O. Saka

1.1k total citations
70 papers, 937 citations indexed

About

O. Saka is a scholar working on Astronomy and Astrophysics, Geophysics and Molecular Biology. According to data from OpenAlex, O. Saka has authored 70 papers receiving a total of 937 indexed citations (citations by other indexed papers that have themselves been cited), including 64 papers in Astronomy and Astrophysics, 38 papers in Geophysics and 36 papers in Molecular Biology. Recurrent topics in O. Saka's work include Ionosphere and magnetosphere dynamics (63 papers), Solar and Space Plasma Dynamics (39 papers) and Earthquake Detection and Analysis (37 papers). O. Saka is often cited by papers focused on Ionosphere and magnetosphere dynamics (63 papers), Solar and Space Plasma Dynamics (39 papers) and Earthquake Detection and Analysis (37 papers). O. Saka collaborates with scholars based in Japan, United States and Canada. O. Saka's co-authors include Teitaro KITAMURA, K. Schlegel, H. Lühr, Takashi Kikuchi, K. Hayashi, T. Oguti, H. Tachihara, D. N. Baker, S. Kokubun and Takashi Watanabe and has published in prestigious journals such as Physical Review Letters, Journal of Geophysical Research Atmospheres and Geophysical Research Letters.

In The Last Decade

O. Saka

65 papers receiving 803 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
O. Saka Japan 16 906 581 434 75 42 70 937
D. K. Milling United Kingdom 17 1.3k 1.4× 658 1.1× 593 1.4× 84 1.1× 83 2.0× 25 1.3k
T. Bösinger Finland 20 1.0k 1.1× 614 1.1× 512 1.2× 66 0.9× 31 0.7× 56 1.1k
F. J. Rich United States 18 893 1.0× 301 0.5× 492 1.1× 120 1.6× 55 1.3× 30 911
T. Moretto United States 19 963 1.1× 286 0.5× 623 1.4× 95 1.3× 30 0.7× 54 1.0k
Akira Morioka Japan 14 795 0.9× 333 0.6× 190 0.4× 69 0.9× 50 1.2× 54 819
Takesi Iijima Japan 10 1.3k 1.5× 488 0.8× 833 1.9× 49 0.7× 50 1.2× 13 1.3k
N. J. Fox United States 11 1.3k 1.5× 576 1.0× 346 0.8× 92 1.2× 75 1.8× 28 1.3k
J. Tu United States 16 763 0.8× 257 0.4× 251 0.6× 97 1.3× 30 0.7× 45 773
J. L. Green United States 13 798 0.9× 231 0.4× 295 0.7× 88 1.2× 38 0.9× 21 811
P. F. Bythrow United States 20 1.4k 1.6× 341 0.6× 941 2.2× 74 1.0× 65 1.5× 33 1.5k

Countries citing papers authored by O. Saka

Since Specialization
Citations

This map shows the geographic impact of O. Saka'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 O. Saka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites O. Saka more than expected).

Fields of papers citing papers by O. Saka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by O. Saka. 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 O. Saka. The network helps show where O. Saka may publish in the future.

Co-authorship network of co-authors of O. Saka

This figure shows the co-authorship network connecting the top 25 collaborators of O. Saka. A scholar is included among the top collaborators of O. Saka 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 O. Saka. O. Saka 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.
Saka, O.. (2021). Ionospheric control of space weather. Annales Geophysicae. 39(3). 455–460. 1 indexed citations
2.
Saka, O.. (2021). Are drivers of northern lights in the ionosphere?. 1 indexed citations
3.
Saka, O.. (2020). The increase in the curvature radius of geomagnetic field lines preceding a classical dipolarization. Annales Geophysicae. 38(2). 467–479. 2 indexed citations
4.
Saka, O.. (2019). A new scenario applying traffic flow analogy to poleward expansion of auroras. Annales Geophysicae. 37(3). 381–387. 2 indexed citations
5.
Saka, O., K. Hayashi, & D. Koga. (2012). Periodic aurora surge propagating eastward/westward at poleward boundary of aurora zone during the first 10min intervals of Pi2 onset. Journal of Atmospheric and Solar-Terrestrial Physics. 80. 285–295. 8 indexed citations
6.
Saka, O., D. Koga, & K. Hayashi. (2007). A plasma bulk motion in the midnight magnetosphere during auroral breakup inferred from all-sky image and magnetic field observations at geosynchronous altitudes. Journal of Atmospheric and Solar-Terrestrial Physics. 69(9). 1063–1074. 5 indexed citations
7.
Saka, O.. (2005). Plasma flow characteristics in converging field line geometry in anisotropic plasmas. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 19. 80–83. 1 indexed citations
8.
Saka, O., H. Tachihara, M. Shinohara, et al.. (2000). Simultaneous transients in the auroral zone and the equator as observed with SuperDARN and magnetometers: A correlation with equatorial counter electrojet (CEJ) event. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 14. 45–54. 1 indexed citations
9.
Saka, O., et al.. (1999). A slow mode wave as a possible source of Pi 2 and associated particle precipitation: a case study. Annales Geophysicae. 17(5). 674–674. 1 indexed citations
10.
11.
Saka, O., Osamu Watanabe, & D. N. Baker. (1996). A possible driving source for transient field line oscillations in the postmidnight sector at geosynchronous altitudes. Journal of Geophysical Research Atmospheres. 101(A11). 24719–24726. 15 indexed citations
12.
Itonaga, M., Teitaro KITAMURA, O. Saka, et al.. (1992). Discrete Spectral Structure of Low-Latitude and Equatorial Pi2 Pulsation.. Journal of geomagnetism and geoelectricity. 44(3). 253–259. 19 indexed citations
13.
Yamamoto, Takumi, K. Hayashi, S. Kokubun, et al.. (1988). Auroral activities and long-period geomagnetic pulsations: 2. Ps5 pulsations following auroral breakup in the premidnight hours.. Journal of geomagnetism and geoelectricity. 40(5). 571–582. 3 indexed citations
14.
Oguti, T., T. Yamamoto, K. Hayashi, et al.. (1988). Fast auroral evolution and related magnetic field changes on the ground and at conjugate satellites.. Journal of geomagnetism and geoelectricity. 40(5). 505–536. 6 indexed citations
15.
Yamamoto, T., K. Hayashi, S. Kokubun, et al.. (1988). Auroral activities and long-period geomagnetic pulsations: 1. Pc5 pulsations and concurrent auroras in the dawn sector.. Journal of geomagnetism and geoelectricity. 40(5). 553–569. 15 indexed citations
16.
Saka, O. & H. Tachihara. (1986). A Compact Magnetometer Data Acquisition System with Accurate Chronometer. Journal of geomagnetism and geoelectricity. 38(3). 221–230. 13 indexed citations
17.
Saka, O., M. Itonaga, & Teitaro KITAMURA. (1982). Ionospheric control of polarization of low-latitude geomagnetic micropulsations at sunrise. Journal of Atmospheric and Terrestrial Physics. 44(8). 703–712. 26 indexed citations
18.
Itonaga, M., et al.. (1981). Effects of the Sunrise on Polarization Characteristics of Low-Latitude Pc3-4 Band Micropulsations. Memoirs of National Institute of Polar Research. Special issue. 18. 152–160. 1 indexed citations
19.
Saka, O., et al.. (1981). Polarization Study of Pc1 and Pc1-2 Band Pulsations at Conjugate Stations. Memoirs of National Institute of Polar Research. Special issue. 18(18). 118–126. 2 indexed citations
20.
Oguti, T., S. Kokubun, K. Hayashi, et al.. (1981). Statistics of pulsating auroras on the basis of all-sky TV data from five stations. I. Occurrence frequency. Canadian Journal of Physics. 59(8). 1150–1157. 32 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.

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