Faculty Profiles - OYAMA, Shin-ichiro

Papers - OYAMA, Shin-ichiro

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Observations of fragmented aurora-like emissions and picket fence on the poleward edge of the auroral oval Open Access

Nanjo, S; Herlingshaw, K; Sergienko, T; Cessateur, G; Partamies, N; Johnsen, M; Hosokawa, K; Lamy, H; Ogawa, Y; Kero, A; Oyama, SI; Yamauchi, M

ANNALES GEOPHYSICAE Vol. 44 ( 1 ) page： 63 - 84 2026.2

Ionosphere-Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm Open Access

Cai, L; Aikio, A; Geethakumari, GP; Vanhamäki, H; Virtanen, II; Oyama, S; Zhang, YL; Zhang, JJ; Hairston, M

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 131 ( 2 ) 2026.2

Electron-driven variability of the upper-atmospheric nitric oxide column density over the Syowa station in Antarctica Open Access

Verronen, P; Mizuno, A; Miyoshi, Y; Kumar, S; Nakajima, T; Oyama, SI; Nagahama, T; Nozawa, S; Szelag, M; Häkkilä, T; Kalakoski, N; Kero, A; Turunen, E; Kasahara, S; Yokota, S; Keika, K; Hori, T; Mitani, T; Takashima, T; Shinohara, I

ANNALES GEOPHYSICAE Vol. 43 ( 2 ) page： 561 - 578 2025.10

Geomagnetic Activity Dependence of the Auroral Electron Precipitation Spectrum at High Latitudes Open Access

Oyama, S; Virtanen, II; Tesfaw, HW; Raita, T; Holappa, L; Miyoshi, Y; Cai, L; Vanhamäki, H; Aikio, AT; Ogawa, Y; Hosokawa, K

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 130 ( 9 ) 2025.9

Multi-Event Analysis of STEVE, SAR Arc, and Red/Green Arc at Subauroral Latitudes Using Data From Ground Optical and Radio Instruments and the Arase and Van Allen Probes Satellites Open Access

Sugimura, R; Shiokawa, K; Otsuka, Y; Oyama, S; Oksanen, A; Connors, M; Kadokura, A; Poddelsky, I; Nishitani, N; Shepherd, SG; Ruohoniemi, JM; Smith, C; Spence, H; Reeves, G; Funsten, HO; Miyoshi, Y; Shinohara, I; Kasahara, Y; Tsuchiya, F; Kumamoto, A; Shinbori, A; Asamura, K; Yokota, S; Kazama, Y; Jun, CW; Wang, SY; Tam, SWY; Chang, TF; Wang, BJ; Kasahara, S; Keika, K; Hori, T; Matsuoka, A

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 130 ( 2 ) 2025.2

Total Electron Content Variations During an HSS/SIR-Driven Geomagnetic Storm at High and Mid Latitudes Open Access

Geethakumari, GP; Aikio, AT; Cai, L; Vanhamäki, H; Virtanen, II; Coster, A; Marchaudon, A; Blelly, PL; Maute, A; Norberg, J; Oyama, S; Zhang, Y; Kunduri, BSR

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 12 ) 2024.12

EISCAT Observations of Depleted High-Latitude <i>F</i>-Region During an HSS/SIR-Driven Magnetic Storm Open Access

Ellahouny, NM; Aikio, AT; Vanhamäki, H; Virtanen, II; Cai, L; Marchaudon, A; Blelly, PL; Coster, A; Norberg, J; Maute, A; Oyama, S

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 9 ) 2024.9

Development and Evaluation of a Comprehensive Machine Learning Tool Differentiating Idiopathic Pulmonary Fibrosis from Other Interstitial Lung Diseases in the Japanese nationwide registry (PROMISE study)

Furukawa, T; Kondoh, Y; Oyama, S; Yokota, H; Teramachi, R; Hozumi, H; Shiratori, Y; Hasegawa, Y; Suda, T; Ishii, M

EUROPEAN RESPIRATORY JOURNAL Vol. 64 2024.9

Observational Evidence for Three Time-Scale Modulations in the Pulsating Aurora Open Access

Chen, R; Miyoshi, Y; Gao, XL; Lu, QM; Tsurutani, BT; Hosokawa, K; Hori, T; Ogawa, Y; Oyama, SI; Kasahara, Y; Matsuda, S; Nakamura, S; Matsuoka, A; Shinohara, I

GEOPHYSICAL RESEARCH LETTERS Vol. 51 ( 16 ) 2024.8

Effect of Polar Cap Patches on the High-Latitude Upper Thermospheric Winds Open Access

Cai, L; Aikio, A; Oyama, S; Ivchenko, N; Vanhamäki, H; Virtanen, I; Buchert, S; Mekuriaw, ML; Zhang, Y

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 8 ) 2024.7

Spatiotemporal Development of Cosmic Noise Absorption at Subauroral Latitudes Using Multipoint Ground-Based Riometers Open Access

Kato, Y; Shiokawa, K; Tanaka, Y; Ozaki, M; Kadokura, A; Oyama, S; Oinats, A; Connors, M; Baishev, D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 7 ) 2024.7

On the Factors Controlling the Relationship Between Type of Pulsating Aurora and Energy of Pulsating Auroral Electrons: Simultaneous Observations by Arase Satellite, Ground-Based All-Sky Imagers and EISCAT Radar Open Access

Ito, Y; Hosokawa, K; Ogawa, Y; Miyoshi, Y; Tsuchiya, F; Fukizawa, M; Kasaba, Y; Kazama, Y; Oyama, S; Murase, K; Nakamura, S; Kasahara, Y; Matsuda, S; Kasahara, S; Hori, T; Yokota, S; Keika, K; Matsuoka, A; Teramoto, M; Shinohara, I

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 7 ) 2024.7

Occurrence of Mesospheric Frontal Structures Over the High Latitude Station, Tromsø, Norway Open Access

Chauhan, N; Shiokawa, K; Gurubaran, S; Nozawa, S; Oyama, SI; Nakamura, T

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 7 ) 2024.7

Westward Excursion of Pc1/EMIC Waves and Their Source Protons: Paradoxical Observations From Ground and Space Open Access

Yin, ZF; Zhou, XZ; Hu, ZJ; Yue, C; Zong, QG; Liu, ZY; Liu, JJ; Shiokawa, K; Oyama, SI; Baishev, D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 5 ) 2024.5

Statistical Analysis of Low-Latitude Boundary of Polar-Type Medium-Scale Traveling Ionospheric Disturbances Observed by a 630-nm Airglow Imager at Nyrölä, Finland Open Access

Sato, M; Shiokawa, K; Oyama, S; Otsuka, Y; Shinbori, A; Oksanen, A

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 4 ) 2024.4

Thermospheric Wind Response to March 2023 Storm: Largest Wind Ever Observed With a Fabry-Perot Interferometer in Tromsø, Norway Since 2009 Open Access

Oyama, S; Vanhamäki, H; Cai, L; Shinbori, A; Hosokawa, K; Sakanoi, T; Shiokawa, K; Aikio, A; Virtanen, II; Ogawa, Y; Miyoshi, Y; Kurita, S; Nishitani, N

SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS Vol. 22 ( 3 ) 2024.2

Longitudinal Development of Cosmic Noise Absorption Based on Multipoint Observations at Subauroral Latitudes During Storm-Time Substorms on 25-28 August 2018 Open Access

Kato, Y; Shiokawa, K; Tanaka, Y; Ozaki, M; Kadokura, A; Oyama, SI; Oinats, A; Connors, M; Baishev, D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 129 ( 1 ) 2024.1

Correspondence of Pi2 Pulsations, Aurora Luminosity, and Plasma Flux Fluctuation Near a Substorm Brightening Aurora: Arase Observations

Chen, L; Shiokawa, K; Miyoshi, Y; Oyama, S; Jun, CW; Ogawa, Y; Hosokawa, K; Kazama, Y; Wang, SY; Tam, SWY; Chang, TF; Wang, BJ; Asamura, K; Kasahara, S; Yokota, S; Hori, T; Keika, K; Kasaba, Y; Kumamoto, A; Tsuchiya, F; Shoji, M; Kasahara, Y; Matsuoka, A; Shinohara, I; Nakamura, S

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 128 ( 10 ) 2023.10

An Implication of Detecting the Internal Modulation in a Pulsating Aurora: A Conjugate Observation by the Arase Satellite and All-Sky Imagers

Nanjo S., Ebukuro S., Nakamura S., Miyoshi Y., Kurita S., Oyama S. -I., Ogawa Y., Keika K., Kasahara Y., Kasahara S., Matsuoka A., Hori T., Yokota S., Matsuda S., Shinohara I., Wang S. -Y., Kazama Y., Jun C. -W., Kitahara M., Hosokawa K.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 128 ( 8 ) 2023.8

A Ground-Based Instrument Suite for Integrated High-Time Resolution Measurements of Pulsating Aurora With Arase

Hosokawa K., Oyama S. -I., Ogawa Y., Miyoshi Y., Kurita S., Teramoto M., Nozawa S., Kawabata T., Kawamura Y., Tanaka Y. -M., Miyaoka H., Kataoka R., Shiokawa K., Brandstrom U., Turunen E., Raita T., Johnsen M. G., Hall C., Hampton D., Ebihara Y., Kasahara Y., Matsuda S., Shinohara I., Fujii R.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Vol. 128 ( 8 ) 2023.8

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Papers - OYAMA, Shin-ichiro