1976 Longling earthquake

1976 earthquake sequence in the Yunnan-Myanmar border region 1976 Longling earthquake China 1976-05-29 12:23:20 1976-05-29 14:00:22 714808 714811 usp0000gm6 usp0000gm8 20:23:20 22:00:22 6.7 w y, 7.0 s yEHB 714808 6.6 w, 6.9 sEHB 714811 24.49 98.96 region:CN_type:event inline,titleehb 709781 24.54 98.72 region:CN_type:event inlineehb 714811 Longling County, Yunnan 10EXPO-CAT Earthquake Catalog https://earthquake.usgs.gov/static/lfs/data/pager/catalogs/ December 1, 2008 United States Geological Survey Version 2007-12 14 May 2025 yes 98 fatalities, 2,442 injuries 29 May 1976 The 1976 Longling earthquake in Yunnan Province, People's Republic of China, was a doublet earthquake, with two main shocks striking just east of Longling at 12:23:20 and 14:00:22 UTC (20:23 and 22:00 local time). The magnitudes were estimated at 6.7 and 6.6, respectively, on the w y GCMT scale, and 6.9 and 7.0 on the s y scale;EHB 714808 EHB 714811 Chinese sources put these at 7.4 and 7.3 on the s7 y scale.Xu Yang Li Liu 2012 90. The region is noted for the quantity and intensity of its earthquakes, and the complexity of its tectonics, which are closely related to the collision between the Indian and Eurasian tectonic plates.Wang Chan Mooney 2003 ¶23. No one died in the Longling county town.Shen Zongpei 2010. Loss in the 9 counties in Baoshan, Lincang and Dehong were 98 deaths, 451 severe injuries and 1,991 light injuries. 420,000 buildings collapsed in an area of 1883 square kilometers.Annals of Yunnan, Volume 3. 1999, p. 111. Geology Yunnan is a mountainous region lying east of Tibet, and north of the Red River Fault that strikes southeast along the Red River into North Vietnam and the South China Sea. The Red River fault is deep – some believe it may reach the lithosphereLei Zhao Su 2009 ¶5. – and forms a major tectonic boundary that separates Indochina from the South China block.Lei Zhao Su 2009 ¶20. The seismotectonics of Yunnan and the adjacent areas is driven by the collision of the Indian plate with the Eurasian plate.Wang Chan Mooney 2003 ¶1. This has uplifted the Tibetan Plateau (and the Himalaya Mountains) and forced it eastwards, pushing the South China Block and Indochina towards the westward subducting Philippine Sea plate and creating various extensional structures.Lei Zhao Su 2009 ¶20. See also figure 11 in Kusky Windley Zhai 2007 18. All of this has created a complicated geological structure with many faults, which in western Yunnan has allowed heat and fluids from the subducting Indian plate to rise into the upper crust, creating the Tengchong volcanic field to the north of Longling and the Longling fault (location of the first event), and west of the Nu River and Nu River fault (location of the second event).Xu Yang Li Liu 2012 83. It appears that igneous intrusions have weakened the bedrock in this area, which has led to uneven accumulations of stress, which caused the earthquake.Xu Yang Li Liu 2012 90. See also 1976 Songpan–Pingwu earthquake (August 16–23) 1976 Tangshan earthquake (July 28) 1988 Lancang–Gengma earthquakes List of earthquakes in 1976 List of earthquakes in China List of earthquakes in Yunnan Notes Sources 30em cs2 Yunnan 1976a usp0000gm6 M 6.9 – Myanmar-China border region cs2 Yunnan 1976b usp0000gm8 M 7.0 – Myanmar-China border region cs2 EHB Timothy M. Kusky B. F. Windley M.-G. Zhai 129902429 Tectonic evolution of the North China Block: from orogen to craton to orogen 2007 M.-G. Zhai B. F. Windley T. M. Kusky Q. R. Meng Mesozoic Sub-Continental Lithospheric Thinning Under Eastern Asia Geological Society Special Publications 280 280 1 1–34 10.1144/SP280.1 2007GSLSP.280....1K http://sp.lyellcollection.org/content/specpubgsl/280/1/1.full.pdf . Lei Jianshe Zhao Dapeng Su Youjin 2009 Insight into the origin of the Tengchong intraplate volcano and seismotectonics in southwest China from local and teleseismic data Journal of Geophysical Research 114 B05302 B05302 10.1029/2008JB005881 2009JGRB..114.5302L https://www.mantleplumes.org/WebDocuments/Lei_JGR_2009_Yunnan.pdf free. cs2 ShenZongpei Sichuan Earthquake Administration http://www.scdzj.gov.cn/zt/jnsp30/spjnwz/201011/t20101103_16758.html Short-term prediction of the 7.2-magnitude earthquake of Songpan and Pingwu in Sichuan Province in 1976 2018-10-14 2018-10-14 https://web.archive.org/web/20181014204109/http://www.scdzj.gov.cn/zt/jnsp30/spjnwz/201011/t20101103_16758.html dead . November 2018 November 2018 Wang Chun-Yong Chan W. Winston Mooney Walter D. 2003 Three-dimensional velocity structure of crust and upper mantle in southwestern China and its tectonic implications Journal of Geophysical Research 108 B9 2442 10.1029/2002JB001973 2003JGRB..108.2442W https://escweb.wr.usgs.gov/share/mooney/2003_JGR_SWChina.pdf . Wang Jin-nan Wang Yang-long An Xiao-wen Yang Xiang-dong Chang Zu-feng 2006 Activity of the faults in the 1976 Longling M 7.3, 7.4 earthquake area Journal of Seismological Research 29 366–372 http://en.cnki.com.cn/Article_en/CJFDTotal-DZYJ200604008.htm 2018-10-10 2018-10-11 https://web.archive.org/web/20181011014111/http://en.cnki.com.cn/Article_en/CJFDTotal-DZYJ200604008.htm dead (in Chinese with English abstract). Xu Yi Yang Xiatao Li Zhiwei Liu Jianhua 34644263 20 June 2012 Seismic structure of the Tengchong volcanic area southwest China from local earthquake tomography Journal of Volcanology and Geothermal Research 239–240 83–91 10.1016/j.jvolgeores.2012.06.017 2012JVGR..239...83X . Chorography Codification Committee of Yunnan Yunnan Earthquake Administration 云南省志·卷三 地震志 Annals of Yunnan, Volume 3, Earthquake zh Kunming Yunnan People's Publishing House 1999 7-222-02829-3 Chorography External links 714808 1976 Longling Category:1976 in China Category:1976 earthquakes Category:Geography of Baoshan, Yunnan Category:Earthquakes in Myanmar Category:1976 disasters in China Category:May 1976 in Asia