths (polar, elliptical, and geosynchronous). The students should be able to define 'satellite', define the three types of orbits, describe how satellites orbit the Earth, and ... Full description.