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Rapid mid-latitude magnetic storms recorded by old observatories |
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Valach, F. (1), Hejda, P. (2), Bochníček, J. (2), Revallo, M. (3), Váczyová, M. (1) |
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(1) Geomagnetic Observatory, Earth Science Institute, Slovak Academy of Sciences, Komárňanská 108, 947 01 Hurbanovo, Slovakia (2) Institute of Geophysics, Academy of Sciences of the Czech Republic, Boční II/1401, 14131 Prague, Czech Republic (3) Earth Science Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 28 Bratislava, Slovakia |
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Recently, a new insight into the mechanism of the Carrington magnetic storm was published, which identified the field aligned currents as the main cause of this well-known event. The new idea seems to be a promising alternative to the generally accepted theory, in which the ring current is the main cause of the low- and mid-latitude magnetic storms. In our presentation, some records of rapid mid-latitude magnetic storms are shown. Most of them were recorded by historical magnetic observatories (years 1837, 1848, 1872, 1918). The profiles of the horizontal component show that, instead of the ring current, the substorm-related current system probably played an important role in the development of these interesting geomagnetic variations. |
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poster |
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