US Geological Survey
U.s. Geological Survey: How Much Bigger..? Calculator
A calculator to show the difference in magnitude between earthquakes. Understand that the Richter scale used to measure earthquakes is base-10 logarithmic scale.
Weather Wiz Kids
Weather Wiz Kids: Earthquakes
Fun FAQs on earthquakes, their causes earthquakes, the Richter scale, and earthquake safety tips. Site includes videos, animations, and links to related material. Excellent for student exploration. (Click on "Earthquakes" on left hand...
Other
Ceri: Earthquake Facts and Follies
A list of frequently asked questions about earthquakes. This is a good source for earthquake trivia and separating fact from fiction.
US Geological Survey
U.s. Geological Survey: How Much Bigger?
This resource provides information about the magnitude scale, and allows users to try to figure out the difference between earthquake sizes.
Michigan Technological University
How Are Earthquake Magnitudes Measured?
This website explains how the Richter and Mercalli Scales work.
The Field Museum
Field Museum: Exhibits: Nature Unleashed: Inside Natural Disasters
Discover the true powers of Mother Nature through this vivid collection of research which delves into the causes of natural disasters and the impacts on those affected.
Teachers.net
Teachers.net Lesson: Natural Disaster Bloom's Taxonomy
Here is a lengthy activity for student to work on while learning about floods, hurricanes, tornadoes, and earthquakes. Students will enjoy researching these disasters and applying what they have learned to a project.