What's in a Name?
This is the point inside the Earth where the fault first slips in an earthquake.
The focus
This wave has an up & down motion
The S-Wave
This is the place on the surface directly above where an earthquake happens.
It is called the epicenter. (location on a map)
This wave has the greatest intensity
The S-Wave
This wave arrives 1st
Primary (P-Wave)
This wave has push/pull motion
The P-Wave
This wave arrives second
The Secondary (S-Wave)
This is a fracture in the Earth where movement has occurred in the past.
A Fault
Describe Trianglation
It takes three data points to allow scientists to determine where the earthquake happened.
This is term describes the amount of ground shaking.
Intensity