Articles | Volume 36, issue 1
https://doi.org/10.5194/angeo-36-139-2018
https://doi.org/10.5194/angeo-36-139-2018
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, Mangalathayil A. Abdu, Jonas R. Souza, Clezio M. Denardini, Paulo F. Barbosa Neto, João P. Serra de Souza da Costa, and Ana P. M. Silva

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Latest update: 13 Jul 2024
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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.