Landslides triggered by the 2016 Mj 7.3 Kumamoto, Japan, earthquake
Landslides triggered by the 2016 Mj 7.3 Kumamoto, Japan, earthquake
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DOI：
10.1007/s10346-017-0929-1
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发表时间：
2018-03
期刊：
影响因子：
6.7
通讯作者：
Chong Xu;Si-yuan Ma;Zhibiao Tan;Chao Xie;S. Toda;Xueqiang Huang
中科院分区：
文献类型：
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作者：
Chong Xu;Si-yuan Ma;Zhibiao Tan;Chao Xie;S. Toda;Xueqiang Huang
本研究旨在建立2016年4月15日（JST为4月16日）日本熊本Mj 7.3（Mw 7.0）地震序列引发的山体滑坡的详细完整清单。根据高分辨率（0.5-2米）光学卫星图像，我们划定了3，467个由地震引发的滑坡，面积约为6.9平方公里。然后，他们进行了验证航空照片具有非常高的分辨率（优于0.5米）和斜场照片。其中3,460个滑坡分布在一个约6000 km ~ 2的椭圆形区域内，长轴为NE-SW向，长轴为120 km，短轴为NW-SE向，短轴为60 km。滑坡多为浅层、中断型福尔斯和滑坡，少数为流动型滑坡和岩土崩塌。滑坡与几个控制因素的相关性分析表明，海拔1000-1200 m，地层Q3-Hvf，地震烈度VIII和VIII+，峰值地面加速度（PGA）0.4-0.6 g的区域记录的滑坡最高丰度。本文还讨论了滑坡的空间格局与地震构造的关系，地震构造的特点是一个走滑断层与一个正常的组成部分和火山活动在研究区。
The aim of this study is to establish a detailed and complete inventory of the landslides triggered by the Mj 7.3 (Mw 7.0) Kumamoto, Japan, earthquake sequence of 15 April 2016 (16 April in JST). Based on high-resolution (0.5–2 m) optical satellite images, we delineated 3,467 individual landslides triggered by the earthquake, occupying an area of about 6.9 km2. Then they were validated by aerial photographs with very high-resolution (better than 0.5 m) and oblique field photos. Of them, 3,460 landslides are distributed in an elliptical area about 6000 km2, with a NE-SW directed 120-km-long long axis and a 60-km-long NW-SE trending short axis. Most of the landslides are shallow, disrupted falls and slides, with a few flow-type slides and rock and soil avalanches. The analysis of correlation between the landslides and several control factors shows the areas of elevation 1000–1200 m, stratum of Q3-Hvf, seismic intensity VIII and VIII+, and peak ground acceleration (PGA) 0.4–0.6 g register the highest landslide abundance. This study also discussed the relationship between the spatial pattern of the landslides and the seismotectonic structure featured by a strike-slip fault with a normal component and the volcanism in the study area.