A fault plane solution is simply a method for using seismograms from an earthquake to study the faulting process.

1. Fault plane solution
Focal mechanism
First motion
Beach ball
by:
Mohamed Ayed
Demonstrator at faculty of science Ain Shams University

2. A fault plane solution is simply a method for using seismograms
from an earthquake to study the faulting process.

5.  The shape of the ball depend on the force direction
that form the fault:

8.  EX: Identify the type of fault:

9.  This how to make the beach ball: