The Luding earthquake is one of the largest areas of global altitude difference!Expert reminder: Be careful of large -scale geological disasters

Text ｜ "China Science News" reporter Yang Chen

According to the formal determination of the China Earthquake Network, at 12:52 on September 5, a magnitude 6.8 earthquake occurred in Luding County, Ganzi Tibetan Autonomous Prefecture, Sichuan Province. The depth of the earthquake was 16 kilometers. After the earthquake, the Emergency Management Department, the Ministry of Natural Resources, and the National Health and Health Commission have sent a working group to the disaster area to guide the rescue and relief. Sichuan Province and Ganzi Prefecture have organized rescue forces to carry out disaster relief work, and emergency disaster relief supplies such as tents, quilts, and folding beds are resolved to the disaster area. Earthquake relief work is conducting in an orderly manner.

"After the earthquake, disasters and dangerous slopes such as falling stones, rolling stones, landslides, and hidden dangers of mudslides or flood disasters outbreaks of mountain dumplings after rainfall should be paid to whether it is possible to form a dammed lake." Xie Hong, a researcher at the Institute of Mountain Disaster and Environment, said that because the epicenter is located in the Gongga Shandong slope, near the Mindi Town and Hailu Gou Scenic Area in Luding County, it is one of the largest high altitude differences in the world. Essence

Gongga Mountain is the highest peak of Hengshan Mountain with an altitude of 7556 meters. The mountain peaks to the Greater River at the Dadu River at a distance of about 29 kilometers (about 1100 meters above sea level), the relative height difference is 6456 meters, and the terrain is extremely steep. The earthquake will directly destroy the hillside and stimulate mountain disasters such as landslides, collapse, and falling rocks. In 1786, a magnitude 7.75 earthquake occurred in the west to stimulate the landslide of the Mo Gangling, blocking the Dadu River to form a dammed lake. In the past 10 days, the dammed lake was collapsed.

"The Hailuo Gallery Glacier Forest Park and the Yanzigou Scenic Area, with modern glaciers, Hailugou and Yanzigou and the Mozigou between the Hailugou and Yanzigou, are all mudslides. Blotted the Dadu River briefly. After the earthquake is shocked, the glacier may occur in ice. In the case, the scale of Binglian will be greater. "Xie Hong told the China Science News.

Xie Hong pointed out that after the earthquake, the earthquake should pay attention to preventing landslides, collapse, falling stones, mudslides, floods, dammed lakes and other mountain disasters. Judging from conventional experience, after the relevant geological disaster experts arrived at the earthquake site, we must first investigate the hazard rock body on the hillside after the earthquake shake. "If local personnel need to transfer, relevant experts need to help find safety zones for personnel to avoid risk and implement mountain disaster monitoring and early warning."

"China Science News" (2022-09-06 The 1st edition of the news)

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