Earthquakes in Luding County, Sichuan have passed more than a day, causing serious damage to the local area. As rescue work continues, the number of casualties has continued to increase.

has passed more than a day in the earthquake in Luding County, Sichuan, causing serious damage to the local area. As rescue work continues, the number of casualties has continued to increase. After

experienced the pain of 2008, the Wenchuan earthquake once again felt the harm of human disasters such as earthquakes, hoping that the people of the earthquake area would be safe!

has passed on the Internet over time, and more and more videos about this earthquake have been passed on the Internet. The bumps on the road, the house collapses, and the mountain collapses. Although such a earthquake is only 6.8, the destructive power is very huge. So what causes this phenomenon?

Mountain Fracture caused by the earthquake caused by the earthquake in Luding County. Three categories:

1, volcanic earthquake

As the name suggests, it is the earthquake caused by volcanic eruption. The process of the volcanic eruption is actually the magma in the mantle. Through the cracks in the crust, it was squeezed on the surface under high pressure. In the process of

, due to the moment when the volcanic eruption was released, a large amount of energy was released, and the geological plates on both sides of the volcanic crack were oppressed, which eventually led to ground vibration.

2, landing earthquake

inside the earth's crust is not a entity. There are many honeycomb -shaped caves inside.

these caves are mostly composed of solubble rocks such as limestone, which is formed under the long -term erosion of groundwater. In the long -term erosion of groundwater, when its support is not enough to support the top of the cave, it will collapse. To land on earthquakes.

3, Constructing Earthquake

TML0 has 6 major sections, and the sector and the plate collide with each other. Eurasian section was formed.

and these 6 major sections are not a whole, and cracks between the plates will also have cracks. These cracks are often called seismic bands.

will also squeeze each other between these cracks. For example, these cracks are blocked in the middle, and the two sides will accumulate huge stress during the squeezing process. When the accumulated stress exceeds the rock rupture strength, the rock rupture In the moment, these huge stress will be released instantly and hit hard together, causing a severe vibration of the earth. Compared with volcanic seismic and landing earthquakes,

causes huge destructive power to construct a earthquake. The 2008 Wenchuan earthquake and the earthquake were structured, and the earthquake was huge.

Earthquake Destroyer Measurement Standard

said that the cause of the earthquake caused huge destructive power, but there is no explanation of the magnitude 6.8 earthquake, which will cause huge destructive power, which is related to the seismic level.

1, the Li's Earthquake

is usually said to be the earthquake. Special surnames call this earthquake measurement method as Li's earthquake level.

's measurement method of the earthquake is to borrow the level of the brightness of the celestial body in astronomy. When an earthquake occurs in a place, the monitoring station 100 kilometers away from the earthquake center is recorded. Using precision instruments, sometimes underground earthquakes are measured).

is then a distance of 100 kilometers, which is 10 times separately every 1. When the earthquake wave is 10 microns, it is 1 level, 100 microns is 2, and 1000 microns are level 3. The county 6.8 earthquake is measured by this method.

2, Earthquake Earthquake

Li Shi Grade Setting Method is simple and practical, but it has a very large defect, that is, the seismic level is not directly connected with the physical characteristics of the earthquake source.

can only measure the amplitude of the long -distance seismic waves. For example, some earthquake sources are lighter, the time it reaches the ground is shorter, the absorbed energy is smaller, and the destructive power will be greater. This will cause seismic level and actual damage The situation that does not match the strength, just like this magnitude 6.8 earthquake in Luding County, but it is not like the level 6.8 earthquake can be achieved.

aerial picture

So when entering the 1950s, the scientific community proposed the concept of earthquake intensity concepts different from the earthquake .

earthquake intensity means that after the earthquake occurs, the degree of destructiveness of the surface and building destructive power is divided. Due to the different geographical location and geological conditions of various countries, the destruction of buildings is different during the earthquake. There is no unified standard.

is soft in some places, while the soil quality is hard, so in the face of the same level of earthquakes, the destructive power caused by the surface, mountains and buildings must be different. However It is definitely not appropriate, so in the 50 years of the last century, Mr. Li Shanbang, a well -known seismicist in my country, proposed the concept of the basic intensity of the earthquake. It has been widely accepted and widely used in the engineering industry.

is different from the destructive power of the earthquake, and my country divides the earthquake intensity into 12 levels. This time, the Luding County 6.8 earthquake is finally evaluated as a magnitude 9 of its earthquake intensity.

is really because of high intensity levels, so although there are only 6.8 earthquakes this time, the damage caused is quite large, causing a large number of houses to collapse. Fragmentation, Fresh Water River Fracture South Section, Dadu River break, and the closest break from the epicenter is the Fresh Water River Fracture Belt.

Conclusion:

is about this earthquake. Seeing that many people on the Internet have doubts, why shock is only 6.8, but there are a large number of personnel casualties. It is expected that this article can answer this question.

finally expects that the people in the earthquake areas can be safe and pray for blessings to those who died in the earthquake. They also expect scientifically to make precise predictions on the earthquake in the future, so that the earthquake disaster will no longer hurt humans.