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Extreme Field-Aligned Currents during Magnetic Storms of the 24th Solar Cycle: March 2015 and September 2017

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Abstract

Characteristics of field-aligned currents (FACs) obtained from the observations of SWARM satellites during two strong magnetic storms in March 16–19, 2015 and September 6–9, 2017 are presented. The storms were accompanied by high-intensity substorms. Satellites crossed the dusk, noon, pre- and after midnight MLT sectors. It was shown that variations in FAC density and the latitudinal position of the equatorial FAC boundaries are controlled by both the development of the storm and, to a considerable degree, substorm activity. The average densities of downward and upward FACs reach 3–4 μA/m2 at a substorm’s peak, while the undisturbed level is about 0.2 μA/m2. The minimum latitude of equatorial FAC boundaries is limited to 50° MLat. Large-scale FACs consist of small-scale filamentary structures with high current density, which are always present in SWARM observations. Small-scale peak currents with a density of 50–100 µA/m2 appear during periods of a general increase in density during activation of substorms. Local increases in concentration and temperature of electrons show that the current structure can be associated with a mesoscale discrete auroral arc.

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REFERENCES

  1. Iijima, T. and Potemra, T.A., The amplitude distribution of field-aligned currents at northern high latitudes observed by Triad, J. Geophys. Res., 1976, vol. 81, no. 13, pp. 2165–2174. https://doi.org/10.1029/JA081i013p02165

    Article  ADS  Google Scholar 

  2. Lui, A.T.Y., Current disruption in the Earth’s magnetosphere: Observations and models, J. Geophys. Res., 1996, vol. 101, pp. 13067–13088.

    Article  ADS  Google Scholar 

  3. Weimer, D.R., Maps of ionospheric field-aligned currents as a function of the interplanetary magnetic field derived from Dynamics Explorer 2 data, J. Geophys. Res., 2001, vol. 106, pp. 2889–12902.

    Google Scholar 

  4. Papitashvili, V.O., Christiansen, F., and Neubert, T., A new model of field-aligned currents derived from high-precision satellite magnetic field data, Geophys. Res. Lett., 2002, vol. 29, no. 14, pp. 28-1–28-4. https://doi.org/10.1029/2001GL014207

  5. Wang, H., Lühr, H., Ma, S.Y., et al., Field-aligned currents observed by CHAMP during the intense 2003 geomagnetic storm events, Ann. Geophys., 2006, vol. 24, pp. 311–324. https://doi.org/10.5194/angeo-24-311-2006

    Article  ADS  Google Scholar 

  6. Anderson, B.J. and Korth, H., Saturation of global field aligned currents observed during storms by the Iridium satellite constellation, J. Atmos. Sol.-Terr. Phys., 2007, vol. 69, pp. 166–169.

    Article  ADS  Google Scholar 

  7. Lukianova, R., Hanuise, C., and Christiansen, F., Asymmetric distribution of the ionospheric electric potential in the opposite hemispheres as inferred from the SuperDARN observations and FAC-based convection model, J. Atmos. Sol.-Terr. Phys., 2008, vol. 70, pp. 2324–2335. https://doi.org/10.1016/j.jastp.2008.05.015

    Article  ADS  Google Scholar 

  8. Neubert, T. and Christiansen, F., Small-scale, field-aligned currents at the top-side ionosphere, Geophys. Res. Lett., 2003, vol. 30, no. 19, p. 2010. https://doi.org/10.1029/2003GL017808

    Article  ADS  Google Scholar 

  9. Dunlop, M.W., Yang, Y.-Y., Yang, J.-Y., et al., Multispacecraft current estimates at Swarm,J. Geophys. Res.: Space Phys., 2015, vol. 120. https://doi.org/10.1002/2015JA021707

  10. Juusola, L., Kauristie, K., Vanhamäki, H., et al., Comparison of auroral ionospheric and field-aligned currents derived from Swarm and ground magnetic field measurements, J. Geophys. Res.: Space Phys., 2016, vol. 121, pp. 9256–9283. https://doi.org/10.1002/2016JA022961

    Article  ADS  Google Scholar 

  11. McGranaghan, R.M., Mannucci, A.J., and Forsyth, C., A comprehensive analysis of multiscale field-aligned currents: Characteristics, controlling parameters, and relationships, J. Geophys. Res.: Space Phys., 2017, vol. 122, pp. 11931–11960. https://doi.org/10.1002/2017JA024742

    Article  ADS  Google Scholar 

  12. Ritter, P. and Lühr, H., Curl-B technique applied to Swarm constellation for determining field-aligned currents, Earth Planets Space, 2006, vol. 58, no. 4, pp. 463–476.

    Article  ADS  Google Scholar 

  13. SWARM Level 2 Processing System Consortium. Detailed Processing Model (DPM) FAC, Tech. Rep. SW-DS-GFZ-GS-0002, 2012.

  14. Milan, S.E., Cowley, W.H., Lester, M., et al., Response of the magnetotail to changes in the open flux content of the magnetosphere, J. Geophys. Res., 2004, vol. 109. https://doi.org/10.1029/2003JA010350

  15. Aikio, A.T., Lakkala, T., Kozlovsky, A., and Williams, P.J.S., Electric fields and currents of stable drifting auroral arcs in the evening sector, J. Geophys. Res., 2002, vol. 107, pp. SIA 3-1–SIA 3-14. https://doi.org/10.1029/2001JA009172

  16. Elphic, R.C., Bonnell, J.W., Strangeway, R.J., et al., The auroral current circuit and field-aligned currents observed by FAST,Geophys. Res. Lett., 1998, vol. 25, pp. 2033–2036.

    Article  ADS  Google Scholar 

  17. Janhunen, P., Olsson, A., Amm, O., and Kauristie, K., Characteristics of a stable arc based on FAST and MIRAC-LE observations, Ann. Geophys., 2000, vol. 18, pp. 152–160.

    Article  ADS  Google Scholar 

  18. Wu, J., Knudsen, D.J., Gillies, D.M., et al., Swarm observation of field-aligned currents associated with multiple auroral arc systems, J. Geophys. Res.: Space Phys., 2017, vol. 122, pp. 10145–10156. https://doi.org/10.1002/2017JA024439

    Article  ADS  Google Scholar 

  19. Meng, C.I., Dynamic variation of the auroral oval during intense magnetic storms, J. Geophys. Res., 1984, vol. 89, pp. 227–235.

    Article  ADS  Google Scholar 

  20. Lukianova, R. and Kozlovsky, A., Dynamics of polar boundary of the auroral oval derived from the IMAGE satellite data, Cosmic Res., 2013, vol. 1, pp. 46–53.

    Article  ADS  Google Scholar 

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Correspondence to R. Yu. Lukianova.

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Translated by N. Topchiev

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Lukianova, R.Y. Extreme Field-Aligned Currents during Magnetic Storms of the 24th Solar Cycle: March 2015 and September 2017. Cosmic Res 58, 65–78 (2020). https://doi.org/10.1134/S0010952520020069

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