摘要
对时间相近、震级相差不大的2014年8月3日鲁甸M_S6.5地震和10月7日景谷M_S6.6地震造成的滑坡灾害的规模、数量及灾害程度进行对比分析。研究发现造成鲁甸M_S6.5和景谷M_S6.6地震滑坡重大差异的原因主要是:人文环境的差异、岩性的差异、地形地貌的差异以及植被的差异。对于鲁甸震区而言,巨大的地形高差、玄武岩和碳酸盐岩的广泛分布以及强烈的河流侵蚀作用、冰冻风化与化学风化等多种因素的叠加,是造成地震滑坡频繁发生的主要原因。
On 3 Aug 2014 an earthquake with a magnitude of 6. 5 occurred in Ludian. And on Oct. 7. 2014 magnitude 6. 6 earthquake occurred in Jinggu. The two earthquakes occurred in mountain area with little difference in magni- tude. By analyzing the scale, amount and degree of the landslide disaster, we can get four reasons, difference between natural and human environment, lithology difference, difference of landform, and difference in vege- tation. Landslid occurred around the Ludian earthquake area frequently, mainly due to huge terrain elevation, wide distribution of basalt and carbonate rocks, and river erosion, frost physical (frost) weathering and chemi- cal weathering.
出处
《地震研究》
CSCD
北大核心
2017年第1期153-160,共8页
Journal of Seismological Research
基金
大中城市地震灾害情景构建重点项目--地震滑坡危险性分析方法研究(2016QJGJ09)
云南省青年地震科学基金--滇东北重点地区地震人员死亡快速评估分析共同资助
关键词
鲁甸地震
景谷地震
滑坡
自然地理条件
玄武岩
风化作用
Ludian earthquake
Jinggu earthquake
landslide
natural geographical conditions
basalt
weathering