In this work, a landslide event that took place on January 1831 at the Pedregoso Mountains, Cabeza del Buey, SW Spain, is described. This landslide had not been documented to date and was only described in the local press. This event involved an estimated amount of dislodged material in the order of 10⁴ m³. The amount of meteorological data is very scarce as the event occurred before the setting up of the national meteorological service in Spain. However, data from the relatively near location of SW Iberia suggest that the landslide was preceded by a prolonged period of unusually high precipitation totals and that this intense wet period is compatible with the large-scale atmospheric configuration in the winter of 1829–1830. In fact, the North Atlantic Oscillation (NAO) index for that winter achieved one of the most negative values observed in the bicentennial period spanning 1821 to 2019. This multidisciplinary work represents the first attempt to report and describe the main triggering mechanism for an historical landslide in the Extremadura region that is similar to other great historical landslides which have already been documented for other locations in Spain.

中文翻译：

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1831年1月在Pedregoso山脉（西班牙西南部Cabeza Del Buey）发生的大雨和滑坡事件

在这项工作中，描述了1831年1月在西班牙西南部Cabeza del Buey的Pedregoso山脉发生的滑坡事件。迄今为止，尚无该滑坡的文献记载，只有当地媒体对此进行了描述。此事件涉及的估计移动物料量约为10 ⁴ m ³。由于该事件是在西班牙成立国家气象部门之前发生的，因此气象数据的数量非常稀少。但是，来自伊比利亚西南部相对较近位置的数据表明，在滑坡发生之前，出现了异常高的总降水量的长时间，并且这种强烈的湿润时期与1829–1830年冬季的大规模大气构造相适应。实际上，该冬季的北大西洋涛动指数（NAO）达到了1821年至2019年的双百年观察到的最负值之一。