Magnetic declination measurements over European Russia and Siberia in the 18th century |
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| Authors: | O M Raspopov V V Meshcheryakov |
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| Institution: | 1.Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, St. Petersburg Branch,Russian Academy of Sciences,St. Petersburg,Russia |
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| Abstract: | The paper presents the history of measurements of the geomagnetic field parameters over the territory of Russia in the 18th
century derived from archival and literature sources. Topographical mapping of the European territory and neighboring seas
of the Russian Empire from the late 17th to the mid 18th century during which magnetic measurements were made was of great
importance for determining magnetic declination. The magnetic declination in Siberia and its neighboring seas was measured
for the first time during the first expedition of V. Bering in 1728 and then during his second expedition (the Great Northern
Expedition) in 1733–1742. Magnetic measurements were carried out along the northern coast of Siberia and in the Bering Sea.
The academic group of the expedition performed magnetic declination measurements over southern regions of Siberia (Krasnoyarsk,
Irkutsk, Nerchinsk, Yakutsk, etc.) in 1735 and 1736. During the second half of the 18th century, Russian expeditions determined
geographical coordinates of the cities of European Russia and carried out magnetic declination measurements for them. During
these expeditions Inokhodtsev paid attention to the anomalous magnetic declination in the Kursk region. In his opinion, the
anomaly could have been caused by the presence of iron ore. |
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