what is the preface of earthquake for project of class 9th
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Answer:
Earthquake is one of the biggest natural disasters, which is caused by seismic waves. These are created with sudden release of energy in the Earth's lithosphere.
Earthquake
An earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to propel objects and people into the air, and wreak destruction across entire cities. The seismicity, or seismic activity, of an area is the frequency, type, and size of earthquakes experienced over a period of time. The word tremor is also used for non-earthquake seismic rumbling.