Published in ApJ Letter, 2025
Spectral change of ground-based neutrons during Forbush events
Recommended citation: Mitthumsiri, W. et al. (2025). "Ground-based Observations of Temporal Variation of Cosmic Ray Spectrum during Forbush Decreases" ApJL, 986, L7. https://doi.org/10.3847/2041-8213/add7d1
Published in JGR Space Physics, 2025
REPPU (submitted)
Recommended citation: Tanaka et al. (2025). "Roles of plasma sheet flow, plasma sheet dissipation and the M-I coupling in reproducing the substorm with the global simulation" JGR Space Physics. submitted, * http://***
Published in Earth, Planets and Space, 2025
Oct storm citizen science
Recommended citation: Kataoka, R. et al. (2025). "Extended red aurora associated with super substorm igniting the October 10, 2024 magnetic storm as revealed by citizen science" Earth, Planets and Space. 77, 64 https://doi.org/10.1186/s40623-025-02178-w
Published in Geophysical Research Letters, 2025
Elfin-ISS conjunction events (accepted)
Recommended citation: Zhang, X.-J. et al. (2025). "Exploring outer radiation belt losses from the International Space Station" Geophysical Research Letters. *,* https://doi.org/*
Published in JGR Space Physics, 2025
ICME analysis (submitted)
Recommended citation: Bamba et al. (2025). "Multipoint spacecraft measurements of an ICME structure in October 2021: From the solar surface to the inner heliosphere" JGR Space Physics. submitted, * http://***
Published in GRL, 2025
EMIC related deep ionization (accepted)
Recommended citation: Murase, K., R. Kataoka, et al. (2025). "Atmospheric ionization caused by EMIC-wave driven energetic electron precipitation at auroral latitude" Space Weather. accepted, *. https://doi.org/*
Published in Space Weather, 2025
SuperDARN data assimilation with SMRAI model (submitted)
Recommended citation: Nakano, S., et al. (2025). "Data assimilation into a machine learning-based emulator of a global MHD simulation for analyzing the polar ionosphere" Space Weather. submitted, *. https://doi.org/*
Published in grl, 2025
RB dropout paper by CALET
Recommended citation: Freund, D., Blum, L., Huang, J., Vidal-Luengo, S., Bruno, A., & Kataoka, R. (2024). "Radiation-Belt Dropouts: Relationship with Geomagnetic Storms and MeV Precipitation" GRL, 52, e2024GL113660. https://doi.org/10.1029/2024GL113660
Published in ApJ, 2024
GCR north-south anisotropy paper
Recommended citation: Kozai, M., Y. Hayashi, K. Fujii, K. Munakata, C. Kato, N. Miyashita, A. Kadokura, R. Kataoka, S. Miyake, M. L. Duldig, J. E. Humble, and K. Iwai (2024). "Rigidity spectrum and its solar cycle variation of the north-south anisotropy in galactic cosmic-rays observed by ground-based muon detectors" ApJ. 977, 160. https://doi.org/10.3847/1538-4357/ad8577
Published in Scientific Report, 2024
Citizen science of magenta aurora during super magnetic storm
Recommended citation: Kataoka R., S. A. Reddy, S. Nakano, J. Pettit, and Y. Nakamura (2024). "Extended magenta aurora as revealed by citizen science" Scientific Report. 15, 25849. https://www.nature.com/articles/s41598-024-75184-9
Published in ApJ, 2024
phantom Forbush?
Recommended citation: Munakata et al. (2024). "Global analysis of the extended cosmic-ray decreases observed with world-wide networks of neutron monitors and muon detectors; temporal variation of the rigidity spectrum and its implication" ApJ. 974, 283. https://doi.org/10.3847/1538-4357/ad7466
Published in Journal of Geophysical Research: Space Physics, 2024
CALET collaboration paper
Recommended citation: Freund, D., Blum, L., Vidal-Luengo, S., Bruno, A., & Kataoka, R. (2024). "MeV Electron Precipitation during Radiation Belt Dropouts" Journal of Geophysical Research: Space Physics. 129, e2024JA032759. https://doi.org/10.1029/2024JA032759
Published in Journal of Geophysical Research: Space Physics, 2024
Jupiter paper
Recommended citation: Tanaka, T., Ebihara, Y., Watanabe, M., Fujita, S., & Kataoka, R. (2024). "Formation mechanism of fingers that protrude eastward from the Io plasma disk during the interchange instability" Journal of Geophysical Research: Space Physics. 129, e2024JA032559 https://doi.org/10.1029/2024JA032559
Published in Science Advances, 2024
Polar rain aurora during the day solar wind disappeared.
Recommended citation: Hosokawa, K., R. Kataoka, T. T. Tsuda, Y. Ogawa, Y. Zhang, and L. J. Paxton (2024). "Exceptionally gigantic aurora in the polar cap on a day when the solar wind almost disappeared" Science Advances. 10, 25. https://doi.org/10.1126/sciadv.adn5276
Published in Geophysical Research Letters, 2024
This paper is our first citizen science.
Recommended citation: Kataoka, R., Miyoshi, Y., Shiokawa, K., Nishitani, N., Keika, K., Amano, T., & Seki, K. (2024). "Magnetic storm-time red aurora as seen from Hokkaido, Japan on 1 December 2023 associated with high-density solar wind" Geophysical Research Letters. 51, e2024GL108778. https://doi.org/10.1029/2024GL108778
Published in Geophysical Research Letters, 2024
This paper shows the semiannual variation of REP events.
Recommended citation: Vidal-Luengo, S. E., Blum, L. W., Bruno, A., Guzik, T. G., de Nolfo, G., Ficklin, A. W., et al. (2024). "Comparative observations of the outer belt electron fluxes and precipitated relativistic electrons" Geophysical Research Letters. 51, e2024GL109673. https://doi.org/10.1029/2024GL109673
Published in Frontiers in Astronomy and Space Sciences, 2024
This paper discussed the cooling of the thermosphere during magnetic storms.
Recommended citation: Bag T, Kataoka R, Ogawa Y, Fujiwara H, Li Z, Singh V, Sivakumar V, Sridharan S, Pirnaris P and Tourgaidis T (2024). "Thermospheric nitric oxide energy budget during extreme geomagnetic storms: a comparative study " Front. Astron. Space Sci.. 11:1273079. https://doi.org/10.3389/fspas.2024.1273079
Published in Journal of Geophysical Research: Space Physics, 2024
This paper discussed the origin of NBZ convection.
Recommended citation: Tanaka, T., Ebihara, Y., Watanabe, M., Fujita, S., & Kataoka, R. (2024). "Multiple convection cells induced by in‐front and off‐front interactions between the obliquely northward IMF and the geomagnetic field " Journal of Geophysical Research: Space Physics. 129, e2023JA031994. https://doi.org/10.1029/2023JA031994
Published in J. Plasma Fusion Res., 2024
This paper reviewed some works of extreme magnetic storms. (in Japanese)
Recommended citation: 片岡龍峰 (2024). "宇宙天気に関する研究の様々な広がり～磁気嵐の成因に関する研究紹介～" プラズマ・核融合学会誌. 100(4), 187-192 https://www.jspf.or.jp/Journal/PDF_JSPF/jspf2024_04/jspf2024_04-187.pdf
Published in Journal of Geophysical Research: Space Physics, 2024
This paper shows the AI analysis of REP events.
Recommended citation: Vidal-Luengo, S. E., Blum, L. W., Bruno, A., Ficklin, A. W., de Nolfo, G., Guzik, T. G., et al. (2024). "Characterization of Relativistic Electron Precipitation Events Observed by the CALET Experiment Using Self-Organizing-Maps" Journal of Geophysical Research: Space Physics. 129, e2024JA032481 http://dx.doi.org/10.1029/2024JA032481
Published in 国文学研究資料館紀要, 2024
This paper shows the analysis of a red sign event in 1370 AD (written in Japanese)
Recommended citation: 片岡龍峰 (2024). "縁起と赤気 付・関連史料翻刻" 国文学研究資料館紀要 文学研究篇. 50, 79-102. https://kokubunken.repo.nii.ac.jp/records/2000095
Published in Advances in Space Research, 2024
This paper shows the energy spectra of iron and nickel measured by ISS CALET project
Recommended citation: Adriani, O. et al. (2024). "Direct measurements of cosmic - ray iron and nickel with CALET on the International Space Station" Advances in Space Research. in press. https://doi.org/10.1016/j.asr.2024.03.052
Published in Geophysical Research Letters, 2024
This paper discusses the REP events at ISS associated with EMIC waves.
Recommended citation: Blum, L. W., Bruno, A., Capannolo, L., Ma, Q., Kataoka, R., Torii, S., & Baishev, D. (2024). "On the Spatial and Temporal Evolution of EMIC Wave-Driven Relativistic Electron Precipitation: Magnetically Conjugate Observations From the Van Allen Probes and CALET" Studies in Japanese Literature and Culture. 51, e2023GL107087 https://doi.org/10.1029/2023GL107087
Published in Space Weather, 2024
This paper shows the details of the surrogate model for REPPU auroral Ionosphere version 2 (SMRAI2)
Recommended citation: Kataoka, R., A. Nakamizo, S. Nakano, and S. Fujita (2024). "Machine learning-based emulator for physics-based simulation of auroral current system" Space Weather. 21, e2023SW003720 https://doi.org/10.1029/2023SW003720
Published in Studies in Japanese Literature and Culture, 2023
This paper used PHITS simulation to evaluate the atmospheric impacts of Sep 2017 space weather event.
Recommended citation: Murase, K., Kataoka, R., Nishiyama, T., Sato, K., Tsutsumi, M., Tanaka, Y., et al. (2023). "Atmospheric Ionizations by Solar X-Rays, Solar Protons, and Radiation Belt Electrons in September 2017 Space Weather Event" Space Weather. 21, e2023SW003651 https://doi.org/10.1029/2023SW003651
Published in Journal of Geophysical Research: Space Physics, 2023
This paper discusses the potential atmosphercic impact on Mars due to large solar energetic particle events, using PTRIP simulation.
Recommended citation: Nakamura, Y., Leblanc, F., Terada, N., Hiruba, S., Murata, I., Nakagawa, H., et al. (2023). "Numerical Prediction of Changes in Atmospheric Chemical Compositions During a Solar Energetic Particle Event on Mars" Journal of Geophysical Research: Space Physics. 128, e2022JA031250 https://doi.org/10.1029/2022JA031250
Published in Annales Geophysicae, 2023
This paper demostrates the probabilistic prediction of AE index using ESN.
Recommended citation: Nakano, S., Kataoka, R., Nosé, M., and Gjerloev, J. W. (2023). "Probabilistic modelling of substorm occurrences with an echo state network" Annales Geophysicae. 41, 529–539 https://doi.org/10.5194/angeo-41-529-2023
Published in Physical Review Letters, 2023
This paper shows the ISS-CALET measurement of TeV electrons and positrons.
Recommended citation: Adriani, O. et al. (CALET Collaboration) (2023). "Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons+Positrons in the TeV Region with CALET on the International Space Station" Physical Review Letters. 131, 191001 https://doi.org/10.1103/PhysRevLett.131.191001
Published in サステナビリティ教育研究, 2023
This paper discussed the ESD aspect of Japanese literature based on the studies of historical auroras.
Recommended citation: 片岡龍峰 (2023). "日本の古典籍を用いたオーロラ研究から考える古文・漢文の学習" サステナビリティ教育研究. 第5号, 42-48 http://hdl.handle.net/10928/1646
Published in Earth, Planets and Space, 2023
This paper shows the details of the surrogate model for REPPU auroral Ionosphere version 1 (SMRAI1)
Recommended citation: Kataoka, R., S. Nakano, and S. Fujita (2023). "Machine learning emulator for physics-based prediction of ionospheric potential response to solar wind variations" Earth, Planets and Space. 75, 139 https://doi.org/10.1186/s40623-023-01896-3
Published in Frontiers in Earth Science, 2023
This paper discusses the possible link between GCR and climate.
Recommended citation: Miyahara H, Kusano K, Kataoka R, Shima S-i and Touber E (2023). "Response of high-altitude clouds to the galactic cosmic ray cycles in tropical regions" Frontiers in Earth Science. 11:1157753 https://doi.org/10.3389/feart.2023.1157753
Published in Journal of Geophysical Research: Space Physics, 2023
This paper explain the 100-fps all-sky camera observation.
Recommended citation: Hosokawa, K., Oyama, S.-I., Ogawa, Y., Miyoshi, Y., Kurita, S., Teramoto, M., et al. (2023). "A Ground-Based Instrument Suite for Integrated High-Time Resolution Measurements of Pulsating Aurora With Arase" Journal of Geophysical Research: Space Physics. 128, e2023JA031527 https://doi.org/10.1029/2023JA031527
Published in Physical Review Letters, 2023
This paper shows the CAELT GeV e+p measurement (GCR solar modulation) compared with a modeling work.
Recommended citation: Adriani, O. et al. (CALET Collaboration) (2023). "Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station" Physical Review Letters. 130, 211001 https://doi.org/10.1103/PhysRevLett.130.211001
Published in Journal of Geophysical Research: Space Physics, 2023
This paper discusses the Jovian magnetospheric dynamics using REPPU simulation.
Recommended citation: Tanaka, T., Ebihara, Y., Watanabe, M., Fujita, S., & Kataoka, R. (2023). "Radial Transport of Io Plasma From the Inner Magnetosphere to the Tail" Journal of Geophysical Research: Space Physics. 128, e2022JA030891 https://doi.org/10.1029/2022JA030891
Published in Studies in Japanese Literature and Culture, 2023
This paper lists the red auroral events in Japanese history.
Recommended citation: Kataoka, R. (2023). "The Clustering Occurrence of Red Sign Auroral Events in Japanese History" Studies in Japanese Literature and Culture. 6, 119-143 http://id.nii.ac.jp/1283/00004724/