The recovery of early geomagnetic data is essential to improve knowledge of the evolution of the geomagnetic field. A recently recovered dataset is described that includes mean decadal (10 days) values of the geomagnetic declination and some disperse values of geomagnetic inclination measured at the Astronomical Observatory of Madrid from 1879 to 1901. These recovered data are compared directly with the results obtained from a geomagnetic model. The data have now been made accessible for the scientific community in digital form.

中文翻译：

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来自马德里天文台的早期地磁数据（1879年至1901年）

早期地磁数据的恢复对于提高对地磁场演变的认识至关重要。描述了一个最近恢复的数据集，其中包括地磁偏角的平均年代际（10天）值和1879年至1901年在马德里天文台测量的地磁倾斜度的一些离散值。地磁模型。数据现已以数字形式提供给科学界。