1. Trends in the Critical Frequency of the F2 Layer during the Recent Decade

   • A. D. Danilov
   • N. A. Berbeneva

   OriginalPaper 22 May 2023 Pages: 113 - 120

   

2. Dependence of NmF2 Local Annual Asymmetry Index on Local Time and Solar Activity

   • M. G. Deminov
   • G. F. Deminova

   OriginalPaper 22 May 2023 Pages: 121 - 126

   

3. Influence of Path Illumination on the Amplitude Characteristics of VLF Signals

   • E. N. Kozakova
   • I. A. Ryakhovsky
   • N. S. Achkasov

   OriginalPaper 22 May 2023 Pages: 127 - 135

   

4. Features of the Behavior of SE-Type Emission during a Substorm

   • N. A. Kurazhkovskaya
   • B. I. Klain

   OriginalPaper 22 May 2023 Pages: 136 - 145

   

5. Manifestation of Magnetic Flux Ropes in the Structure of Solar Prominences

   • B. P. Filippov

   OriginalPaper 22 May 2023 Pages: 146 - 152

   

6. Fine Structures of Type-IV Solar Radio Bursts Associated with Stationary and Moving Sources

   • V. V. Fomichev
   • G. P. Chernov

   OriginalPaper 22 May 2023 Pages: 153 - 160

   

7. Comparison of the Efficiency of Machine Learning Methods in Studying the Importance of Input Features in the Problem of Forecasting the Dst Geomagnetic Index

   • R. D. Vladimirov
   • V. R. Shirokiy
   • S. A. Dolenko

   OriginalPaper 22 May 2023 Pages: 161 - 171

   

8. Global Ionospheric Response to Intense Variations of Solar and Geomagnetic Activity According to the Data of the GNSS Global Networks of Navigation Receivers

   • M. S. Pulinets
   • P. A. Budnikov
   • S. A. Pulinets

   OriginalPaper 22 May 2023 Pages: 172 - 185

   

9. Wave Perturbations of the Lower and Upper Ionosphere during the 2019 Faxai Tropical Typhoon

   • S. L. Shalimov
   • V. I. Zakharov
   • G. M. Korkina

   OriginalPaper 22 May 2023 Pages: 186 - 196

   

10. Evaluating the Effectiveness of Using Integral Daily Es Characteristics to Identify Short-Term Ionospheric Precursors of Strong Earthquakes

    • L. P. Korsunova
    • V. V. Khegai

    OriginalPaper 22 May 2023 Pages: 197 - 206

    

11. Equatorial Plasma Bubble Occurrence Probability with Respect to Month of Year

    • L. N. Sidorova

    OriginalPaper 22 May 2023 Pages: 207 - 214

    

12. Predicting the Functional Dependence of the Sunspot Number in the Solar Activity Cycle Based on Elman Artificial Neural Network

    • I. V. Krasheninnikov
    • S. O. Chumakov

    OriginalPaper 22 May 2023 Pages: 215 - 223

    

13. Comparison of the Properties of a Statistical Functional from Measurements of the Magnetic Field in the Middle of the Russian Continental Platform and in a Seismically Active Region

    • A. E. Volvach
    • L. P. Kogan
    • L. N. Volvach

    DISCUSSION SECTION 22 May 2023 Pages: 224 - 238