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Start Over Author "Ozaki, M" Journal geophysical research letters
8 results on '"Ozaki, M"'

1. Quantifying the Size and Duration of a Microburst‐Producing Chorus Region on 5 December 2017

Author

Elliott, S. S., primary, Breneman, A. W., additional, Colpitts, C., additional, Pettit, J. M., additional, Cattell, C. A., additional, Halford, A. J., additional, Shumko, M., additional, Sample, J., additional, Johnson, A. T., additional, Miyoshi, Y., additional, Kasahara, Y., additional, Cully, C. M., additional, Nakamura, S., additional, Mitani, T., additional, Hori, T., additional, Shinohara, I., additional, Shiokawa, K., additional, Matsuda, S., additional, Connors, M., additional, Ozaki, M., additional, and Manninen, J., additional

Published
2022
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2. Discovery of 1Hz Range Modulation of Isolated Proton Aurora at Subauroral Latitudes

Author

Ozaki, M., Shiokawa, K., Miyoshi, Y., Kataoka, R., Connors, M., Inoue, T., Yagitani, S., Ebihara, Y., Jun, C.-W., Nomura, R., Sakaguchi, K., Otsuka, Y., Uchida, H. A., Schofield, I., and Danskin, D. W.

Subjects
isolated proton aurora, Computer Science::Systems and Control, Astrophysics::High Energy Astrophysical Phenomena, Pc1 geomagnetic pulsations, wave‐particle interaction
Abstract

Isolated proton aurora (IPA) is a manifestation of the wave‐particle interaction visible at subauroral latitudes, with activity on many timescales. We herein present the first observational evidence of rapid luminous modulation of IPA correlated with simultaneously observed Pc1 waves observed on the ground, which are equivalent to the electromagnetic ion cyclotron (EMIC) waves in the magnetosphere. The fastest luminous modulation of IPA was observed in the 1 Hz frequency range, which was twice the frequency of the related Pc1 waves. The time lag between variations of Pc1 wave power and the IPA luminosity suggests that the source regions of IPA are distributed near the magnetic equator, suggesting an EMIC wave‐energetic (a few tens of keV) proton or relativistic (MeV or sub‐MeV) electron interaction. The generation mechanism of this 1 Hz luminous modulation remains an open issue, but this study supports the importance of nonlinear pitch angle scattering via wave‐particle interactions.

Published
2018

3. Purple Auroral Rays and Global Pc1 Pulsations Observed at the CIR-Associated Solar Wind Density Enhancement on 21 March 2017

Author

Shiokawa, K. (K.), Ozaki, M. (M.), Kadokura, A. (A.), Endo, Y. (Y.), Sakanoi, T. (T.), Kurita, S. (S.), Miyoshi, Y. (Y.), Oyama, S. -. (S. -I.), Connors, M. (M.), Schofield, I. (I.), Ruohoniemi, J. M. (J. M.), Nose, M. (M.), Nagatsuma, T. (T.), Sakaguchi, K. (K.), Baishev, D. G. (D. G.), Pashinin, A. (A.), Rakhmatulin, R. (R.), Shevtsov, B. (B.), Poddelsky, I. (I.), Engebretson, M. (M.), Raita, T. (Tero), Tanaka, Y. -. (Y. -M.), Shinohara, M. (M.), Teramoto, M. (M.), Nomura, R. (R.), Fujimoto, A. (A.), Matsuoka, A. (A.), Higashio, N. (N.), Takashima, T. (T.), Shinohara, I. (I.), and Albert, J. M. (Jay M.)

Subjects
Arase satellite, Pc1 pulsation, CIR storm, EMIC wave, PWING project, purple aurora
Abstract

This paper reports two unique auroral features: postmidnight purple auroral rays and global Pc1 geomagnetic pulsations, observed before the onset of the corotating interaction region (CIR) storm of 21 March 2017, at the beginning of the first campaign of the new Particles and Waves in the Inner magnetosphere using Ground‐based network observation (PWING) longitudinal ground network with the Arase satellite. The purple auroral rays were observed from ~0315 to 0430 UT (~03–04 magnetic local time) in the northeastern sky at Husafell, Iceland (magnetic latitude: 64.9°N). We newly propose that the entry of high‐density CIR plasma into the magnetotail created purple auroral rays in the sunlit ionosphere. Pc1 geomagnetic pulsations at frequencies of 0–0.5 Hz were observed after ~00 UT over a wide local time range, of 13 hr, from midnight to afternoon sectors at subauroral latitudes associated with CIR arrival. These results indicate preconditioning of the magnetosphere due to crossing of a CIR., ファイル公開：2019-04-28

Published
2018

4. Energetic Electron Precipitation Associated With Pulsating Aurora Observed by VLF Radio Propagation During the Recovery Phase of a Substorm on 27 March 2017

Author

Tsuchiya, F., primary, Hirai, A., additional, Obara, T., additional, Misawa, H., additional, Kurita, S., additional, Miyoshi, Y., additional, Shiokawa, K., additional, Connors, M., additional, Ozaki, M., additional, Kasahara, Y., additional, Kumamoto, A., additional, Kasaba, Y., additional, Matsuoka, A., additional, Shoji, M., additional, and Shinohara, I., additional

Published
2018
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5. Electrostatic Electron Cyclotron Harmonic Waves as a Candidate to Cause Pulsating Auroras

Author

Fukizawa, M., primary, Sakanoi, T., additional, Miyoshi, Y., additional, Hosokawa, K., additional, Shiokawa, K., additional, Katoh, Y., additional, Kazama, Y., additional, Kumamoto, A., additional, Tsuchiya, F., additional, Miyashita, Y., additional, Tanaka, Y. ‐M., additional, Kasahara, Y., additional, Ozaki, M., additional, Matsuoka, A., additional, Matsuda, S., additional, Hikishima, M., additional, Oyama, S., additional, Ogawa, Y., additional, Kurita, S., additional, and Fujii, R., additional

Published
2018
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6. Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite‐PWING Observations

Author

Ozaki, M., primary, Shiokawa, K., additional, Miyoshi, Y., additional, Hosokawa, K., additional, Oyama, S., additional, Yagitani, S., additional, Kasahara, Y., additional, Kasaba, Y., additional, Matsuda, S., additional, Kataoka, R., additional, Ebihara, Y., additional, Ogawa, Y., additional, Otsuka, Y., additional, Kurita, S., additional, Moore, R. C., additional, Tanaka, Y.‐M., additional, Nosé, M., additional, Nagatsuma, T., additional, Connors, M., additional, Nishitani, N., additional, Katoh, Y., additional, Hikishima, M., additional, Kumamoto, A., additional, Tsuchiya, F., additional, Kadokura, A., additional, Nishiyama, T., additional, Inoue, T., additional, Imamura, K., additional, Matsuoka, A., additional, and Shinohara, I., additional

Published
2018
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7. Discovery of 1 Hz Range Modulation of Isolated Proton Aurora at Subauroral Latitudes

Author

Ozaki, M., primary, Shiokawa, K., additional, Miyoshi, Y., additional, Kataoka, R., additional, Connors, M., additional, Inoue, T., additional, Yagitani, S., additional, Ebihara, Y., additional, Jun, C.‐W., additional, Nomura, R., additional, Sakaguchi, K., additional, Otsuka, Y., additional, Uchida, H. A., additional, Schofield, I., additional, and Danskin, D. W., additional

Published
2018
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8. Fast modulations of pulsating proton aurora related to subpacket structures of Pc1 geomagnetic pulsations at subauroral latitudes

Author

Ozaki, M., primary, Shiokawa, K., additional, Miyoshi, Y., additional, Kataoka, R., additional, Yagitani, S., additional, Inoue, T., additional, Ebihara, Y., additional, Jun, C.‐W, additional, Nomura, R., additional, Sakaguchi, K., additional, Otsuka, Y., additional, Shoji, M., additional, Schofield, I., additional, Connors, M., additional, and Jordanova, V. K., additional

Published
2016
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