Cross-correlation and cross-wavelet analyses of the solar wind IMF Bz and auroral electrojet index AE coupling during HILDCAAs

Marques de Souza, Adriane; Echer, Ezequiel; Bolzan, Mauricio José Alves; Hajra, Rajkumar

doi:https://doi.org/10.5194/angeo-36-205-2018

Articles | Volume 36, issue 1

https://doi.org/10.5194/angeo-36-205-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Space weather connections to near-Earth space and the...

https://doi.org/10.5194/angeo-36-205-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 36, issue 1

Regular paper

|

09 Feb 2018

Regular paper |

| 09 Feb 2018

Cross-correlation and cross-wavelet analyses of the solar wind IMF B_z and auroral electrojet index AE coupling during HILDCAAs

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

Data sets

IMF Bz data GSFC https://omniweb.gsfc.nasa.gov/form/sc_merge_min1.html

AE index WDC http://wdc.kugi.kyoto-u.ac.jp/dstae/index.html

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Short summary

Cross-wavelet and classical cross-correlation analyses were used in order to study solar-wind–magnetosphere coupling during HILDCAAs. Cross-correlation analyses results show that the coupling between the solar wind and the magnetosphere during HILDCAAs occurs mainly in the period ≤ 8 h. Classical correlation analysis indicates that the correlation between IMF B_z and AE may be classified as moderate (0.4–0.7) and that more than 80 % of the HILDCAAs exhibit a lag of 20–30 min.