2003 Dayao earthquake

Earthquake in Yunnan, China 2003 Dayao earthquake 2003-07-21 15:16:33 7003234 usp000c30u 2003 07 21 23:16:33 CST (UTC+8) China Yunnan#China 5.9 w y6.1 s y 9.2 km on Strike-slip 25.96 N 101.25 E China VII 19 dead, 644 injured The 2003 Dayao earthquake occurred on July 21, at 23:16:33 CST. The epicenter of the moment magnitude 5.9 earthquake was in Dayao County in the mountainous area of central Yunnan, China. At least 19 people were killed, 644 were injured, and 8,406 families became homeless. The quake also caused $75 million USD in damage. Tectonic setting Yunnan is located at the southeastern edge of the Tibetan Plateau, where the Indian plate is colliding north–northeast into the Eurasian plate (Asia). The continental deformation is accommodated by major faults in the area, mostly of strike-slip movement. The Indian plate pushes into Asia, uplifting the Tibetan Plateau and causes it rotate clockwise, along the Xianshuihe fault system. This deformation spreads into Yunnan, where active strike-slip faulting occurs. Earthquake The earthquake measured 6.1 on the surface-wave magnitude scale. It was the first of two strong earthquakes in the same area that year. In October, a s 6.2 (w 5.6) earthquake struck nearby, killing three people. The July earthquake occurred as a result of shallow strike-slip faulting. Coulomb stress transfer from the July quake increased the chance of failure on nearby faults which triggered the October quake. Impact The earthquake affected 70% of Dayao County, with a total of 148 villages with 48,048 households and a population of 199,509 affected. At least 264,878 houses collapsed and nearly 1.19 million others and 336 schools were damaged In the village of Ganghe, 11 people were killed due to collapsing mudbrick homes. An aftershock on July 23 caused additional collapses and injured 51 people. In Songziyuan village, one person was killed and many homes were destroyed. Large fissures opened in roads and landslides blocked passing vehicles. See also List of earthquakes in 2003 List of earthquakes in China List of earthquakes in Yunnan 2000 Yao'an earthquake References OB 7003234 China 2003 usp000c30u M 6.0 – 75 km SSW of Dadukou, China National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database. NOAA National Centers for Environmental Information Significant Earthquake Information 2003 NOAA National Centers for Environmental Information https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/5707 2022-04-01 10.7289/V5TD9V7K en Wang Fan Wang Min Wang Yanzhao Shen Zheng-Kang Earthquake Potential of the Sichuan-Yunnan Region, Western China Journal of Asian Earth Sciences 2015 107 10.1016/j.jseaes.2015.04.041 https://www.sciencedirect.com/science/article/abs/pii/S1367912015002503 232–243 Elsevier 2015JAESc.107..232W subscription Wang Wei Jun Chen Ling Chen Qi Fu Liu Jie 2003 年大姚地震震中区的速度和衰减结构 Chinese Journal of Geophysics 2007 50 3 770–779 http://www.igg-journals.cn/dzdqs-data/cjg/2007/3/PDF/0001-5733(2007)03-0770-10.pdf https://web.archive.org/web/20220401073247/http://webcache.googleusercontent.com/search?q=cache:WmsNcxCa9pkJ:www.igg-journals.cn/dzdqs-data/cjg/2007/3/PDF/0001-5733(2007)03-0770-10.pdf+&cd=5&hl=en&ct=clnk&gl=sg dead April 1, 2022 Velocity and attenuation structures in the focal area of 2003 Dayao earthquakes zh Liu Ben-yu Miao Sheng Ye Liao-yuan Xiao Mei-ling Damage of village buildings in recent Yunnan earthquakes 4th International Conference on Earthquake Engineering Taipei, Taiwan 2006 266 https://www.researchgate.net/publication/238688071 ACT Alliance ACT Alert 1/2003 China Dayao Earthquake https://reliefweb.int/report/china/act-alert-12003-china-dayao-earthquake ReliefWeb 1 April 2022 29 July 2003 China 2003 usp000cagn M 5.6 – Yunnan, China Xu Xiaofeng Wan Yongge Wang Huilin Stress value in 2003 Dayao MS6.1 earthquake source region Earthquake Science 2011 24 4 343–350 10.1007/s11589-011-0797-z 2011EaSci..24..343X 129935225 free Wang Xiaoshan Feng Xiangdong Diao Guiling Wang Libing Cai Lingling Difference between focal mechanisms of Dayao earthquake doublet sequence Earthquake Science 2009 22 6 667–673 10.1007/s11589-009-0667-0 2009EaSci..22..667W 128413530 https://link.springer.com/article/10.1007/s11589-009-0667-0 Difference between focal mechanisms of Dayao earthquake doublet sequence zh subscription External links 7003234 Category:2003 earthquakes Category:Earthquakes in Yunnan Category:Geography of Chuxiong Yi Autonomous Prefecture Category:2003 disasters in China Category:2003 in China