An earthquake of magnitude 4.2 occurred in Shimian County, Ya 'an City, Sichuan Province. What caused the earthquake?

There are obvious earthquakes in many areas of Sichuan, with magnitude 6.8 in Luding and 4.2 in Shimian County of Ya 'an City, which makes residents in many parts of Sichuan face the situation of returning home, and even dozens of people are unfortunately killed in this earthquake. The cause of this earthquake is not very clear, but Sichuan itself is in the earthquake zone, and there are often large and small earthquakes throughout the year, so the occurrence of this earthquake is also expected, but it also makes many people very sad to see such a scene.

There are many reasons for earthquakes. In 2022, Sichuan was affected by dry weather, resulting in dry soil in many areas. Therefore, it is necessary for people to guess that the Sichuan earthquake may be caused by the situation. Moreover, the multi-level scope of the earthquake was very wide, and it was felt in Sichuan, Qinghai-Tibet Plateau, Zhengzhou, Guangdong and other areas. Even there were many aftershocks near the earthquake center, and infrastructure such as communication, water, electricity and transportation were also damaged to varying degrees.

The main reason of this earthquake is that Sichuan is located in the earthquake zone, and the continuous movement of blocks drives the changes of the crust, resulting in obvious seismic response on the surface of the crust. Moreover, the area where the earthquake occurred had obvious earthquake response before this. 65438-0973 A strong earthquake of magnitude 7.6 occurred in this seismic zone, so it is still very likely to happen according to the degree of stratum and surface rupture.

In addition, many areas in Sichuan are located in the deep valleys of the basin. If there is rainfall, it will also cause natural disasters such as gravel cracking and landslides, as well as geological disasters. Therefore, local authorities should keep a high degree of attention and vigilance after the earthquake to avoid this situation. We must also do a good job in transferring the masses, let them stay in safer places, and ensure that they can enjoy sufficient materials.