Hokkaido auroras
Nakayama and Kataoka (2026). "Hokkaido auroras " JSWSC, submitted.
CV
Education
- Ph.D in Physics, Tohoku University, 2004/03
- M.S. in Physics, Tohoku University, 2001/03
- B.S. in Physics, Tohoku University, 1999/03
Work experience
- 2025/04 to present: Principal Research Scientist
- Okinawa Institute of Science and Technology
- Duties included: Own research
- 2023/04 to present: External Associate Professor
- The University of Tokyo, Japan
- Duties included: Teaching
- 2013/07 to 2025/03: Associate Professor
- National Institute of Polar Research, Japan
- Duties included: PIs and teaching (SOKENADAI)
- 2009/08~2013/06: Assistant Professor
- Tokyo Institute of Technology, Japan
- Duties included: Research on mass extinction
- 2007/04~2009/07: Special Postdoctoral Researcher
- RIKEN, Japan
- Duties included: Own research (MHD code development)
- Supervisor: Dr. Toshikazu Ebisuzaki
- 2004/04~2007/03: JSPS Postoctoral Researcher
- NICT, NASA/GSFC, and Nagoya University
- Duties included: Own research (space weather)
- Supervisor: Prof. Takashi Kikuchi
- 2001/04~2004/03: JSPS DC1 Researcher
- Tohoku University
- Duties included: Own research (dayside aurora)
- Supervisor: Prof. Hiroshi Fukunishi
- 2000/07~2000/09: Visiting Researcher
- Bell Labs, Lucent Technologies
- Supervisor: Dr. Louis Lanzerotti
- 1999/09~1999/11: Visiting Researcher
- Bell Labs, Lucent Technologies
- Supervisor: Dr. Louis Lanzerotti
Awards
- 2024/05: Tanakadate Award, SGEPSS
- 2016/04: Excellence in Refereeing, GRL, AGU
- 2015/04: The MEXT Young Scientists’ Prize
- 2011/09: Excellence in Refereeing, Space Weather, AGU
- 2009/09: Obayashi Award, SGEPSS
- 2004/03: President’s Award, Tohoku University
- 1999/12: Outstanding Student Paper Award, AGU Fall Meeting
Recent Publications (listed ater 2023 only)
The list of publications before 2023 is here (PDF file)
Climatology of Pi2 pulsations deduced from the Wp index
Nakano, S., Kataoka, R., and Nose (2025). "Climatology of Pi2 pulsations deduced from the Wp index" Journal of Geophysical Research: Space Physics, 130, e2025JA034345.
Data assimilation into a machine learning-based emulator of a global MHD simulation for analyzing the polar ionosphere
Nakano, S., Reddy, S. A., Kataoka, R., Nakamizo, A., Fujita, S., and Yukimatu, A. S. (2025). "Data assimilation into a machine learning-based emulator of a global MHD simulation for analyzing the polar ionosphere" Space Weather,23, e2025SW004488
Effects of the May 2024 Solar Storm on the Earth’s Radiation Belts Observed by CALET on the International Space Station
Ficklin, A. et al. (2026). "Effects of the May 2024 Solar Storm on the Earth's Radiation Belts Observed by CALET on the International Space Station" Geophysical Review Letters. submitted.
Data publication activities for the Global Muon Detector Network (GMDN)
Kozai, M., Y. Hayashi, C. Kato, K. Munakata, N. Miyashita, R. Kataoka, S. Miyake, and A. Kadokura (2025). "Data publication activities for the Global Muon Detector Network (GMDN)" Proceedings of Science. 501, ICRC2025
Roles of plasma sheet flow, plasma sheet dissipation and the M-I coupling in reproducing the substorm with the global simulation
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. 130, e2024JA033606.
Precision Spectral Measurements of Chronium and Titanium from 10 to 250 GeV/n and Sub-Iron to Iron Ratio with the Calorimetric Electron Telescope on the International Space Station
Adriani, O. et al. (CALET Collaboration) (2025). "Precision Spectral Measurements of Chronium and Titanium from 10 to 250 GeV/n and Sub-Iron to Iron Ratio with the Calorimetric Electron Telescope on the International Space Station" Physical Review Letters. 135, 021002.
Exploring outer radiation belt losses from the International Space Station
Zhang, X.-J., Artemyev, A., Katoh, Y., Hsieh, Y., Angelopoulos, V., Torii, S., et al. (2025). "Exploring outer radiation belt losses from the International Space Station" Geophysical Research Letters. 52, e2025GL116966.
Ground-based Observations of Temporal Variation of Cosmic Ray Spectrum during Forbush Decreases
Mitthumsiri, W. et al. (2025). "Ground-based Observations of Temporal Variation of Cosmic Ray Spectrum during Forbush Decreases" ApJL, 986, L7.
Atmospheric ionization caused by EMIC-wave driven energetic electron precipitation at auroral latitude
Murase, K., Kataoka, R., Tanaka, Y., Nishiyama, T., Hashimoto, T., & Sato, K. (2025). "Atmospheric ionization caused by EMIC-wave driven energetic electron precipitation at auroral latitude" Geophysical Research Letters. 52, e2024GL114248.
Effects of the May 2024 Solar Storm on the Earth’s Radiation Belts Observed by CALET on the International Space Station
Ficklin et al. (2025). "Effects of the May 2024 Solar Storm on the Earth's Radiation Belts Observed by CALET on the International Space Station" GRL, submitted, *.
Extended red aurora associated with super substorm igniting the October 10, 2024 magnetic storm as revealed by citizen science
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
Multipoint spacecraft measurements of an ICME structure in October 2021: From the solar surface to the inner heliosphere
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, *
Radiation-Belt Dropouts: Relationship with Geomagnetic Storms and MeV Precipitation
Freund, D., Blum, L., Huang, J., Vidal-Luengo, S., Bruno, A., & Kataoka, R. (2025). "Radiation-Belt Dropouts: Relationship with Geomagnetic Storms and MeV Precipitation" GRL, 52, e2024GL113660.
Rigidity spectrum and its solar cycle variation of the north-south anisotropy in galactic cosmic-rays observed by ground-based muon detectors
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.
Extended magenta aurora as revealed by citizen science
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.
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
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.
MeV Electron Precipitation during Radiation Belt Dropouts
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.
Formation mechanism of fingers that protrude eastward from the Io plasma disk during the interchange instability
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
Exceptionally gigantic aurora in the polar cap on a day when the solar wind almost disappeared
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.
Magnetic Storm-Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High-Density Solar Wind
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.
Comparative Observations of the Outer Belt Electron Fluxes and Precipitated Relativistic Electrons
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.
Thermospheric nitric oxide energy budget during extreme geomagnetic storms: a comparative study
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.
Multiple convection cells induced by in‐front and off‐front interactions between the obliquely northward IMF and the geomagnetic field
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.
Research Fields of Space Weather Forecast Featuring Magnetic Storm
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
Characterization of Relativistic Electron Precipitation Events Observed by the CALET Experiment Using Self-Organizing-Maps
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
Hisotrical records and red sign
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.
Direct measurements of cosmic - ray iron and nickel with CALET on the International Space Station
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.
On the Spatial and Temporal Evolution of EMIC Wave-Driven Relativistic Electron Precipitation: Magnetically Conjugate Observations From the Van Allen Probes and CALET
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
Machine learning-based emulator for physics-based simulation of auroral current system
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
Atmospheric Ionizations by Solar X-Rays, Solar Protons, and Radiation Belt Electrons in September 2017 Space Weather Event
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
Numerical Prediction of Changes in Atmospheric Chemical Compositions During a Solar Energetic Particle Event on Mars
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
Probabilistic modelling of substorm occurrences with an echo state network
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
Direct Measurement of the Spectral Structure of Cosmic-Ray Electrons+Positrons in the TeV Region with CALET on the International Space Station
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
Learning Old Japanese and Chinese Literature from the Study of Aurora using Japanese Classical Texts
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
Machine learning emulator for physics-based prediction of ionospheric potential response to solar wind variations
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
Response of high-altitude clouds to the galactic cosmic ray cycles in tropical regions
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
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., 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
Charge-Sign Dependent Cosmic-Ray Modulation Observed with the Calorimetric Electron Telescope on the International Space Station
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
Radial Transport of Io Plasma From the Inner Magnetosphere to the Tail
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
The Clustering Occurrence of Red Sign Auroral Events in Japanese History
Kataoka, R. (2023). "The Clustering Occurrence of Red Sign Auroral Events in Japanese History" Studies in Japanese Literature and Culture. 6, 119-143
Recent Talks (listed after 2023 only)
AI emulator and citizen science for understanding auroral space weather
Oral at AGU 2024, Washington DC, US
AI emulator and data assimilation of auroral current system
Oral at 15th Symposium on Polar Science, Tachikawa, Japan
Magnetic storm-time auroras as seen from Japan
Oral at SGESPSS 2024, Tachikawa, Japan
Citizen science of storm-time aurora in Japan
Oral at SGESPSS 2024, Tachikawa, Japan
Development of all-sky camera network over Antarctica
Oral at SGESPSS 2024, Tachikawa, Japan
Toward the surrogate model for REPPU auroral ionosphere ver3 (SMRAI3)
Poster at JpGU 2024, Makuhari, Japan
Magnetic storm-time red aurora as seen from Hokkaido, Japan on December 1, 2023 associated with high-density solar wind
Talk at JpGU 2024, Makuhari, Japan
Diffuse aurora flashes and black aurora associated with the dayside plasmapause as caused by a solar wind pressure pulse
Talk at JpGU 2024, Makuhari, Japan
Cause and Effects of Relativistic Electron Precipitation at CALET onboard ISS (Invited talk)
Talk at URSI GASS 2023, Sapporo, Japan
オーロラ電流系予測エミュレータの開発（招待講演）
Talk at 人工知能学会, 熊本
Machine learning emulator for physics-based prediction of ionospheric response to solar wind variations
Talk at JpGU 2023, Makuhari, Japan
Cause and Effects of Relativistic Electron Precipitation at CALET onboard ISS
Poster at JpGU 2023, Makuhari
Teaching
Service and leadership
- JpGU Space Weather and Space Climate session convener since 2015
- ISSI workshop convener of auroral physics in 2018
- PI of AuroraX project (2022-2027)
- PI of AI emulator project (2024-2027)