Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Letter
  • Published:

Daily Variation of the Geomagnetic Field and the Deformation of the Magnetosphere

Abstract

IT is well known that at low latitudes the horizontal component of the geomagnetic field has a maximum Hmax around local noon and a minimum value Hmin between 1800 and 0600 h local time. The range of the daily variation ΔH is strikingly enhanced in the region ±3° geomagnetic latitude due to the electro jet current in the E-region. We have been interested in verifying whether at a low latitude station outside the influence of the electrojet, ΔH represents an increase on the day side over a base level at Hmin, or alternatively it is a decrease on the night side from a base level at Hmax. In the former case, we should have a positive correlation between ΔH and Hmax, with poor correlation between ΔH and Hmin. On the other hand, in the latter case, we should get a negative correlation between ΔH and Hmin and a poor correlation between ΔH and Hmax.

This is a preview of subscription content, access via your institution

Access options

Rent or buy this article

Prices vary by article type

from$1.95

to$39.95

Prices may be subject to local taxes which are calculated during checkout

Similar content being viewed by others

References

  1. Coleman, jun., P. J., and Cummings, W. D., Conjugate Point Symp., Colorado, IV-15-1 (1967).

  2. Cummings, W. D., Barfield, J. N., and Coleman, jun., P. J., J. Geophys. Res., 73, 6687 (1968).

    Article  ADS  Google Scholar 

  3. Williams, D. J., and Mead, G. D., J. Geophys. Res., 70, 3017 (1965).

    Article  ADS  Google Scholar 

  4. Pai, G. L., Bridge, H. S., Lyon, E. F., and Egidi, A., Trans. Amer. Geophys. Un., 48, 176 (1967).

    Google Scholar 

  5. Alfven, H., and Falthammer, C. G., Cosmical Electrodynamics, second ed., 56 (Oxford Univ. Press, New York, 1963).

    Google Scholar 

  6. Axford, W. I., and Hines, C. O., Canad. J. Phys., 39, 1433 (1961).

    Article  ADS  MathSciNet  Google Scholar 

  7. Dungey, J. W., Phys. Rev. Lett., 6, 47 (1961).

    Article  ADS  Google Scholar 

  8. Freeman, jun., J. W., J. Geophys. Res., 73, 4151 (1968).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

SARABHAI, V., NAIR, K. Daily Variation of the Geomagnetic Field and the Deformation of the Magnetosphere. Nature 223, 603–605 (1969). https://doi.org/10.1038/223603a0

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1038/223603a0

This article is cited by

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing