Reconstruction of the IMF polarity from geomagnetic observations

M.V. Vokhmyanin; D.I. Ponyavin

Reconstruction of the IMF polarity from geomagnetic observations

Кафедра физики Земли

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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 language	English
Title of host publication	Proceedings of the 8th International Conference "Problems of Geocosmos" (St.Petersburg, Russia, 20-24 September 2010)
Publisher	Издательство Санкт-Петербургского университета
ISBN (Print)	ISBN 978-5-9651-0504-5
Publication status	Published - 2010

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Vokhmyanin, M. V., & Ponyavin, D. I. (2010). Reconstruction of the IMF polarity from geomagnetic observations. In Proceedings of the 8th International Conference "Problems of Geocosmos" (St.Petersburg, Russia, 20-24 September 2010) Издательство Санкт-Петербургского университета. http://geo.phys.spbu.ru/materials_of_a_conference_2010/Conference_Index_2010.html

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Vokhmyanin, MV & Ponyavin, DI 2010, Reconstruction of the IMF polarity from geomagnetic observations. in Proceedings of the 8th International Conference "Problems of Geocosmos" (St.Petersburg, Russia, 20-24 September 2010). Издательство Санкт-Петербургского университета. <http://geo.phys.spbu.ru/materials_of_a_conference_2010/Conference_Index_2010.html>

TY - CHAP

T1 - Reconstruction of the IMF polarity from geomagnetic observations

AU - Vokhmyanin, M.V.

AU - Ponyavin, D.I.

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

M3 - Article in an anthology

SN - ISBN 978-5-9651-0504-5

BT - Proceedings of the 8th International Conference "Problems of Geocosmos" (St.Petersburg, Russia, 20-24 September 2010)

PB - Издательство Санкт-Петербургского университета

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