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地震基本知识问答(Earthquake basic knowledge qa).doc

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地震基本知识问答(Earthquake basic knowledge qa) Earthquake knowledge 70 questions The first part of the earthquake is common sense What is the inner structure of the earth? A: the outermost crust of the earth is called the crust; The lower part of the crust is called the mantle; The center of the earth is called the core. The earths average radius is about 6,370 kilometers, and the crust is about 35 kilometers thick, and most devastating earthquakes occur in the earths crust. What is the surface of the earth made of? Answer: the surface of the earth, is not a complete rock, but made up of plates of various sizes each other Mosaic, one of the biggest seven pieces, they are the Antarctic plate, Eurasian plate, north American, South American plate and the Pacific plate plate plate, India, Australia and Africa. These plates drift and crush and collide each year at a speed of several centimeters to a dozen centimeters a year in the mantle. What is an earthquake? A: earthquake is a natural phenomenon caused by the earths internal motions. The tectonic plates and plates of the earth collide with each other, causing the dislocation and rupture of the plate boundary and tectonic plates, which is the main cause of ground vibration (i.e., earthquake). 4. How much energy does the earthquake release? A: the energy released by the earthquake determines the magnitude of the earthquake, and the greater the magnitude of the energy released, the magnitude of the earthquake is about 30 times the energy difference. In 1995, a magnitude 7.2 earthquake in Osaka, Japan, released the equivalent of about 1,000 U.S. atomic bombs dropped on Nagasaki, Japan, during world war ii. How many types of earthquake are there? A: there are tectonic earthquakes, volcanic earthquakes, landslides, earthquakes and man-made earthquakes 6. What is tectonic earthquake? A: earthquakes caused by the dislocation and rupture of underground strata are called tectonic earthquakes. Such earthquakes are the most frequent and
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