topic: earthquakes. sub-project 1: earthquake risk international experience, including tragic...
TRANSCRIPT
Topic: EarthquakesTopic: Earthquakes
EarthquakeEarthquake --
FaultFault--
3 Major Types of Faults
NormalNormal ReverseReverse
One Famous Fault in the One Famous Fault in the USAUSA The San Andreas Fault in The San Andreas Fault in
CaliforniaCalifornia
FocusFocus --
EpicenterEpicenter --
Seismic Waves Seismic Waves (earthquake waves)(earthquake waves)
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•Three TypesThree Types
•--
1) P-waves (Primary 1) P-waves (Primary waves)waves) -- -- --
2) S-waves (Secondary 2) S-waves (Secondary waves)waves) -- -- ** - **** - **
3) L-waves (Long or 3) L-waves (Long or Surface Waves)Surface Waves) -- -- --
SeismographSeismograph --
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Waves refract (bend) in different densities
Shadow ZoneShadow Zone Shadow ZoneShadow Zone
Earthquake MagnitudeEarthquake Magnitude
Richter Scale Richter Scale (Magnitude)(Magnitude)
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Mercalli ScaleMercalli Scale – –
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Time to Review
What type of wave?What type of wave?
What type of wave?What type of wave?
What is this point called?What is this point called?
Earth’s surfaceEarth’s surface
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What is this point called?What is this point called?
Earth’s surfaceEarth’s surface
FocusFocus
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Final QuestionFinal Question
Which seismic wave type Which seismic wave type travels the slowest?travels the slowest?