Abstract. The Tazones Lighthouse slope shows different active mass movements affecting an area of 70.000 m² of the Cantabrian Coast (N Spain), characterized by almost vertical rocky cliffs developed on Jurassic rocks: alternating marl, sandstone and limestone with three main stratigraphic and structural discontinuity families. Between June 2018 and May 2020, 22 monthly monitoring campaigns have been carried out to measure the displacement of 38 control points, located between 95–110 masl. The total station monitoring has been complemented by ortophoto analysis and detailed digital terrain models (DTM) from two drone flights. Since the beginning of the 3D monitoring, about the 50 % of the markers moved more than 1 m, one of them exceeding 15 m. Detailed DTM has shown that the increased activity is controlled by the discontinuities. There is an extraordinary correlation between displacement acceleration and precipitation and soil moisture: the largest displacements have occurred after 2 periods of intense rain (January and October–November 2019, with a maximum 24-hour precipitation of 64.5 mm and 82.1 mm, respectively, and soil moisture values higher than 90 %). This represents an exceptional opportunity to analyse in real time the Jurassic cliffs retreat of the Cantabrian Coast, a question that remained not quantified.

中文翻译：

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Tazones灯塔坡度（西班牙坎塔布连海岸）的演变。2018年至2020年之间的多学科监控

摘要。Tazones灯塔的斜坡显示出不同的活动质量运动，影响面积为70.000 m ²坎塔布连海岸（西班牙北部）的特征是在侏罗纪岩石上形成了几乎垂直的岩石峭壁：交替的泥灰岩，砂岩和石灰岩，具有三个主要的地层和结构不连续性族。在2018年6月至2020年5月之间，每月进行22次监测运动，以测量位于95-110马尔斯之间的38个控制点的位移。全站仪监控得到了两次无人机飞行的正射影像分析和详细的数字地形模型（DTM）的补充。自3D监视开始以来，大约50％的标记移动了1 m以上，其中一个超过15 m。详细的DTM显示，增加的活动受不连续性控制。位移加速度与降水和土壤湿度之间存在非凡的关联：最大的位移发生在2次强降雨之后（2019年1月和10月至11月，最大24小时降水分别为64.5 mm和82.1 mm，土壤水分值高于90％）。这是实时分析坎塔布连海岸侏罗纪悬崖撤退的绝佳机会，这个问题尚未量化。