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

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,...

[Free Registration/Login may be required to access all resource tools.] Discover how scientists learn about Earth's interior using seismic waves, meteorites, density, and the magnetic field. Additional resources are available for download.

Students will learn that scientists use seismic technology (sound waves) to map patterns of rock formations below the surface of the earth and that different types of rocks affect sound waves.

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...