Earthquake Topics — Magnitudes
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- A Comparison of Two Bay Area Earthquakes: 1989 v. 1906 — Investigate the shaking intensity and magnitude of these two earthquakes. (USGS)
- About Earthquakes — descriptions and graphics of earthquakes and their effects (Univ. of Nevada, Reno)
- Bigger Faults Make Bigger EQ's — three different rope lengths are used to demonstrate how a fault ruptures in an EQ and why bigger faults make bigger EQ's (USGS)
- Digital Online Geology - Earthquakes — Online version of "Earthquakes" by Edward J. Tarbuck, Frederick K. Lutgens, and Dennis Tasa. This informative chapter about earthquakes has images, text, quizzes, and narrated animations explaining what happens when earthquakes occur. (TASA Graphic Arts)
- Earth Science Education Activities — a wealth of excellent hands-on activities for teaching about earthquakes, volcanoes, seismic waves, plate tectonics, earth structure, seismic waves, convection, seismometers and more! (Purdue Univ.)
- Earthquake Density Maps for the World — Maps of average number of earthquake per year, magnitude 5.0 and greater, for the World. Maps are grouped by depth intervals. (USGS)
- Earthquakes — slide-show type presentation (Tech Museum of Innovation)
- Earthquakes by Bruce A. Bolt Online Companion — links related to subjects covered in book (W.H. Freeman & Co.)
- Earthquakes, MegaQuakes, and the Movies — discussion about facts versus fantasies (USGS)
- Earthquakes: The Rolling Earth — slide-show type presentation (Oregon State University)
- Echando Raices en Tierra de Terremotos — Este manual provee información sobre por qué nos deben preocupar los terremotos en el Sur de California, qué debemos hacer para estar seguros y reducir el daño, y también qué debemos saber de lo básico sobre terremotos. (USGS & many other organizations)
- Global Earthquake Explorer, The — easy tool for non-seismologists to retrieve, display and analyze seismic data (Univ. of South Carolina, IRIS)
- How Earthquakes Work — description of the basics (How Stuff Works)
- Isoseismal Maps (PDF) — learn the difference between intensity and magnitude and gain experience with contouring on maps (USGS)
- Living in Earthquake Country-Teaching Box — Explores how and why earthquakes cause damage, seismic waves, the ability of scientists to predict the likelihood and severity of earthquakes at specific locations, the difference between magnitude and intensity, the occurrence of earthquakes along patches of planar faults, and the potential damage caused by earthquakes such as landslides, liquefaction, or structural failure. (DLESE)
- Living in Earthquake Country: A Teaching Box — 7 lessons with the goal of teaching students about how and why earthquakes cause damage. Explores seismic waves, the ability of scientists to predict the likelihood and severity of earthquakes at specific locations, the difference between magnitude and intensity, the occurrence of earthquakes along patches of planar faults, and the potential damage caused by earthquakes such as landslides, liquefaction, or structural failure. (DLESE)
- Magnitude / Intensity Comparison — Explains the difference between magnitude and intensity. (USGS)
- Magnitude 7 and Greater Earthquakes This Year — List and map of magnitude 7 and greater earthquakes this year. List and map of deaths from earthquakes this year. (USGS)
- Magnitude 8 and Greater Earthquakes Since 1990 — List of magnitude 8 and greater earthquakes since 1990. (USGS)
- Magnitude versus Intensity Lesson (PDF) — classroom lesson to teach the difference between earthquake magnitude and earthquake intensities (USGS)
- Measuring the Size of an Earthquake — How the size of an earthquake is measured. (USGS)
- MegaQuakes/Earthquake Simulator — dial up an earthquake and see the results (Incorporated Research Institutes for Seismology (IRIS))
- Number of Magnitude 7.0 and Greater Earthquakes per Year, Since 1900 — List of the number of magnitude 7.0 and greater earthquakes per year, since 1900. (USGS)
- Putting Down Roots in Earthquake Country - NCA edition — Earthquakes and preparedeness in northern California (USGS & many other organizations)
- Putting Down Roots in Earthquake Country - SCA edition — Earthquakes and preparedeness in southern California (USGS & Southern California Earthquake Center (SCEC))
- Putting Down Roots in Earthquake Country - Utah edition — Earthquakes and prepardeness in Utah (Utah Seismic Safety Commission)
- Richter Magnitude Scale, The — Description of the Richter magnitude scale. (USGS)
- Science Explained, The — links to popular science articles about earthquake research (USGS)
- Severity of an Earthquake, The — measuring earthquakes, online USGS general interest publication (USGS)
- The Richter Scale — An interactive demonstration of calculating the magnitude of an earthquake based on amplitude and S and P wave locations (Scripps Institution of Oceanography)
- Try It Yourself Calculator — How much bigger is a magnitude 8.7 earthquake than a magnitude 5.8 earthquake? (USGS)
- Virtual Earthquake & Other Labs — you're the scientist, and you have to locate the earthquake and determine the magnitude (Calstate LA)
