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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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ANGEO | Articles | Volume 36, issue 1
Ann. Geophys., 36, 139–147, 2018
https://doi.org/10.5194/angeo-36-139-2018
© 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...

Ann. Geophys., 36, 139–147, 2018
https://doi.org/10.5194/angeo-36-139-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 25 Jan 2018

Regular paper | 25 Jan 2018

Latitude-dependent delay in the responses of the equatorial electrojet and Sq currents to X-class solar flares

Paulo A. B. Nogueira et al.
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Short summary
We have analyzed the low-latitude ionospheric responses to solar flares. In particular we show for the first time that 5 to 8 min of time delay is present in the peak effect in the EEJ, with respect that of Sq current outside the magnetic equator, in response to the flare radiation enhancement. We propose that the flare induced enhancement in neutral wind occurring with a time delay could be responsible for a delayed zonal electric field disturbance driving the EEJ.
We have analyzed the low-latitude ionospheric responses to solar flares. In particular we show...
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