1. Detection of Strongly Turbulent Regions in the Supercorona with the Venus Express and Mars Express Satellites

   • A. I. Efimov
   • L. A. Lukanina
   • M. Paetzold

   OriginalPaper 22 July 2021 Pages: 293 - 298

   

2. Heliospheric Magnetic Field and The Parker Model

   • N. S. Svirzhevsky
   • G. A. Bazilevskaya
   • Yu. I. Stozhkov

   OriginalPaper 22 July 2021 Pages: 299 - 311

   

3. Solar-Activity Cycles Reconstructed from Statistics on Polar Lights with Allowance for the Contribution of the Main Magnetic Field of the Earth in 1000–2000

   • N. G. Ptitsyna
   • I. M. Demina

   OriginalPaper 22 July 2021 Pages: 312 - 324

   

4. Ionic Foreshock of a Near-Earth Shock Wave: Theoretical Model and Observational Data

   • G. N. Kichigin

   OriginalPaper 22 July 2021 Pages: 325 - 330

   

5. Dynamics of Relativistic Electron Fluxes of the Outer Radiation Belt during Geomagnetic Disturbances of Different Intensity

   • N. A. Vlasova
   • V. V. Kalegaev
   • I. S. Nazarkov

   OriginalPaper 22 July 2021 Pages: 331 - 340

   

6. Ionospheric Precursors of Magnetic Storms. 3. Analysis of Juliusruh Station Data

   • A. V. Konstantinova
   • A. D. Danilov

   OriginalPaper 22 July 2021 Pages: 341 - 348

   

7. Planetary Variations in the Height of the F2-Layer Maximum during Ionospheric Disturbances

   • N. P. Sergeenko
   • A. Kh. Depueva

   OriginalPaper 22 July 2021 Pages: 349 - 358

   

8. Dependence of the Annual Asymmetry in NmF2 on Geomagnetic Latitude and Solar Activity

   • M. G. Deminov
   • V. N. Shubin
   • R. G. Deminov

   OriginalPaper 22 July 2021 Pages: 359 - 364

   

9. Detection of Artificial ULF Signals at Staraya Pustyn Magnetic Station during the FENICS-2019 Experiment

   • A. V. Ryabov
   • V. A. Pilipenko
   • A. N. Shevtsov

   OriginalPaper 22 July 2021 Pages: 365 - 375

   

10. Propagation of Electromagnetic Waves in the Region of High Latitudes at Various States of the Ionosphere at the Frequencies of the RSDN-20 (Alpha) Radionavigation System

    • O. I. Akhmetov
    • I. V. Mingalev
    • Z. V. Suvorova

    OriginalPaper 22 July 2021 Pages: 376 - 388

    

11. Response of Background Optical Emission to Ionospheric Heating by High-Power Radio Emission

    • Yu. K. Legostaeva
    • A. V. Shindin
    • S. M. Grach

    OriginalPaper 22 July 2021 Pages: 389 - 398

    

12. Influence of Factors Distorting the Paleomagnetic Record on the Estimation of the Parameters of Ancient Secular Geomagnetic Variations Based on the Results of Layer-by-Layer Studies of Sedimentary Sections

    • V. E. Pavlov
    • Sh. R. Bogoutdinov
    • O. A. Meshcheryakova

    OriginalPaper 22 July 2021 Pages: 399 - 415

    

13. Comment on “A Statistical Study of the Plasma and Composition Distribution inside Magnetic Clouds: 1998–2011” by J. Huang et al.

    • Yu. I. Yermolaev
    • I. G. Lodkina

    OriginalPaper 22 July 2021 Pages: 416 - 417

14. Latitudinal Dependence of Ionospheric Responses to Some Geomagnetic Storms during Low Solar Activity

    • B. W. Joshua
    • J. O. Adeniyi
    • B. Abdurahim

    OriginalPaper 22 July 2021 Pages: 418 - 437

    

15. Comparative of foF2 Measurements with IRI-2016 Model Predictions for Different Latitudes during Low and High Solar Activity

    • E. Timoçin
    • H. Temuçin

    OriginalPaper 22 July 2021 Pages: 438 - 448

    

16. Identification of Seismogenic Anomalies Induced by 11 April, 2012 Indonesian Earthquake (M = 8.5) at Indian Latitudes Using GPS-TEC and ULF/VLF Measurements

    • Devbrat Pundhir
    • Birbal Singh
    • Sarita Sharma

    OriginalPaper 22 July 2021 Pages: 449 - 463

    

17. The Rate of Ionospheric Total Electron Content Index (ROTI) as a Proxy for Nighttime Ionospheric Irregularity Using Ethiopian Low-Latitude GPS Data

    • T. K. Gogie

    OriginalPaper 22 July 2021 Pages: 464 - 475