Table of Contents
ISRN Geophysics
Volume 2013 (2013), Article ID 909258, 7 pages
http://dx.doi.org/10.1155/2013/909258
Research Article

Day-to-Day Variability of H and Z Components of the Geomagnetic Field at the African Longitudes

1Department of Physics and Industrial Physics, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Nigeria
2Industrial Physics Department, Ebonyi State University, P.M.B. 053, Abakaliki, Nigeria

Received 21 June 2013; Accepted 17 July 2013

Academic Editors: G. Mele, F. Monteiro Santos, and A. Streltsov

Copyright © 2013 T. N. Obiekezie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. W. H. Campbell, “The regular geomagnetic-field variations during quiet solar conditions,” in Geomagnetism, J. Jacobs, Ed., vol. 3, pp. 386–460, Academic Press, San Diego, Calif, USA, 1989. View at Google Scholar
  2. S. Chapman, “The solar and lunar diurnal variation of the earth magnetism,” Philosophical Transactions of the Royal Society A, vol. 218, pp. 1–118, 1919. View at Google Scholar
  3. P. N. Mayaud, “Analyse morphologique de la variabilité jour-à-jour de la variation journalière “régulière” SR du champ magnétique terrestre, II—Le système de courants CM (Régions non-polaires),” Annals of Geophysics, vol. 21, pp. 514–544, 1965. View at Google Scholar
  4. E. C. Butcher and G. M. Brown, “The variability of Sq(H) on normal quiet days,” The Geophysical Journal of the Royal Astronomical Society, vol. 64, no. 2, pp. 527–537, 1981. View at Publisher · View at Google Scholar
  5. A. Palumbo, “Lunar and solar daily variations of the geomagnetic field at Italian stations,” Journal of Atmospheric and Terrestrial Physics, vol. 43, no. 7, pp. 633–642, 1981. View at Google Scholar · View at Scopus
  6. V. W. J. H. Kirchhoff and L. A. Carpenter, “The day-to-day variability in ionospheric fields and currents,” Journal of Geophysical Research, vol. 81, pp. 2737–2742, 1976. View at Google Scholar
  7. J. M. Torta, “Behavior of the quiet day ionospheric current system in the European region,” Journal of Geophysical Research A, vol. 102, no. 2, Article ID 96JA03463, pp. 2483–2494, 1997. View at Google Scholar · View at Scopus
  8. M. Hasegawa, “Geomagnetic Sq current system,” Journal of Geophysical Research, vol. 65, pp. 1437–1447, 1960. View at Google Scholar
  9. C. A. Onwumechili, “A study of the equatorial electrojet-I: an experimental study,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 13, pp. 222–234, 1959. View at Google Scholar
  10. C. A. Onwumechili, “Geomagnetic variations in the equatorial zone,” in Physics of Geomagnetic Phenomena, S. Matsushita and W. H. Campbell, Eds., vol. 1, pp. 425–507, Academic press, New York, NY, USA, 1967. View at Google Scholar
  11. A. B. Rabiu, Day-to-day variability in the geomagnetic variations at the low latitude observatory of Muntilupa in the Philippines [M.S. thesis], University of Nigeria, Nsukka, Nigeria, 1992.
  12. F. N. Okeke, Day-to-day variability in the geomagnetic variations in the equatorial zone [Ph.D. thesis], University of Nigeria, Nsukka, Nigeria, 1995.
  13. F. N. Okeke, C. A. Onwumechili, and B. A. Rabiu, “Day-to-day variability of geomagnetic hourly amplitudes at low latitudes,” Geophysical Journal International, vol. 134, no. 2, pp. 484–500, 1998. View at Publisher · View at Google Scholar · View at Scopus
  14. T. N. Obiekezie and G. A. Agbo, “Day to day variability of Sq(H) variation in the Indian sector,” JANS, vol. 3, pp. 81–85, 2008. View at Google Scholar
  15. T. N. Obiekezie, “Geomagnetic field variations at dip equatorial latitudes of West Africa International,” Journal of Physical Sciences, vol. 7, no. 36, pp. 5372–5377, 2012. View at Google Scholar
  16. T. N. Obiekezie and F. N. Okeke, “Solar quiet day ionospheric source current in the West African region,” Journal of Advanced Research, vol. 4, no. 3, pp. 303–305, 2013. View at Publisher · View at Google Scholar
  17. A. B. Rabiu, A. I. Mamukuyomi, and E. O. Joshua, “Variability of equatorial ionosphere inferred from geomagnetic field measurements,” The Bulletin of the Astronomical Society of India, vol. 35, pp. 607–618, 2007. View at Google Scholar
  18. A. Onwumechili, “Fluctuations in the geomagnetic horizontal field near the magnetic equator,” Journal of Atmospheric and Terrestrial Physics, vol. 17, no. 4, pp. 286–294, 1960. View at Google Scholar · View at Scopus
  19. S. Matsushita, “Dynamo currents, winds and electric fields,” Radio Science, vol. 4, p. 771, 1969. View at Google Scholar
  20. W. H. Campbell, “Occurrence of AE and Dst geomagnetic index levels and the selection of the quietest days in the year,” Journal of Geophysical Research, vol. 84, p. 875, 1979. View at Google Scholar
  21. A. B. Rabiu, “Night time geomagnetic variations at middle latitudes Nigerian,” Journal of Physics, vol. 85, pp. 35–37, 1996. View at Google Scholar
  22. T. N. Obiekezie and S. C. Obiadazie, “The variability of H component of geomagnetic field at the African sector,” Physical Review & Research International, vol. 3, no. 2, pp. 154–160, 2013. View at Google Scholar
  23. O. Fambitakoye and P. N. Mayaud, “Equatorial electrojet and regular daily variation SR-I. A determination of the equatorial electrojet parameters,” Journal of Atmospheric and Terrestrial Physics, vol. 38, no. 1, pp. 1–17, 1976. View at Google Scholar · View at Scopus
  24. C. A. Onwumechili and P. O. Ezema, “On the course of the geomagnetic daily variation in low latitudes,” Journal of Atmospheric and Terrestrial Physics, vol. 39, no. 9-10, pp. 1079–1086, 1977. View at Google Scholar · View at Scopus
  25. F. H. Hibberd, “Day-to-day variability of the Sq geomagnetic field variation,” Australian Journal of Physics, vol. 34, no. 1, pp. 81–90, 1981. View at Google Scholar
  26. E. Vestine, The Geomagnetic Field, Its Description and Analysis, Carnegie Institute, Washington, DC, USA, 1947.
  27. A. B. Rabiu, Geomagnetic field variations at the middle latitudes [Ph.D. thesis], University of Nigeria, Nsukka, Nigeria, 2000.
  28. S. Alex, B. D. Kadam, and R. G. Rastogi, “A new aspect of daily variations of the geomagnetic field at low latitude,” Journal of Atmospheric and Terrestrial Physics, vol. 54, no. 7-8, pp. 863–869, 1992. View at Google Scholar · View at Scopus
  29. T. N. Obiekezie and F. N. Okeke, “External Sq currents in the West African region,” Moldavian Journal of the Physical Sciences, vol. 9, no. 1, pp. 117–122, 2010. View at Google Scholar
  30. T. N. Obiekezie and F. N. Okeke, “Variations of geomagnetic H, D and Z field intensities on Quiet days at West African latitudes Moldavian,” Journal of Physical Science, vol. 8, no. 3-4, pp. 366–372, 2009. View at Google Scholar
  31. W. H. Campbell, “An external current representation of the quiet night side geomagnetic field level changes,” Journal of Geomagnetism and Geoelectricity, vol. 36, pp. 257–265, 1984. View at Google Scholar
  32. G. A. Agbo, A. O. Chikwendu, and T. N. Obiekezie, “Variability of daily horizontal component of geomagnetic field component at low and middle latitudes,” Indian Journal of Scientific Research, vol. 1, no. 2, pp. 1–8, 2010. View at Google Scholar
  33. P. Gouin and P. N. Mayaud, “A propos de l'existence possible d'un contre-électrojet aux longitudes magnétiques équatoriales,” Annals of Geophysics, vol. 23, pp. 41–47, 1967. View at Google Scholar
  34. P. N. Mayaud, “Comment on “the ionospheric disturbances dynamo” by M. Blanc and A.D. Richmond,” Journal of Geophysical Research, vol. 87, pp. 6353–6355, 1967. View at Google Scholar