Reconstruction of the IMF polarity from geomagnetic observations

M.V. Vokhmyanin, D.I. Ponyavin

Research output

Abstract

We present a modified method of inferring the IMF polarity from geomagnetic records at polar stations (Sitka, Sodankyla, Godhavn, Thule, Vostok). Our technique is based on the Svalgaard-Mansurov effect. The accuracy of inferring is around 83% for the set of Godhavn, Sitka and Sodankyla (since 1926) and near 90% for all stations (since 1958). In this work we also get the following results: (1) the Rosenberg-Coleman rule is clearly seen from the data, so reversals of the global solar magnetic field were really occurred within last eight solar cycles, however for the period 1906-1925 the success rate of inferring polarity is too low and the R-C rule is difficult to detect; (2) during the descending phase of solar cycle 16 a two-sector structure of IMF is observed similarly to the next even solar cycles.
Original languageEnglish
Title of host publicationProceedings of the 8th International Conference "Problems of Geocosmos" (St.Petersburg, Russia, 20-24 September 2010)
PublisherИздательство Санкт-Петербургского университета
ISBN (Print)ISBN 978-5-9651-0504-5
Publication statusPublished - 2010

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