CK-12 Foundation
Ck 12: Earth Science: Measuring Earthquake Magnitude Study Guide
An overview of measuring earthquake magnitude.
University of California
U. Of California Berkeley: Can You Read a Quake?
Eight seismograms and instructions are provided to assist in the learning of how to locate the epicenter of an earthquake.
Michigan Technological University
How Are Earthquake Magnitudes Measured?
This website explains how the Richter and Mercalli Scales work.
Michigan Technological University
How Do I Read a Seismogram?
When you look at a seismogram, there will be wiggly lines all across it. So which wiggles are the earthquake? This site answers this question.
Science Struck
Science Struck: Richter Scale Explained
Explains what the Richter scale is and how the Richter formula is used to measure the magnitude of earthquakes. Includes a table of Richter values showing the changes in characteristics, impact, and frequency of tremors and earthquakes...