How Measuring Changes in the Land Along Faults can Help Predict Earthquakes

          Measuring changes in faults may be able to help where earthquakes will hit next.  Scientists can use tools such as tilt meters, creep meters, laser-ranging devices, and GPS satellites to monitor whether faults move up and down or side to side. 
          There are many different ways that we can use faults to our advantage.  Sometimes, faults create complex patterns, which, when noticed, can help geologists tell when an earthquake might happen.  Other times, in a fault zone, if one fault is triggered by a lot of stress to create an earthquake, the energy released by that quake will increase the stress on a fault nearbye.  Then, that fault will create an earthquake, which will then trigger another one in a nearer fault, and then another, and then another.  It's like dominoes - when you tip one over, they all fall down.  If we can find out where the first earthquake might begin, we can predict all the other faults that will slip/break under the extra stress.  Also, if we monitor the movements of the land around faults, we may be able to figure out when stress is building up inside them, and that way, we could figure out when the next earthquake is going to be. 

I found this really great websites about faults and seismic waves and everything, with moving diagrams:  Awesome Earthquakes