We report a catastrophic landslide occurred in Gokseong County, South Korea, on August 7, 2020. Torrential rain, with a cumulative rainfall of more than 250 mm for the preceding 3 days, contributed as a trigger or a primer to an initiation of slope failure and ensuing evolution to a debris flow. The runout length, area, and volume of the Gokseong landslide are estimated to be approximately 678 m, 4.63 × 10 4 m 2 , and 2–5 × 10 4 m 3 , respectively. This Gokseong landslide, with its long runout, has caused severe damage to the village located downstream with a total of five fatalities and five buried houses. This study not only reports the damaged area, rainfall characteristics, and triggering factors but also presents the terrain changes obtained through a field survey using unmanned aerial vehicles (UAVs) conducted 5 days after the event and the normalized difference vegetation index (NDVI) using Sentinel-2 data.

中文翻译：

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2020年8月7日在韩国全罗南道谷城郡发生的灾难性山体滑坡初步报告

我们报告了 2020 年 8 月 7 日在韩国 Gokseong 县发生的灾难性山体滑坡。前 3 天累积降雨量超过 250 毫米的暴雨是引发斜坡崩塌的触发因素或导火索并随之演变为泥石流。Gokseong 滑坡的跳动长度、面积和体积估计分别约为 678 m、4.63 × 10 4 m 2 和 2-5 × 10 4 m 3 。这次谷城山体滑坡，由于其长时间的运行，对下游村庄造成了严重破坏，共有 5 人死亡，5 所房屋被掩埋。本研究不仅报告了受灾面积、降雨特征，