<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">Dear Colleagues,</span></div><p class="MsoNormal" style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> </span></p><div style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">Please consider submitting an abstract to our session (D4) on “</span><span lang="EN" style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">Advances in Mid, Low Latitude and Equatorial Aeronomy”</span><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> at upcoming IAGA-IASPEI meeting during 22-27 August 2021, which will be fully on a virtual platform. </span></div><div style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><b class=""><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">The abstract submission deadline is 15<sup class="">th</sup> April 2021.</span></b><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> More information can be found at </span><span style="font-size: 12pt; font-family: "Times New Roman", serif; color: rgb(0, 90, 149); background-position: initial initial; background-repeat: initial initial;" class=""><a href="http://www.iaga-iaspei-india2021.in/" target="_blank" style="color: blue;" class=""><span style="color: rgb(0, 90, 149); text-decoration-line: none;" class="">http://www.iaga-iaspei-india2021.in</span></a></span><span style="text-align: start;" class="">.</span><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> <a href="https://egu21.eu/about/provisional_format_of_egu21.html" target="_blank" style="color: blue;" class=""></a> </span></div><p class="MsoNormal" style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> </span></p><div style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><b class=""><span lang="EN-US" style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">Description:</span></b><span lang="EN-US" style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> Ionospheric electrodynamics at equatorial and low latitudes is controlled by the forcing from the lower atmosphere including the effects of SSW, tidal, planetary, and gravity waves; and by the forcing from the magnetosphere through penetration of disturbed time electric fields and neutral winds. The session focuses on the behavior of ionospheric phenomena occurring at equatorial to low latitudes including equatorial ionization anomaly, plasma irregularities, plasma bubbles and blobs, F3-layer, pre-reversal enhancement, etc., with the particular emphasis on the electric fields and current systems associated with solar quiet (Sq) and equatorial electrojet. Recent multi-instrument and multi-site observations, as well as, theoretical and simulation studies have advanced our understanding of these phenomena. Although this has substantially improved our current understanding of the ionospheric electrodynamics during quiet and disturbed periods, solar eclipse, solar flare, and sudden stratospheric warming events, there are still some outstanding questions and challenges, which need to be addressed. Presentations are solicited that focus on the physical understanding of these processes through observations and numerical simulation modeling, and unresolved problems therein.</span><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""></span></div><p class="MsoNormal" style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class=""> </span></p><div style="margin: 0in 0in 0.0001pt; text-align: justify; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">Best regards,</span></div><p class="MsoNormal" style="text-align: justify; line-height: normal; margin: 0in 0in 8pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-family: "Times New Roman", serif; font-size: 16px;" class="">Geeta Vichare,</span><span style="font-family: "Times New Roman", serif; font-size: 16px;" class=""> </span><span style="font-size: 12pt; font-family: "Times New Roman", serif;" class="">Paulo Fagundes, Venkatesh K., Michael Pezzopane, Y. Yamazaki</span><span style="font-size: 12pt; font-family: "Times New Roman", serif; color: rgb(51, 51, 51); background-position: initial initial; background-repeat: initial initial;" class=""><span style="text-align: start;" class=""> (conveners)</span></span></p></body></html>