K. Yamamoto A. V. Rubtsov D. V. Kostarev P. N. Mager D. Yu. Klimushkin M. Nosé A. Matsuoka K. Asamura Y. Miyoshi S. Yokota S. Kasahara T. Hori K. Keika Y. Kasahara A. Kumamoto F. Tsuchiya M. Shoji S. Nakamura I. Shinohara
Geophysical Research Letters 51(8) 2024年4月 [査読有り]
Abstract
We present the first direct evidence of an in situ excitation of drift‐compressional waves driven by drift resonance with ring current protons in the magnetosphere. Compressional Pc4–5 waves with frequencies of 4–12 mHz were observed by ...
We have developed a low-energy particle experiment that alternately measures ions and electrons in space. The ability to switch between ion and electron measurements is achieved by simply adding ultra-thin carbon foils and positive and n...
T. Namekawa T. Mitani K. Asamura Y. Miyoshi K. Hosokawa M. Lessard C. Moser A. J. Halford T. Sakanoi M. Kawamura M. Nose R. Nomura M. Teramoto M. Shumko K. A. Lynch A. N. Jaynes M. G. McHarg
Geophysical Research Letters 50(24) 2023年12月 [査読有り]
Abstract
We have identified for the first time an energy‐time dispersion of precipitating electron flux in a pulsating aurora patch, ranging from 6.7 to 580 keV, through simultaneous in‐situ observations of sub‐relativistic electrons of microburs...
L. M. Kistler K. Asamura S. Kasahara Y. Miyoshi C. G. Mouikis K. Keika S. M. Petrinec M. L. Stevens T. Hori S. Yokota I. Shinohara
Nature Communications 14(1) 2023年10月 [査読有り]
Abstract
Both solar wind and ionospheric sources contribute to the magnetotail plasma sheet, but how their contribution changes during a geomagnetic storm is an open question. The source is critical because the plasma sheet properties control the...
L. Chen K. Shiokawa Y. Miyoshi S. Oyama C‐W. Jun Y. Ogawa K. Hosokawa Y. Kazama S. Y. Wang S. W. Y. Tam T. F. Chang B. J. Wang K. Asamura S. Kasahara S. Yokota T. Hori K. Keika Y. Kasaba A. Kumamoto F. Tsuchiya M. Shoji Y. Kasahara A. Matsuoka I. Shinohara S. Nakamura
Journal of Geophysical Research: Space Physics 128(10) 2023年9月 [査読有り]
Abstract
Although many substorm‐related observations have been made, we still have limited insight into propagation of the plasma and field perturbations in Pi2 frequencies (∼7‐25 mHz) in association with substorm aurora, particularly from the au...
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