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ANGEO | Articles | Volume 38, issue 5
Ann. Geophys., 38, 953–968, 2020
https://doi.org/10.5194/angeo-38-953-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Ann. Geophys., 38, 953–968, 2020
https://doi.org/10.5194/angeo-38-953-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 04 Sep 2020

Regular paper | 04 Sep 2020

Semiannual variation of Pc5 ultra-low frequency (ULF) waves and relativistic electrons over two solar cycles of observations: comparison with predictions of the classical hypotheses

Facundo L. Poblet et al.

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Semiannual Variation in radiation belts particle fluxes: Van Allen probes observations
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Ann. Geophys. Discuss., https://doi.org/10.5194/angeo-2018-98,https://doi.org/10.5194/angeo-2018-98, 2018
Manuscript not accepted for further review
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Cited articles

Azpilicueta, F. and Brunini, C.: A new concept regarding the cause of ionosphere semiannual and annual anomalies, J. Geophys. Res.- Space, 116, A01307, https://doi.org/10.1029/2010JA015977, 2011. a
Azpilicueta, F. and Brunini, C.: A different interpretation of the annual and semiannual anomalies on the magnetic activity over the Earth, J. Geophys. Res.-Space, 117, A08202, https://doi.org/10.1029/2012JA017893, 2012. a
Bai, S., Shi, Q., Tian, A., Nowada, M., Degeling, A. W., Zhou, X.-Z., Zong, Q.-G., Rae, I. J., Fu, S., Zhang, H., Pu, Z., and Fazakerly, A. N.: Spatial Distribution and Semiannual Variation of Cold-Dense Plasma Sheet, J. Geophys. Res.-Space, 123, 464–472, https://doi.org/10.1002/2017ja024565, 2018. a
Baker, D., Allen, J., Belian, R., Blake, J., Kanekal, S., Klecker, B., Lepping, R., Li, X., Mewaldt, R., Ogilvie, K., Onsager, T., Reeves, G., Rostoker, G., Sheldon, R., Singer, H., Spence, H., and Turner, N.: An assessment of space environmental conditions during the recent Anik E1 spacecraft operational failure, ISTP Newsletter, 6, http://pwg.gsfc.nasa.gov/istp/newsletter.html (last access: 1 September 2020), 1996. a
Baker, D. N., McPherron, R. L., Cayton, T. E., and Klebesadel, R. W.: Linear prediction filter analysis of relativistic electron properties at 6.6RE, J. Geophys. Res., 95, 15133, https://doi.org/10.1029/ja095ia09p15133, 1990. a
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High-energy electrons in the magnetosphere can cause operational anomalies in satellites. We investigate regular variations in these electrons and in Pc5 low-frequency waves that are capable of generating the energetic electrons. We find that both variables present similar periods in every solar cycle phase. We focus the analysis on the semiannual variation of these parameters. The shape of the observational semiannual curves correlate very well with the profiles of the main theories.
High-energy electrons in the magnetosphere can cause operational anomalies in satellites. We...
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