1. New Vacuum Solar Telescope Fringe Removal Based on “Fringes Flat Field”

   • Dejian Liu
   • Sheng Zheng
   • Yongyuan Xiang

   OriginalPaper 29 January 2021 Article: 28

   

2. Properties of High-Frequency Type II Radio Bursts and Their Relation to the Associated Coronal Mass Ejections

   • A. C. Umuhire
   • N. Gopalswamy
   • P. Mäkelä

   OriginalPaper 29 January 2021 Article: 27

   

3. Magnetic Reconnections in the Presence of Three-Dimensional Magnetic Nulls and Quasi-Separatrix Layers

   • Sanjay Kumar
   • Sushree S. Nayak
   • Ramit Bhattacharyya

   OriginalPaper 29 January 2021 Article: 26

   

4. Measurements of Solar Differential Rotation Using the Century Long Kodaikanal Sunspot Data

   • Bibhuti Kumar Jha
   • Aditya Priyadarshi
   • Dipankar Banerjee

   OriginalPaper 28 January 2021 Article: 25

   

5. On the Correlation between Energy Spectra and Element Abundances in Solar Energetic Particles

   • Donald V. Reames

   OriginalPaper Open access 28 January 2021 Article: 24

   

6. Nonlinear Analysis of Radial Evolution of Solar Wind in the Inner Heliosphere

   • K. Kiran
   • K. C. Ajithprasad
   • K. P. Harikrishnan

   OriginalPaper 28 January 2021 Article: 23

   

7. Population of Bright Plume Threads in Solar Polar Coronal Holes

   • Zhenghua Huang
   • Quanhao Zhang
   • Bo Li

   OriginalPaper 28 January 2021 Article: 22

   

8. On the Prediction of Solar Cycles

   • V. Courtillot
   • F. Lopes
   • J. L. Le Mouël

   OriginalPaper Open access 25 January 2021 Article: 21

   

9. Role of Compressive Viscosity and Thermal Conductivity on the Damping of Slow Waves in Coronal Loops with and Without Heating–Cooling Imbalance

   • Abhinav Prasad
   • A. K. Srivastava
   • T. J. Wang

   OriginalPaper 19 January 2021 Article: 20

   

10. Comparison of Geomagnetic Indices During Even and Odd Solar Cycles SC17 – SC24: Signatures of Gnevyshev Gap in Geomagnetic Activity

    • Jouni Takalo

    OriginalPaper Open access 18 January 2021 Article: 19

    

11. Statistical Approach on Differential Emission Measure of Coronal Holes using the CATCH Catalog

    • Stephan G. Heinemann
    • Jonas Saqri
    • Manuela Temmer

    OriginalPaper Open access 18 January 2021 Article: 18

    

12. Automated Detection of Chromospheric Swirls Based on Their Morphological Characteristics

    • Ioannis Dakanalis
    • Georgia Tsiropoula
    • Konstantinos Koutroumbas

    OriginalPaper 14 January 2021 Article: 17

    

13. Statistical and Solar Cycle Distribution of Daily Flux \(\ge 10^{9}\mbox{ cm}^{-2}\) d⁻¹ sr⁻¹ for \(E>2\) MeV Electrons Observed by GOES During 1987 – 2019

    • Gui-Ming Le
    • Yi-Ning Zhang
    • Ming-Xian Zhao

    OriginalPaper 12 January 2021 Article: 16

    

14. The Balloon-Borne Investigation of Temperature and Speed of Electrons in the Corona (BITSE): Mission Description and Preliminary Results

    • N. Gopalswamy
    • J. Newmark
    • E.-K. Lim

    OriginalPaper Open access 12 January 2021 Article: 15

    

15. Editorial Appreciation

    • John Leibacher
    • Cristina H. Mandrini
    • Michael S. Wheatland

    EditorialNotes 12 January 2021 Article: 14

16. Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated Active-Day Fraction (ADF) Sunspot Group Series

    • Ilya Usoskin
    • Gennady Kovaltsov
    • Wilma Kiviaho

    OriginalPaper 11 January 2021 Article: 13

    

17. Propagating Conditions and the Time of ICME Arrival: A Comparison of the Effective Acceleration Model with ENLIL and DBEM Models

    • Evangelos Paouris
    • Jaša Čalogović
    • Georgios Balasis

    OriginalPaper 07 January 2021 Article: 12

    

18. VLA Measurements of Faraday Rotation Through a Coronal Mass Ejection Using Multiple Lines of Sight

    • Jason E. Kooi
    • Madison L. Ascione
    • Mohammad Ashas

    OriginalPaper 06 January 2021 Article: 11

    

19. Simulating the Coronal Evolution of Bipolar Active Regions to Investigate the Formation of Flux Ropes

    • S. L. Yardley
    • D. H. Mackay
    • L. M. Green

    OriginalPaper Open access 06 January 2021 Article: 10

    

20. Properties of Type III and Type IIIb Bursts in the Frequency Band of 8 – 80 MHz During PSP Perihelion at the Beginning of April 2019

    • V. N. Melnik
    • A. I. Brazhenko
    • I. M. Bubnov

    OriginalPaper 06 January 2021 Article: 9

    

21. The Fine Structure of the Quasi-Biennial Oscillations of Sunspot Areas and the Double Magnetic Cycle of the Sun

    • Irina Kostyuchenko
    • Elena Bruevich

    OriginalPaper 06 January 2021 Article: 8

    

22. Non-Neutralized Electric Current of Active Regions Explained as a Projection Effect

    • Xudong Sun
    • Mark C. M. Cheung

    Editors’ Choice 06 January 2021 Article: 7

    

23. Forecasting of Sunspot Time Series Using a Hybridization of ARIMA, ETS and SVM Methods

    • Sibarama Panigrahi
    • Radha Mohan Pattanayak
    • Santi Kumari Behera

    OriginalPaper 05 January 2021 Article: 6

    

24. On the Reflection of Torsional Alfvén Waves from the Solar Transition Region

    • Yuriy Tsap
    • Yulia Kopylova

    OriginalPaper 05 January 2021 Article: 5

    

25. Sunspot Positions and Areas from Observations by Cigoli, Galilei, Cologna, Scheiner, and Colonna in 1612 – 1614

    • Mikhail Vokhmyanin
    • Rainer Arlt
    • Nadezhda Zolotova

    OriginalPaper 05 January 2021 Article: 4

    

26. The Sunspot Drawing Collection of the National Solar Observatory at Sacramento Peak (1947–2004)

    • V. M. S. Carrasco
    • A. A. Pevtsov
    • J. M. Vaquero

    OriginalPaper 05 January 2021 Article: 3

    

27. Solar-Cycle Characteristics in Kodaikanal Sunspot Area: North–South Asymmetry, Phase Distribution and Gnevyshev Gap

    • B. Ravindra
    • Partha Chowdhury
    • J. Javaraiah

    OriginalPaper 05 January 2021 Article: 2

    

28. Solar Type U Burst Associated with a High Coronal Loop

    • Vladimir Dorovskyy
    • Valentin Melnik
    • Igor Bubnov

    OriginalPaper 30 December 2020 Article: 1