Earthquake Notes 2013

Fault

 

Earthquake

Surface where rocks break

 

Shaking caused when rocks break at a fault

 

3 types of faults

Normal fault-happens at divergent boundary

Reverse fault-happens at convergent boundary

Strike-slip fault-happens at transform boundary

San Andreas Fault

Famous strike-slip fault in California-many earthquakes.

Seismic waves

 

Focus

Energy generated by an earthquake

 

exact point where earthquake energy is released

3 types seismic waves

Primary waves-fastest, can move thru liquids

Secondary waves-slowest, canŐt move thru liquids

Surface waves-cause the most damage

Epicenter

 

 

Seismograph

 

Seismologist

Where an earthquakes energy reaches the surface and spreads

 

Instrument that measures seismic waves

 

Scientists who studies earthquakes

Magnitude

 

Richter scale

Measure of the energy released by an earthquake

 

Used to measure earthquake strength; each number is 10 times stronger.  A mag 3 is 10 times stronger than a  2.

Tsunami

Ocean wave caused by earthquake