3D tomographic analysis of equatorial plasma bubble using GNSS-TEC data from Indonesian GNSS Network by Ihsan Naufal Muafiry, Prayitno Abadi, Teguh N. Pratama, Dyah R. Martiningrum, Sri Ekawati, Yuandhika G. Wismaya, Febrylian F. Chabibi, Gatot H. Pramono

“…EPBs most commonly occur after sunset during the equinox months, although they can also be observed during other seasons. …”
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E‐CHAIM as a Model of Total Electron Content: Performance and Diagnostics by D. R. Themens, Ben Reid, P. T. Jayachandran, Bion Larson, A. V. Koustov, Sean Elvidge, A. M. McCaffrey, Chris Watson

“…At sub‐auroral latitudes, E‐CHAIM RMS errors range between 1.0 and 7.4 TECU, with greatest errors during the equinoxes at high solar activity. This represents an up to 0.5 TECU improvement over the IRI during summer but worse performance by up to 2.4 TECU during the winter. …”
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Modeling TEC Maps Over China Using Particle Swarm Optimization Neural Networks and Long‐Term Ground‐Based GPS, COSMIC, and Fengyun Data by Shuangshuang Shi, Kefei Zhang, Jiaqi Shi, Andong Hu, Dongsheng Zhao, Zhongchao Shi, Peng Sun, Huajing Wu, Suqin Wu

“…The improvements made by the new model over the BP‐NN and IRI‐2016 models in the equinox, summer, and winter seasons of the solar maximum year (2015) are 4%–20%/20%–36%, 9%–21%/26%–42%, and 6%–22%/21%–43%, respectively, and their corresponding results in the solar minimum year (2019) are 12%–24%/41%–59%, 9%–24%/28%–56%, and 10%–26%/53%–72%. …”
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Global Ionospheric Scintillation Estimation Based on Phase Screen Modeling From One‐Dimensional Satellite Data by Yuhao Zheng, Chao Xiong, Luca Spogli, Rayan Iman, Lucilla Alfonsi

“…Scintillation from our model shows typical seasonal variations, with peaks during equinoxes at both high and low magnetic latitudes. …”
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Distribution Characteristics of the Plasma Irregularities Inside the Mid‐Latitude Ionospheric Trough Based on Swarm In Situ Measurements by Yiwen Liu, Wenhao Xie, Chao Xiong, Ting Ye, Yuhao Wang, Xin Wan, Yueyan Cao

“…(c) The dayside MTI occurrence rate appears highest in winter and lowest in summer, but the nightside MTI occurrence rate appears highest in equinoxes and lowest in winter. (d) The nightside MTI show lower occurrence rate under high solar activity conditions, but no obvious solar activity influence is shown on the dayside. …”
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Statistical Characteristics of Total Electron Content Intensifications on Global Ionospheric Maps by X. Meng, O. P. Verkhoglyadova, S. C. Chapman, N. W. Watkins, M. Cafolla

“…Both the number and strength of TEC intensifications exhibit semi‐annual variation that peaks near equinoxes and dips near solstices, as well as an annual asymmetry with larger values around December solstice compared to June solstice. …”
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Calibration of Swarm Plasma Densities Overestimation Using Neural Networks by Artem Smirnov, Yuri Shprits, Hermann Lühr, Alessio Pignalberi, Chao Xiong

“…During solstices, the crests are more pronounced in the local winter hemispheres, while during equinoxes the crests are weaker and exhibit hemispheric symmetry. …”
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