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Earth's magnetic field in the early 19th century from French sources

Abstract : We present both a description of a new magnetic data set covering predominantly the 18th and 19th centuries and the results derived from it for the small window 1820-1850, from which the bulk of the data originate. The data set comprises measurements of declination taken overwhelmingly on French naval and hydrographic vessels. A list of the vessels is given for one of the data sets. When augmented by extant inclination measurements, the data are capable of resolving the magnetic field at the core-mantle boundary to a high degree of fidelity and thus are a valuable addition to the data set of historical geomagnetic measurements.
Keywords : geomagnetism
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Geochem Geophys Geosyst - 2003...
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Andrew Jackson, Art R. T. Jonkers, Mioara Mandea, Anne Murray. Earth's magnetic field in the early 19th century from French sources. Geochemistry, Geophysics, Geosystems, AGU and the Geochemical Society, 2003, 4, pp. 767-782. ⟨10.1029/2002GC000494⟩. ⟨insu-03598415⟩

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