earthquake waves mr. king. 1. explain the elastic rebound theory land ocean lava volcano

Earthquake Waves

Mr. King

1. Explain the Elastic Rebound Theory

LandOcean

LAVA

volcano


LandOcean

LAVA

volcanoSea Floor Spreading


LandOcean

LAVA


Subduction Zone

Lava fills in, cools and Continues to fill in the

Seafloor.


LandOcean

LAVA


Subduction Zone

Land gets pushed up whileThe ocean floor continues to

Be pushed down.


LandOcean

LAVA


Subduction Zone

Ocean plate melts causing some Of the lava to recirculate and some

To go up through a volcano


LandOcean

LAVA


Subduction Zone


LandOcean

LAVA



LandOcean

LAVA


Volcano explodes becauseLava moves through

cracks


LandOcean

LAVA


If land is lifted too high, itcan crack resulting in a

9.0 earthquake


LandOcean

LAVA


Subduction Zone

There are Many earthquakesIn a subduction

zone


LandOcean

LAVA


Subduction Zone

There are 1 dozen or so plates that make up the surface of theEarth. Each of these plates are floating on the mantle. They Are bumping and grinding on each other creating earthquakes.

2. Explain how a seismograph works.Earthquakes generate seismic waves which can be detected with a sensitive instrument called a seismograph. Advances in seismograph technology have increased our understanding of both earthquakes and the Earth itself.

Perhaps the earliest seismograph was invented in China A.D. 136 by a m an named Choko.

Can you tell how oneWorks?

3. Explain paths of Seismic Waves.

1. P waves - creates the big band sound, fastest wave first to travel and is a compression wave.

2. S waves - are transverse waves with an up and down motion.

3. L waves - most destructive waves are last to hit and result in a rolling motion.

4. How do you locate an epicenter?

You must have three different seismographs at three differentLocations - then you can pinpoint the different times each pickedUp the earthquake wave. You will do this in a lab.



Surface

focus

epicenter

A B



Surface

focus

epicenter

A BWhich seismicStation will Receive the Wave first? A or B

5. Explain the 3 different types of faults.

Land Plates


Land Plates

Indicates forces on the land


Land Plates

Indicates forces on the land

This is a Strike Slip Faultor a Transverse FaultSan Andréa Fault


Normal Fault


Normal FaultThe force is called tension

Also calledScarp face


Reverse Fault


Reverse FaultThe force pushing is called Compression

6. Explain Lithosphere and Athenosphere - Make the World


Lithosphere - solidLayer on the surfaceAlso called theCrust


Lithosphere - solidLayer on the surfaceAlso called the Crust.

Athenosphere - liquidAlso called the Mantle




Core - solidMade up ofSolid nickel andiron




Core - solidMade up ofSolid nickel andiron

Plate tectonics is a theory that explains the plates that make up theCrust are floating and grinding against each other.

• 7. How is a tsunami generated?

• Underwater earthquakes that jolt the water. As it travels it gains height by the beach.

• 8. Name some places in the US that have seen the most quakes - Why do you think these are high risk zones?

• California up to Washington are part of the ring of fire. This is where San Andreas Fault is and the Cascade Mountains

• 9. List many ways one can prepare for an earthquake

• Have tools handy to turn off gas

• Extra water and food

• Ready made shelters

• Extra medication

• Have arraigned a place to call

earthquake waves mr. king. 1. explain the elastic rebound theory land ocean lava volcano

Documents

ocean floor

earthquake slide

cracks slide

king slide

subduction zone lava

subduction zone land

different seismographs

different locations