Let's explore one of the most intensively studied geologic structures on Earth - The San Andreas Fault.

Follow the link above to an online publication that provides all you need to know about this active fault that bisects California, USA.

Once you have read and mastered the material on the website, use that information to answer the questions below:

1. Where is the San Andreas Fault located? What major population centers are located near the fault? How many people live at risk along the fault?

2. When did the San Andreas Fault become active? Is it still active today? What geological processes are at work to create the fault?

3. What type of fault is the San Andreas Fault?

4. What is the frequency of very large earthquakes along the San Andreas Fault? When were the last major earthquakes associated with this fault?