Weekly Blog 9/28 - 10/5

Summary: This week we learned about earthquakes. Earthquakes: Earthquakes are a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action. What earthquakes can do are....
  • Cause fires
  • Destroy buildings
  • Kill people
  • Cause tsunamis
 And much, much more. There are three different types of faults. In the picture (above), you will see that these three types are a reverse fault, a normal fault, and a strike-slip fault.

 A reverse fault is.... A fault in which the hanging wall has moved upward relative to the footwall. Reverse faults occur where two blocks of rock are forced together by compression. Compare a normal fault. In other words, a reverse fault is when two pieces of rock grind against each other.

 A normal fault is.... A fault in which the hanging wall has moved downward relative to the footwall. Normal faults occur where two blocks of rocks are pulled apart, as by tension.

A strike-slip fault is.... A Strike-slip fault is vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally. One of the blocks of rocks will move one way, and the other will move the other way.

SP4: We plotted some earthquakes on a world plotting map. We found that the earthquake coordinates that we were given were odd because these earthquakes happened to be in the ring of fire. Since they are in the ring of fire, earthquakes may be caused by volcanic activity. We learned that the ring of fire is a tectonic plate, and other plates rubbing against it causes earthquakes. 

 Citation: Fault Line(s)

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