Landslides triggered by the 2016 Mj 7.3 Kumamoto, Japan, earthquake

Chong Xu, Siyuan Ma, Zhibiao Tan, Chao Xie, Shinji Toda, Xueqiang Huang

    研究成果: Article査読

    37 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    ページ(範囲)551-564
    ページ数14
    ジャーナルLandslides
    15
    3
    DOI
    出版ステータスPublished - 2018 3 1

    ASJC Scopus subject areas

    • 地盤工学および土木地質学

    フィンガープリント

    「Landslides triggered by the 2016 Mj 7.3 Kumamoto, Japan, earthquake」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル