Abstract. On the 17 June 2017, a massive landslide which mobilized 35–58 million m 3 of material entered the Karrat Isfjord in western Greenland. It triggered a tsunami wave with a runup height exceeding 90 m close to the landslide, ca. 50 m on the opposite shore of the fjord. The tsunami travelled ca. 32 km along the fjord and reached the settlement of Nuugaatsiaq with ca. 1–1.5 m high waves which flooded the terrain up to 9 m a.s.l. (above sea level). Tsunami waves were powerful enough to destroy the community infrastructure, impact fragile coastal tundra landscape, and unfortunately injure several inhabitants and cause four deaths. Our field survey carried out 25 months after the event results in documentation of the previously unreported scale of damage in the settlement (ca. 48 % of infrastructure objects including houses and administration buildings were destroyed by the tsunami). We have observed a recognizable difference in the concentration of tsunami deposit accumulations between areas of the settlement overwashed by the wave and areas of runup and return flow. The key tsunami effects preserved in the coastal landscape were eroded coastal bluffs, gullied and dissected edges of cliffed coast in the harbour, and tundra vegetation compressed by boulders or icebergs rafted onshore during the event.

中文翻译：

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北极海啸威胁着沿海景观和社区——2017 年格陵兰西部努加奇亚克的卡拉特峡湾海啸影响调查

摘要。2017 年 6 月 17 日，一场大规模山体滑坡移动了 35-58 百万立方米的物质，进入了格陵兰西部的卡拉特峡湾。它在靠近滑坡的地方引发了海啸，其上升高度超过 90 m。50 m 在峡湾的对岸。海啸传播了大约。沿着峡湾行驶 32 公里，大约到达 Nuugaatsiaq 定居点。1-1.5 m 高的海浪淹没了高达 9 m asl（海平面以上）的地形。海啸的威力足以摧毁社区基础设施，影响脆弱的沿海苔原景观，不幸的是，数名居民受伤并造成 4 人死亡。我们在事件发生 25 个月后进行的实地调查记录了之前未报告的定居点损坏程度（约 包括房屋和行政大楼在内的 48% 的基础设施被海啸摧毁）。我们已经观察到被海浪冲刷的定居点区域与上升和回流区域之间的海啸沉积物聚集浓度存在明显差异。保留在沿海景观中的主要海啸影响是侵蚀的沿海悬崖、海港悬崖海岸的沟壑和解剖边缘，以及在事件期间被漂流到岸上的巨石或冰山压缩的苔原植被。