Articles | Volume 37, issue 5
Regular paper
09 Oct 2019
Regular paper |  | 09 Oct 2019

Wavelet analysis of the magnetotail response to solar wind fluctuations during HILDCAA events

Adriane Marques de Souza Franco, Ezequiel Echer, and Mauricio José Alves Bolzan

Related authors

Seasonal features of geomagnetic activity: a study on the solar activity dependence
Adriane Marques de Souza Franco, Rajkumar Hajra, Ezequiel Echer, and Mauricio José Alves Bolzan
Ann. Geophys., 39, 929–943,,, 2021
Short summary
Cross-correlation and cross-wavelet analyses of the solar wind IMF Bz and auroral electrojet index AE coupling during HILDCAAs
Adriane Marques de Souza, Ezequiel Echer, Mauricio José Alves Bolzan, and Rajkumar Hajra
Ann. Geophys., 36, 205–211,,, 2018
Short summary

Related subject area

Subject: Magnetosphere & space plasma physics | Keywords: Auroral phenomena
Morphological evolution and spatial profile changes of poleward moving auroral forms
Anton Goertz, Noora Partamies, Daniel Whiter, and Lisa Baddeley
Ann. Geophys., 41, 115–128,,, 2023
Short summary
Surveying pulsating auroras
Eric Grono and Eric Donovan
Ann. Geophys., 38, 1–8,,, 2020
Short summary
A new scenario applying traffic flow analogy to poleward expansion of auroras
Osuke Saka
Ann. Geophys., 37, 381–387,,, 2019
Short summary
Multiscale estimation of the field-aligned current density
Costel Bunescu, Joachim Vogt, Octav Marghitu, and Adrian Blagau
Ann. Geophys., 37, 347–373,,, 2019
Characteristics of the electrojet during intense magnetic disturbances
Liudmila I. Gromova, Matthias Förster, Yakov I. Feldstein, and Patricia Ritter
Ann. Geophys., 36, 1361–1391,,, 2018
Short summary

Cited articles

Addison, P. S.: Introduction to redundancy rules: the continuous wavelet transform comes of age, Philos. T. R. Soc. A, 376, 20170258,, 2018. 
Akasofu, S.-I.: The development of the auroral substorm, Planet Space Sci., 12, 273–282, 1964. 
Akasofu, S.-I.: Energy coupling between the solar wind and the magnetosphere, Space Sci. Rev., 28, 121–190, 1981. 
Akasofu, S.-I.: The relationship between the magnetosphere and magnetospheric/auroral substorms, Ann. Geophys., 31, 387–394,, 2013. 
Axford, W. I. and Hines, C. O.: A unifying theory of high latitude geophysical phenomena and geomagnetic storms, Can. J. Phys., 39, p. 1433, 1961. 
Short summary
The wavelet transform was employed in nine HILDCAA events for intervals in which the Cluster crossed the magnetotail in order to identify the most energetic periods of these events in the magnetotail. It was seen that 76 % of the periods identified are ≤4 h. Using the cross wavelet analysis technique between Bz–IMF components and the Bx geomagnetic components, it was identified that the coupling of energy is stronger in periods between 2 and 4 h, which are typical substorm periods.