1. WHAT IMPACT DO EARTHQUAKES HAVE ON OUR LIVES?

2. WHAT IS A WAVE? Wave: Transference of energy
P Wave (longitudinal): A primary wave vibrates parallel to direction of movement
S Wave (transverse): A secondary wave vibrates perpendicular to the direction it advances
L Wave: When S and P waves reach surface and cause horizontal movement of earth

3. WHAT CAUSES EARTHQUAKES?
Movement of plates cause stress and tension to build up
Focus: Location inside earth where earthquake originates also called hypocenter
Epicenter: Point on earth’s surface directly above focus
Shadow zone: Area on earth where there are no waves, caused by the inner core

4. HOW DO WE DETERMINE THE LOCATION OF THE EPICENTER?
Seismograph: Instrument that measures earthquakes
Need three seismograph readings to determine the location

5. HOW DO WE MEASURE EARTHQUAKES?
Richter Scale: Measures magnitude or power of earthquake

6. Mercalli Scale: Measures Intensity

7. What are the major types of faults?
Normal Fault: divergent boundary, caused by tension
Thrust (reverse) Fault: convergent boundary, caused by compression
Strike-Slip Fault: Transform boundary, caused by shear

8. What factors play a role in the amount of damage caused by an earthquake?
Magnitude
Location of the epicenter
Man made structures

9. What are some safety tips for home/school?
Secure large standing cabinets
Place safety locks on kitchen cabinets
Secure gas pipes
Have a main shut off for gas/electric
Do not place loose items high on shelves