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.

3.
 The shape of the ball depend on the force direction
that form the fault:

4.
 EX: Identify the type of fault:

5.
 This how to make the beach ball: