G. J. Sofko

5.3k total citations · 2 hit papers
153 papers, 4.2k citations indexed

About

G. J. Sofko is a scholar working on Astronomy and Astrophysics, Molecular Biology and Geophysics. According to data from OpenAlex, G. J. Sofko has authored 153 papers receiving a total of 4.2k indexed citations (citations by other indexed papers that have themselves been cited), including 139 papers in Astronomy and Astrophysics, 49 papers in Molecular Biology and 48 papers in Geophysics. Recurrent topics in G. J. Sofko's work include Ionosphere and magnetosphere dynamics (139 papers), Solar and Space Plasma Dynamics (82 papers) and Geomagnetism and Paleomagnetism Studies (49 papers). G. J. Sofko is often cited by papers focused on Ionosphere and magnetosphere dynamics (139 papers), Solar and Space Plasma Dynamics (82 papers) and Geomagnetism and Paleomagnetism Studies (49 papers). G. J. Sofko collaborates with scholars based in Canada, United States and United Kingdom. G. J. Sofko's co-authors include R. A. Greenwald, J. A. Koehler, J. P. Villain, M. Pinnock, W. A. Bristow, Natsuo Sato, A. D. M. Walker, G. Chisham, J. M. Ruohoniemi and T. K. Yeoman and has published in prestigious journals such as Nature, Journal of Geophysical Research Atmospheres and Remote Sensing of Environment.

In The Last Decade

G. J. Sofko

146 papers receiving 3.7k citations

Hit Papers

DARN/SuperDARN 1995 2026 2005 2015 1995 2007 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. DARN/SuperDARN
    1995 945 citations R. A. Greenwald, M. Pinnock et al. profile →
  2. A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions
    2007 586 citations G. Chisham, M. Lester et al. profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author Last Decade Papers Cites
G. J. Sofko 3.9k 1.5k 1.5k 1.3k 405 153 4.2k
D. L. Hysell 3.7k 0.9× 1.7k 1.1× 1.4k 1.0× 619 0.5× 630 1.6× 181 3.9k
J. Moen 5.6k 1.5× 1.8k 1.2× 1.7k 1.1× 2.3k 1.7× 390 1.0× 200 6.0k
Roland T. Tsunoda 5.4k 1.4× 2.2k 1.5× 2.1k 1.4× 971 0.7× 681 1.7× 131 5.5k
C. E. Valladares 4.3k 1.1× 2.0k 1.3× 1.7k 1.1× 1.0k 0.8× 787 1.9× 116 4.5k
M. J. Nicolls 3.2k 0.8× 1.0k 0.7× 1.4k 1.0× 753 0.6× 348 0.9× 132 3.4k
A. Brekke 2.9k 0.8× 491 0.3× 1.3k 0.9× 962 0.7× 289 0.7× 139 3.1k
T. K. Yeoman 5.6k 1.4× 1.4k 0.9× 2.3k 1.6× 2.3k 1.7× 396 1.0× 254 5.7k
N. Jakowski 4.6k 1.2× 3.3k 2.2× 2.2k 1.5× 885 0.7× 1.5k 3.6× 254 5.1k
J. A. Koehler 1.6k 0.4× 696 0.5× 692 0.5× 398 0.3× 180 0.4× 78 1.8k
S. E. Milan 8.9k 2.3× 1.4k 1.0× 2.3k 1.6× 4.8k 3.5× 418 1.0× 330 9.0k

Countries citing papers authored by G. J. Sofko

Since Specialization
Citations

This map shows the geographic impact of G. J. Sofko's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by G. J. Sofko with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G. J. Sofko more than expected).

Fields of papers citing papers by G. J. Sofko

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by G. J. Sofko. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by G. J. Sofko. The network helps show where G. J. Sofko may publish in the future.

Co-authorship network of co-authors of G. J. Sofko

This figure shows the co-authorship network connecting the top 25 collaborators of G. J. Sofko. A scholar is included among the top collaborators of G. J. Sofko based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with G. J. Sofko. G. J. Sofko is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Walker, A. D. M. & G. J. Sofko. (2016). Mapping of steady-state electric fields and convective drifts in geomagnetic fields – Part 1: Elementary models. Annales Geophysicae. 34(1). 55–65. 4 indexed citations
2.
Watanabe, Masakazu & G. J. Sofko. (2009). Dayside four‐sheet field‐aligned current system during IMF BY‐dominated periods. Journal of Geophysical Research Atmospheres. 114(A3). 7 indexed citations
3.
Chisham, G., M. P. Freeman, Gary Abel, et al.. (2008). Remote sensing of the spatial and temporal structure of magnetopause and magnetotail reconnection from the ionosphere. Reviews of Geophysics. 46(1). 37 indexed citations
4.
Liang, Jun, G. J. Sofko, & E. Donovan. (2004). On the spatial and temporal relationship between auroral intensification and flow enhancement in a pseudosubstorm event. Journal of Geophysical Research Atmospheres. 109(A6). 6 indexed citations
5.
Prikryl, Paul, D. B. Muldrew, & G. J. Sofko. (2003). High-speed solar wind, auroral electrojets and atmospheric gravity waves: a link to the Earth's atmosphere. ESASP. 535. 371–376. 8 indexed citations
6.
Milan, S. E., M. Lester, S. W. H. Cowley, et al.. (2003). Variations in the polar cap area during two substorm cycles. HAL (Le Centre pour la Communication Scientifique Directe). 1 indexed citations
7.
Rae, I. J., S. W. H. Cowley, B. Lavraud, et al.. (2002). Cluster Plasma And Magnetic Field Measurements Of Flux Transfer Events In Conjunction With Their Ionospheric Flow Signatures. EGSGA. 5002. 1 indexed citations
8.
Koustov, A. V., G. J. Sofko, Daniel André, D. W. Danskin, & L. Benkevitch. (2002). Seasonal Variation of F-region Echo Occurrence in the Midnight Sector. AGU Fall Meeting Abstracts. 2002. 1 indexed citations
9.
Sofko, G. J., et al.. (2002). Multi-frequency Measurements of Hf Doppler Velocity In The Auroral E Region. EGS General Assembly Conference Abstracts. 1468. 2 indexed citations
10.
Rae, I. J., M. G. G. T. Taylor, B. Lavraud, et al.. (2001). First CLUSTER plasma and magnetic field measurements of flux transfer events in conjunction with their ionospheric flow signatures. AGU Fall Meeting Abstracts. 2001.
11.
Prikryl, Paul, et al.. (2001). Upper-Atmospheric Gravity Waves and Tropospheric Clouds. AGUFM. 2001. 1 indexed citations
12.
Huang, Chao‐Song, et al.. (2000). Super Dual Auroral Radar Network observations of ionospheric multicell convection during northward interplanetary magnetic field. Journal of Geophysical Research Atmospheres. 105(A4). 7419–7428. 17 indexed citations
13.
MacDougall, J. W., et al.. (2000). Travelling ionospheric disturbance properties deduced from Super Dual Auroral Radar measurements. Annales Geophysicae. 18(12). 1550–1559. 21 indexed citations
14.
Chang, S.‐W., J. D. Scudder, J. B. Sigwarth, et al.. (1998). A comparison of a model for the theta aurora with observations from Polar, Wind, and SuperDARN. Journal of Geophysical Research Atmospheres. 103(A8). 17367–17390. 58 indexed citations
15.
Koehler, J. A., et al.. (1995). Type-III echoes of radar aurora: observational aspects.. 13(1). 2–9. 1 indexed citations
16.
17.
18.
Sofko, G. J., R. A. Greenwald, & W. A. Bristow. (1995). Direct determination of large‐scale magnetospheric field‐aligned currents with SuperDARN. Geophysical Research Letters. 22(15). 2041–2044. 63 indexed citations
19.
McDiarmid, D. R., et al.. (1989). Are type III radio aurorae directly excited by electrostatic ion cyclotron waves?. Journal of Geophysical Research Atmospheres. 94(A10). 13479–13488. 7 indexed citations
20.
Haldoupis, C., et al.. (1987). High Resolution Doppler Spectrum Measurements of 3-meter Auroral Irregularities at Large Magnetic Aspect Angles. Physica Scripta. 35(6). 910–916. 7 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by D. L. Hysell Breakdown of academic impact, for papers by J. Moen Breakdown of academic impact, for papers by Roland T. Tsunoda Breakdown of academic impact, for papers by C. E. Valladares Breakdown of academic impact, for papers by M. J. Nicolls Breakdown of academic impact, for papers by A. Brekke Breakdown of academic impact, for papers by T. K. Yeoman Breakdown of academic impact, for papers by N. Jakowski Breakdown of academic impact, for papers by J. A. Koehler Breakdown of academic impact, for papers by S. E. Milan
Rankless by CCL
2026