On May 25, after being reported to the Ministry of Emergency Management and the China Earthquake Administration for approval, the Yunnan Earthquake Administration released a map of the intensity distribution of the magnitude 6.4 earthquake in Yangbi, Yunnan.

　　Earthquake intensity refers to the degree of damage to structures such as the ground and houses, including damage to buildings and changes in natural landscapes.

The intensity of our country is divided into 12 grades, the higher the grade, the heavier the damage.

Among them, buildings with an intensity of 6 degrees and above will have varying degrees of damage.

Generally speaking, in an earthquake, the closer to the epicenter, the greater the intensity value; the further away from the epicenter, the smaller the intensity value.

The seismic intensity map reflects the range and degree of ground impact caused by an earthquake.

　　Earthquake intensity investigation and assessment are important aspects of earthquake response and disposal work, which can lay the core foundation for the assessment of economic losses in earthquake disasters and provide a scientific basis for the recovery and reconstruction planning of disaster areas.

　　The Earthquake Administration of Yunnan Province carried out field surveys on 218 survey points in 53 towns and villages in 7 cities and counties in Dali Prefecture, Yunnan Province, with reference to scientific and technological support achievements such as faulted structures in the earthquake area, distribution of aftershocks, focal mechanism, and instrument intensity distribution maps, combined with strong motions Observation records confirm the intensity distribution of the earthquake.

After review and approval by the China Earthquake Administration, the "Yunnan Yangbi 6.4 Earthquake Intensity Map" was officially released to the public.

　　The highest intensity of the earthquake is Ⅷ degree (8 degree), and the area of ​​Ⅵ degree (6 degree) and above is about 6,600 square kilometers (including Erhai Lake). The long axis of isoseismal is north-northwest trending, the long axis is 106 kilometers, and the short axis 76 kilometers, involving 6 counties and cities in Dali prefecture.

　　Ⅷ (8 degrees) The district covers an area of ​​about 170 square kilometers, mainly involving 3 townships, Cangshanxi Town, Yangjiang Town, and Taiping Township in Yangbi County.

It starts from Hexi Village, Cangshanxi Town, Yangbi County in the east, Dalanba, Cangshanxi Town in the west, Shahe Village, Cangshanxi Town in the south, and Wanpo Village-Sangbulo Village, Yangjiang Town in the north.

　　Ⅶ(7 degrees) The district covers an area of ​​about 930 square kilometers, mainly involving Cangshanxi Town, Yangjiang Town, Fuheng Township, Taiping Township, Shunbi Town, Pingpo Town, Yunlong County Tuanjie Township, Eryuan County Xishan Township, Iron Smelting Township, Zijin Township in Weishan County, Taiyi Township in Dali City, a total of 11 townships.

From the Waihongyan Group of Taiyi Town, Dali City in the east, to the Menshen Group of Tuanjie Township, Yunlong County in the west, from Halashzuo Village, Shunbi Town, Yangbi County to the Enzuchang Group of Taiyi Town, Dali City in the south, to Yangjiang Town, Yangbi County in the north Baoheling.

　　Ⅵ (6 degrees) The district covers an area of ​​about 5,500 square kilometers, mainly involving 42 towns and villages in Yangbi County, Eryuan County, Yunlong County, Yongping County, Weishan County, and Dali City.

It starts from Jiangxi Village, Fengyi Town, Dali City in the east, to Dadianzi, Guanping Township, Yunlong County in the west, from the seat of Jijie Township Government of Yangbi County in the south, and reaches Huaping-Qiaohou Village in Qiaohou Town, Eryuan County in the north.

　　In addition, some areas outside the VI degree (6 degree) area were also affected, and some old houses were damaged.

　　(CCTV reporter Shen Takiyang Wang Xi)