Faults
There are 3 types of faults a reverse fault, strike slip fault, and a normal fault. Faults are located where the tectonic plates meet.
Reverse Fault
A reverse fault occurs at an convergent boundary. The 2 plates squeeze together forcing one on top and the other underneath.
Strike Slip Fault
A strike slip fault is also known as a transform fault. This fault is much like a transform boundary. The plates slip past each other then create forces that build up. Then the plates break apart and an earthquake occurs.
Normal Fault
A normal fault occurs at a divergent boundary. The plates move apart creating a normal fault. In a normal fault, the rock that is above the fault slides down.
Seismic Waves
Seismic Waves are the waves of energy caused by a sudden breaking of rock in the earth. There are 3 types of seismic waves.
Primary Waves (P Waves)
P waves are the fastest of the three seismic waves. They pass through solids, liquids and gases. P waves cause a small vibration in the earth's crust. P waves warn you that an earthquake is happening and gives people a few seconds to prepare for the other waves.
Secondary Waves (S Waves)
The S waves are slower then P waves, but faster then the surface waves. S waves can only pass through solids and are the second waves felt during an earthquake.
Surface Waves
Surface waves are the slowest waves. The rolling motion of the surface wave destroys roads and buildings. They cause most damage in an earthquake.
The video is explaining the seismic waves.