The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

The USArray project has produced a remarkable animation showing how earthquake waves travel across massive expanses of landmasses. As you’ll see in this video, these waves are a lot like ripples on a ...

Field examples from the Western Desert of Egypt show the effectiveness of compressional-wave velocity (V p) and shear-wave velocity (V s) crossplots for identifying the type of fluid contained in a ...

When an earthquake strikes, it releases a massive amount of energy that travels through the Earth in the form of seismic waves. Read more about to understand how earthquakes occured and how we detect ...