What Is An Earthquake?
You know how when you have a really bad day and it seems like everything is going wrong? It's just one thing after another, and you get so frustrated that by the end of the day you are ready to explode from frustration. In fact, you may get so frustrated that you have a sudden outburst or release of all that built-up energy. And those unlucky enough to be around you when that happens should watch out!
Earth also builds up and releases energy in this way. When this occurs, we have an earthquake, which is the shaking of the ground when rock below Earth's surface breaks. Energy builds up underground and once it builds up enough it just can't hold back any longer, and we get the same explosive release of energy as a person might at the end of a long, bad day.
When the energy is released it radiates outward in all directions. As the energy travels toward Earth's surface from underground it shakes the ground, sometimes so much that it can cause damage above the ground. A seismograph is a machine that records ground movement from earthquakes. The information recorded tells us about the strength and speed of the energy traveling from the breaking point underground.
What Is An Earthquake?You know how when you have a really bad day and it seems like everything is going wrong? It's just one thing after another, and you get so frustrated that by the end of the day you are ready to explode from frustration. In fact, you may get so frustrated that you have a sudden outburst or release of all that built-up energy. And those unlucky enough to be around you when that happens should watch out!Earth also builds up and releases energy in this way. When this occurs, we have an earthquake, which is the shaking of the ground when rock below Earth's surface breaks. Energy builds up underground and once it builds up enough it just can't hold back any longer, and we get the same explosive release of energy as a person might at the end of a long, bad day.When the energy is released it radiates outward in all directions. As the energy travels toward Earth's surface from underground it shakes the ground, sometimes so much that it can cause damage above the ground. A seismograph is a machine that records ground movement from earthquakes. The information recorded tells us about the strength and speed of the energy traveling from the breaking point underground.
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