Examine the behavior of seismic waves. This graph illustrates direct and critically refracted waves.

A classroom simulation modeling how earthquake waves travel through Earth at different speeds. A graph is constructed to demonstrate the relationship between the distance and time of travel of seismic waves, and then used to locate the...

USGS provides the definition of a fault, the basics of earthquakes, the theory of plate tectonics, location of plates and earthquakes, and embedded links to related material.

Information from the Multidisciplinary Center for Earthquake Engineering Research guided toward enhancing the ability of communities to survive and rebuild after an earthquake. Includes current news and conferences, and information about...

FAQs about tsunamis address the reasons they occur and the destruction they cause. Also, learn about systems in place that provide Tsunami warnings as well as the data collected by scientists studying violent earthquakes and seismic sea...

jAmaSeis facilitates the study of seismological concepts in middle school through introductory undergraduate classrooms. Users can obtain and display seismic data in real-time from either a local instrument or from remote stations.