Actual video footage of the Loma Prieta earthquake in California in 1989 as it was happening. Shows people running for their lives as buildings and the ground shake around them. (Length: 1 min. 2 sec.)

Learn how foreshocks and aftershocks are related to the main shocks of earthquakes. [6:32]

This demonstration shows that seismic waves propagate in all directions in the Earth from the source (not just in the direction of a single slinky). [5:13]

See how to model differential friction along a fault. [2:30]

Narrated animation explaining the forces inside the Earth that can lead to earthquakes. (Length: 1 min. 39 sec.)