A magnitude 6.2 earthquake occurred in Jishi Mountain, Gansu Province, China, causing triggers to cause triggers, causing triggered triggered triggered triggered triggers.The local sands occurred in the citizens of Haidong in Qinghai Province and the county, Zhongchuan Township, in the county. Among them, Jintian Village and Caotan Village were surrounded by silt, which has caused 20 people to lose contact.
Comprehensive CCTV News and Haidong Daily reported that around 5 am on Tuesday (December 19), some houses and livestock houses were buried in some houses and livestock houses in Jingshang Village and Caotan Village; at 6 o'clock, the village entrance formedSandy, most of the nearby houses were buried.
Because the weather is cold, the sand is in a semi -frozen state. Rescuers put out a life -saving passage in the sand rushing in the sandy rushing in the sand to start the rescue.
According to Qi Fengong, a cadre of the native of Zhongchuan, the people in the county, when he arrived at the scene in about 10 minutes on the earthquake, the mud had already turned out.
Han Yanyan, a senior engineer of the China Earthquake Network Center, introduced that after many large earthquakes occur, the so -called "sand rushing phenomenon" will appear.Due to the vibration of the crust, a strong liquefaction phenomenon will be performed in the depths of the underground. The liquefied sand layer will be squeezed along a certain passage and will directly reach the surface and form sandy phenomena.
Han Yanyan said that during the process of squeezing and deformation, there may be more water -content layers underground, and sand will occur during the squeezing process.This is related to the water content of the underground water layer, and it is also related to the degree of squeezing deformation, so there may be more and less phenomenon.
Han Yanyan also said that there are more sand rushing, not necessarily that the subsequent earthquake may come; no sand surge occurs, nor does it mean that it is safe; the two is not directly related, just a normal phenomenon.
A magnitude 6.2 earthquake occurred late at night on Monday (December 18), Gansu Province, which has caused 131 people in Gansu and Qinghai provinces.Qinghai has established the "12 · 18" earthquake earthquake -resistant disaster relief site headquarters.
