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Earthquakes Happening

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Title: Earthquakes Happening


1
Earthquakes Happening
  • Created by Emily Bruch and Tia Green

2
Alfred Wegeners Theory
  • Alfred Wegener had a thought that there is a
    super continent. They called this super
    continent Pangea. Pangea is all the continents
    in one big puzzle piece.

3
Tectonic Plates
  • The major plate that effects America is the Gorda
    Plate, North America Plate, Jaun De Fuca Plate,
    Pacific Plate and if you include Puerto Rico then
    the Carrabian Plate to.

4
California Earthquakes
  • California lies on the junction of the Pacific
    Plate and North America Plate. As these two
    plates slip past each other the movement triggers
    earthquakes. Florida is situated virtually in the
    middle of the North America plate and is
    therefore seismically inactive.

5
Destructive Earthquakes
  • On January 23, 1556 in Shaanxi, China a
    earthquake with the magnitude of 8 killed more
    than 830,000 people.

6
Basic Tectonic Plate Boundaries
  • One of the types of plates is a divergent. That
    is when two tectonic plates move apart from each
    other. One more would be Divergent boundary. This
    occurs when two plates come together. Last one is
    Transform boundary. This is when two plates
    sliding past each other.

7
What are Tsunamis
  • Tsunamis are waves caused by the displacement of
    water from an earthquake. They usually move about
    600 mph.

8
Energy Waves
  • To types of waves are primary and secondary
    waves. Primary waves go through all types of
    matter and secondary waves travel through solids.

9
Releasing Energy
  • The richer scale is a logarithmic so 7.2
    earthquakes are 10 times more powerful than 6.2
    earthquakes.

10
Testing Location of Earthquakes
  • Seismology use mapping the density of rock
    besides measuring the magnitude and location of
    earthquakes.

11
Last weeks Earthquakes
  • Where did most of the earthquakes happen last
    week. They happened in San Francisco CA, San Jose
    CA, Mecicari CA, Las Vegas NV, Oregon, and the
    Pacific Ocean

12
Predictions
  • Scientist can predict earthquakes but they
    usually have little hope.

13
Where Earthquakes Occurred
  • They use the data collected from as many
    seismograph stations as possible ( you need at
    least three) and perform a calculation called
    triangulation.
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