Essay on Earthquakes And Its Effects On The Earth

1589 Words Apr 8th, 2016 7 Pages
Usually all earthquakes happen the same, but the way an earthquake actually occurs is such a spectacular process that everyone should get to know. They are created by many active fault zones within the Earth (Fronabarger). Most earthquakes are made along faults, tectonic plate boundary zones, or even along mid-oceanic ridges (Pidwirny). Small earthquakes can be caused by volcanic activity, landslides, mine blasts, and nuclear experiments (Science Daily). Sun and moon cause tremors by creating tides in Earth 's crust (Live Science Staff). When plates squeeze or stretch, huge rocks shift making faults and causing earthquakes ("Earthquakes"). Faults are where rocks slide past each other and cause a crack ("Earthquakes"). Faults have been the result of tectonic plates colliding over millions of years (Thompson 13). The major faults that cause earthquakes are normal dip-slip, reverse, oblique dip-slip, and strike-slip ("Earthquakes"). In a normal dip-slip fault, the rocks shift straight up or down, following the line of dip ("Earthquakes"). In a reverse fault, pressure causes one block of rock to overhang the other one ("Earthquakes"). As the rock shifts, the block is pushed further up and over the other block ("Earthquakes"). During a strike-slip, the rocks scrape sideways past each other ("Earthquakes"). In an oblique-slip, the rocks slide past each other and also up and down in a diagonal movement ("Earthquakes"). When plates are in so much strain, they then begin to crack.…

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