Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pepi..157....8v&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 157, Issue 1-2, p. 8-15.
Physics
3
Scientific paper
In this short contribution, geomagnetic measurements in Central Africa made by Capelo and Ivens two Portuguese explorers during the years 1877 and 1885 are provided. We show the scarce number of geomagnetic observation in Africa compiled until now. These Portuguese explorers performed a considerable amount of measurements of geomagnetic declination (44 measurements), inclination (50) and horizontal component (50) of the geomagnetic field. We compared the results attained by these keen observers with those derived from the global geomagnetic model by Jackson et al. [Jackson, A., Jonkers, A.,Walker, M., 2000. Four centuries of geomagnetic secular variation from historical records. Philos. Trans. R. Soc. Lond. 358, 957 990].
Trigo Ricardo Machado
Vaquero José M.
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