21.6. Active, Inactive, and Reactivated Faults

Try these first

1. 1.

   What are active faults?

   Hint

   Think about their recent movement.

2. 2.

   How can inactive faults still be dangerous?

   Hint

   Consider the possibility of reactivation.

3. 3.

   What defines an active fault?

   • A fault that hasn't moved in thousands of years.
   • A fault that has moved recently.
   • A fault that is always dormant.

   Hint

   Think about the timing of the last movement.

4. 4.

   True or False: Inactive faults are completely safe.

   • True
   • False

   Hint

   Consider their potential for future movement.

5. 5.

   Design a planning strategy for a new community near an active fault line, including safety measures.

   Hint

   Think about engineering practices and community safety.

6. 6.

   Evaluate historical seismic activity to determine risks associated with a dormant fault in a densely populated area.

   Hint

   Use geological history to inform risk assessment.