Skip to main content
SpringerLink
Log in

Ionospheric Precursors of Magnetic Storms. 2. Analysis of Slough Station Data

  • Published:
Geomagnetism and Aeronomy Aims and scope Submit manuscript

Abstract

The behavior of the critical frequency of the F2 layer, foF 2, during the 3 days preceding a magnetic storm is analyzed. A total of 254 storms in 1976–2010 were considered, and 1353 events (deviations of foF2 from quiet conditions) were found: 996 and 357 deviations had a positive and negative signs, respectively. It is found that the indicated deviations demonstrate a clearly pronounced and statistically significant dependence on the magnetic storm intensity (the minimal value of the Dst index), on the solar activity level (the F10.7 index), and on the season. The probability of the occurrence of the indicated deviations has clearly pronounced maxima 4–6, 12–13, and 18–20 h prior to the moment of the storm onset (SO). Moreover, the occurrence of the indicated deviations is most probable when the SO moment occurs at 0800–1000 and 1900–2100 LT. The results indicate that the found deviations are not occasional fluctuations in foF2 (Q disturbances) but are related to the subsequent magnetic storm, i.e., they are its precursors.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.
Fig. 6.
Fig. 7.
Fig. 8.
Fig. 9.
Fig. 10.

Similar content being viewed by others

REFERENCES

  1. Danilov, A.D. and Konstantinova, A.V., Long-term changes in the relation between foF2 and hmF2, Geomagn. Aeron. (Engl. Transl.), 2016, vol. 56, no. 5, pp. 577–584.

  2. Danilov, A.D. and Konstantinova, A.V., Ionospheric precursors of geomagnetic storms. 1. A review of the problem, Geomagn. Aeron. (Engl. Transl.), 2019, vol. 59, no. 5, pp. 554–566.

  3. Leshchinskaya, T.Yu. and Mikhailov, V.V., SIMP-1 model: Mapping of foF2 monthly medians over the Northern Hemisphere, Geomagn. Aeron. (Engl. Transl.), 2016, vol. 56, no. 6, pp. 733–741.

  4. Mikhailov, A.V. and Perrone, L., Pre-storm NmF2 enhancements at mid latitudes: Delusion or reality?, Ann. Geophys., 2009, vol. 27, no. 3, pp. 1321–1330.

    Article  Google Scholar 

Download references

ACKNOWLEDGMENTS

The data on the critical foF2 frequencies were taken from the site of Space Weather Services, Sydney, Australia and from the site of the Space Physics Interactive Data Resource (SPIDR) databank.

The authors thank V.V. Mikhailov for the program of the calculation of quiet conditions according to the local model created for the SIMP forecasting model. We also thank Prof. A.V. Mikhailov for the provided materials on the foF2 deviations for Juliusruh station.

Author information

Authors and Affiliations

  1. Fedorov Institute of Applied Geophysics, 129128, Moscow, Russia

    A. V. Konstantinova & A. D. Danilov

Authors
  1. A. V. Konstantinova
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. D. Danilov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to A. V. Konstantinova or A. D. Danilov.

Ethics declarations

The work was supported by the Russian Foundation for Basic Research, project no. 18-05-80 023.

Additional information

Translated by A. Danilov

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Konstantinova, A.V., Danilov, A.D. Ionospheric Precursors of Magnetic Storms. 2. Analysis of Slough Station Data. Geomagn. Aeron. 60, 311–317 (2020). https://doi.org/10.1134/S001679322003010X

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S001679322003010X

Search

Navigation