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2011年3月11日,一次MW9.0大地震袭击了日本东北的太平洋沿岸,随后沿着500km长的海岸线产生了巨大的破坏性海啸。此后,在2011年4月11日发生了一次M7.0内陆余震,这次余震造成了陆地上地表断层出现破裂。这些地震在日本本州岛东北部造成了各种类型的滑坡灾害。地震造成的全部滑坡灾害尚在调查统计之中。这份简短的报告介绍了日本滑坡学会迄今为止调查到的一些滑坡现象。这些滑坡包括:(1)福岛县须贺川水库堤坝的失稳;(2)4月11日福岛县磐城镇余震造成的滑坡及地震地表破裂;(3)宫城县松岛湾密集分布的浅表破坏;(4)仙台市周边居民区一些人工改造斜坡上发育的小滑坡。
On March 11, 2011, a massive MW9.0 earthquake hit the Pacific coast of northeastern Japan, followed by a huge devastating tsunami along the 500-km long coastline. Since then, an M7.0 inland aftershock took place on April 11, 2011, which caused a rupture of the surface faults on land. These earthquakes caused various types of landslide hazards in northeastern Honshu, Japan. All landslides caused by the earthquake disaster are still under investigation. This brief report presents some of the landslides investigated so far by the Japan Landslide Society. These landslides include: (1) instability of the Sukagawa reservoir dam in Fukushima Prefecture; (2) landslides and seismic rupture caused by aftershocks in Iwaki City, Fukushima Prefecture, on April 11; (3) Miyagi Prefecture Matsushima Bay intensive Distributed shallow damage; (4) surrounding Sendai City, some of the artificial transformation of the slope on the development of small landslides.