Visualize the propagation of seismic waves from historic earthquakes through Earth's interior and around its surface.

Basic definitions and characteristics of the different wave types, diagrams, and speeds of the waves. Has links to information on seismology, earthquakes, and plate tectonics.

An inquiry unit that teaches students about the how and why earthquakes cause damage and about life in earthquake country. Students specifically learn about: earthquake damage, where earthquake occur, earthquake patterns, seismic waves,...

A suite of lessons focusing on all aspects of earthquakes. Inquiry-based exploration of earthquakes includes measuring seismic waves, predicting earthquakes, investigating magnitude and intensity, mapping fault lines, and evaluating...

Learn about earthquakes and how they are measured. Follow up with some activities that help to enhance your learning.

College instructor's notes on seismology includes earthquake origins, seismic waves, risks and damage assessments, and other information about the interior structure of the Earth.

See how seismic waves propagate outwards, as wave fronts, in all directions following an earthquake.

The paths of some seismic waves and the ground motion that resulted are shown in this poster.

College-level research information describes how the movement of Earth's interior causes seismic wave activity.

This website explains how the Richter and Mercalli Scales work.

A comprehensive site on plate tectonics and the Earth. Read how the oceanic and continental crusts, as well as the heat and the pressure within the Earth affect plate tectonics.

Earthquakes create seismic waves that travel through the Earth. By analyzing these seismic waves, seismologists can explore the Earth's deep interior. This fact sheet uses data from the 1994 magnitude 6.9 earthquake near Northridge,...

Scientists used maps and seismic data to produce a computer simulation that accurately shows the creation of the wave that shook the world. In this interactive, examine some of the models and images that reveal details of the tsunami...