Earthquake science knowledge: the magnitude and intensity of the little knowledge

here today with all of you take a look at the little knowledge about the magnitude and intensity of earthquake, believe that before everyone is vague for the earthquake knowledge, you can also go to some VR earthquake simulation factory experience, then we have to understand in detail.

in the first place, the earthquake is a kind of geological phenomenon, is mainly due to the internal force resulting from the earth's crust of the earth vibration phenomenon, the vast majority is generated with rock fracture dislocation, such as volcanic eruptions, cave collapse, landslides, also can cause earthquakes, but its accounts for less than the column, and low intensity, small scope. Second, there are human activities should be directly caused by the earthquake, such as caused by blasting. In addition, produced by human activity is causing the fault rupture induced earthquake, such as reservoir induced earthquake etc. At present, the world has two earthquake activity is frequent seismic zones, namely the Alps - The Himalayan seismic belt and ring the Pacific seismic belt. The former accounted for about 15% of the total number of the earthquake, which accounts for about 80%.

1。 Seismic source ( 1) Source: the birthplace of tectonic earthquake. （ 2) The source on the ground of the epicenter: vertical projection. The largest epicentral area of damage. （ 3) Isoseismal line: outsourcing by vibration damage same line on the ground. （ 4) The classification and features of the seismic wave

2. How many earthquake magnitude is based on the energy released to divide the magnitude. Chinese Academy of Sciences, China earthquake magnitude can be divided into five. Magnitude is 100 km away from the epicenter distance standard seismograph records of maximum amplitude & micro; The number of m logarithmic said. 10毫米→ log10000 = 4 ( Level 4) 100mm→ log10000 = 5 ( Level 5)

3。 Seismic intensity earthquake intensity, it is to point to an area of an earthquake damage to the land and buildings. It is not only related to the magnitude, but also and focal depth, distance from the epicenter, and conditions of seismic wave through the medium ( Nature of rocks, geological structure, buried depth of groundwater) Wait for a variety of factors. The choice of a project from construction sites to the engineering building aseismic measures all have close relationship with seismic intensity.

4。 Magnitude and intensity of the relationship in general, the higher the magnitude, on the source, the closer from the epicenter, the higher the seismic intensity. An earthquake is only a magnitude, but the extent of damage around the epicenter region, decreases gradually with increase of the distance from the epicenter, and formed a number of different earthquake intensity area, the distribution is the most important.

the content of the above detailed introduces for everybody the little knowledge about the magnitude and intensity of earthquake, hope the above introduction will help you have more understanding on this. If you want to learn more knowledge, to recommend pay close attention to the following fuhua WeChat public number.

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