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.

  • Letters to Editor
  • Published:

Enhanced Electron Precipitation in Brazilian Magnetic Anomaly in association with Sudden Commencement

Nature Physical Science volume 240, pages 84–86 (1972)Cite this article

Abstract

Following the first satellite observations of enhanced particle flux in the region of the Brazilian Magnetic Anomaly1,2, various attempts have been made to detect effects associated with the precipitation of radiation belt particles over the region of this anomaly at balloon altitudes3. Since 1968 balloon observations of charged particles and X-rays have been made periodically at the Instituto de Pesquisas Espaciais at São José dos Campos, Brazil. During one of the flights on December 17, 1971, a moderate geomagnetic storm occurred when the balloon was floating at a ceiling altitude of ∼3 mbar. Marked changes in the measured particle flux were observed in association with the changes in the magnetic field. As well as pointing out this correspondence we discuss the observational results in relation to observations made on April 6, 1972, during a magnetically quiet period. To our knowledge this is the first direct detection of particle precipitation in the magnetic anomaly at balloon altitudes.

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

Access options

Buy this article

  • Purchase on Springer Link
  • Instant access to full article PDF
Buy now

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

References

  1. Vernov, S. N., Savenko, I. A., Shavrin, P. I., Nesterov, V. E., Pisarenko, N. F., and Sharvina, K. N., Space Res., 5, 343 (1964).

    Google Scholar 

  2. Vernov, S. N., Gorchakov, E. V., Shavrin, P. I., and Sharvina, K. N., Space Sci. Rev., 1, 490 (1967).

    ADS  Google Scholar 

  3. Ghielmetti, H. S., Becerra, N., Godel, A. M., Heredia, M., and Roederer, J. G., Phys. Rev. Lett., 12, 388 (1964).

    Article  ADS  Google Scholar 

  4. Stassinopoulos, E. G., World Maps of Constant B, L, and Flux Contours, NASA SP-3054 (1970).

    Google Scholar 

Download references

Author information

Author notes

  1. R. PALMEIRA: On leave from the University of Texas at Dallas, USA.

Authors and Affiliations

  1. Institute de Pesquisas Espaciais—INPE, São José dos Campos, SP, Brazil

    I. M. MARTIN, D. B. RAI, J. M. DA COSTA, R. PALMEIRA & N. B. TRIVEDI

Authors
  1. I. M. MARTIN
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. D. B. RAI
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. J. M. DA COSTA
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. R. PALMEIRA
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. N. B. TRIVEDI
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

MARTIN, I., RAI, D., DA COSTA, J. et al. Enhanced Electron Precipitation in Brazilian Magnetic Anomaly in association with Sudden Commencement. Nature Physical Science 240, 84–86 (1972). https://doi.org/10.1038/physci240084a0

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1038/physci240084a0

This article is cited by

Search

Advanced 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