The strength, or magnitude, of an earthquake can be measured using the Richter scale. A seismometer detects Earth's shaking and draws the shaking on a seismograph. The effect of an earthquake can be measured by a seismometer. And magnitude 5 (or more) damages over a wide area. On this scale, 2 is shaking that can not be noticed easily. The Richter Scale was invented by Charles Francis Richter in 1935. The strength, or magnitude, of an earthquake, can be measured using the Richter scale. A seismometer detects the shaking and puts these movements on a seismograph. Seismology studies the cause, repeats, type, and size of earthquakes. The sudden release of tension in the tectonic plates sends waves of energy that travel through the Earth. There can be many earthquakes over a short period of time in a small area. People who study about earthquakes are called seismologists.
The epicenter is the point at ground level directly above the hypocenter.
An earthquake's first point of rupture is called its hypocenter, or focus. The earthquake happens when the tectonic plates are suddenly released, so they start to move very quickly. When they get stuck, they build up tension. The different tectonic plates slowly move past each other. Strong or high-magnitude earthquakes damage buildings.ĭisturbances in the balance of the earth cause earthquakes. San Francisco, California earthquake, sometime in 1906Īn earthquake is when Earth's tectonic plates shake and move Earth's surface.
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