Incorporated Research Institutions for Seismology
Iris: Seismic Shadow Zones: S Wave Shadow Zone
What do S waves reveal about the Earth's surface? This video will illustrate the research. [2:11]
PBS
Pbs Learning Media: Earthquakes: The Seismograph
This video segment adapted from NOVA uses historical illustrations, photographs, and animations to explain how seismographs work, the difference between P and S waves, and the Richter scale.
Incorporated Research Institutions for Seismology
Iris: Seismic Shadow Zone: Basic Introduction
Understand the basics of how P and S waves create the seismic shadow zones. [1:48]
Incorporated Research Institutions for Seismology
Iris: Travel Time Curves Described
Learn how we can calculate the distance to an epicenter of an earthquake. [1:19]