Abstract: This dataset comprises hourly mean values of the horizontal geomagnetic field component H measured at the geomagnetic observatories Tatuoca (TTB, latitude: -1.205°, longitude: 311.487°, elevation: 5 m, Brazil) and Huancayo (HUA, latitude: -12.050°, longitude: -284.670°, elevation: 3313 m, Peru) for the period January 1st, 1957 to December 31st, 2019. TTB data from 1957 to May 2008 is described in the scientific publication Soares et al. (2020), to which this data publication is supplement to. This data comes from Observatório Nacional's ar...
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