99 citations · 103 across the 5 of their papers we have counts for
5 papers
Dependence of the Solar Wind Plasma Density on Moderate- and Extremely High-Geomagnetic Activity Elucidated by Potential Learning
Ryozo Kitajima, Motoharu Nowada, Ryotaro Kamimura
The relationship between moderate and extremely high levels of geomagnetic activity, represented by the Kp index (2- to 5+ and 6- to 9), and solar wind conditions during southward…
Contemporaneous Appearances of Auroral Spiral and Transpolar Arc: Polar UVI Observations and Global MHD Simulations
Motoharu Nowada, Yukinaga Miyashita, Aoi Nakamizo +2
A local vortex-structured aurora and a large-scale transpolar arc (TPA) were contemporaneously observed by the Polar ultraviolet imager (UVI) during the late recovery phase of a su…
Auroral Morphological Changes to the Formation of Auroral Spiral during the Late Substorm Recovery Phase: Polar UVI and Ground All-Sky Camera Observations
Motoharu Nowada, Yukinaga Miyashita, Noora Partamies +2
The ultraviolet imager (UVI) of the Polar spacecraft and an all-sky camera at Longyearbyen contemporaneously detected an auroral vortex structure (so-called "auroral spiral") on 10…
Ionospheric Plasma Flows Associated with the Formation of the Distorted Nightside End of A Transpolar Arc
Motoharu Nowada, Adrian Grocott, Quan-Qi Shi
We investigate ionospheric flow patterns occurring on 28 January 2002 associated with the development of the nightside distorted end of a J-shaped transpolar arc (nightside distort…
Observations of kinetic-size magnetic holes in the magnetosheath
S. T. Yao, X. G. Wang, Q. Q. Shi +25
Magnetic holes (MHs), with a scale much greater than \r{ho}i (proton gyroradius), have been widely reported in various regions of space plasmas. On the other hand, kinetic-size mag…