Earthquakes Written and presented by Ava spelhaug

Earthquakes have been an always been a threat to humans. They destroy what we have created, they take lives. We heard of them, but do we really know what they are?

We know when an earthquake is occurring, but what starts it? Well first, it's important to know the basics. According to Lisa Wald, “An earthquake is what happens when two blocks of the earth suddenly slip past one another.” Those Two Blocks of the earth are known as tectonic plates, They are two sub-layers of the earth's crust (also known as the lithosphere: and part of the earth's crust, usually rigid like.) that move, float, and sometimes when they make contact it can lead to earthquakes. The shaking motion that occurs in an earthquake is because of a sudden release of energy. And rocks crank and slip past each other causing the ground to vibrate and shake. What starts earthquakes is when tectonic plates collide into each other and the impact makes rocks breaks and that leads to the vibration of the earth.

When an earthquake hits it may be alarming, but when it's over it's a relief. The question is, how do earthquakes stop? You see, when and an earthquake starts energy is released and that energy is what gives that area of land a vibrating effect. An earthquake stops when there is no more energy to be released the ground stops trembling. Which leads us to think that an earthquake is over/finished, but really it's still stopping.

What does an earthquake do? What is the most dangerous earthquake effect? Probably the most noticeable effect is the shaking of the ground. As mentioned before the ground shakes because of a collision with tectonic plates. The shaking is probably the most dangerous because according to Charles J. Ammon "other effects such as landslides, liquefaction, and tsunamis have also played an important part in destruction produced by earthquakes." If Just one effect from an earthquake can lead to so much destruction That shows how dangerous they really are.

With the threat of an earthquake looming in the air. People are always on the constant watch for these disastrous, unavoidable obstacles.

Credits:

Created with images by WikiImages - "earthquake natural disaster san francisco" • enzoabramo - "earthquake collapse rubble"

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