6 citations · 8 across the 4 of their papers we have counts for
4 papers
Ionospheric current system accompanied by auroral vortex streets
Yasutaka Hiraki
High resolution optical measurements have revealed that a sudden brightening of aurora and its deformation from an arc-like to a vortex street structure appear just at the onset of…
Threshold of auroral intensification reduced by electron precipitation effect
Yasutaka Hiraki
It has been known that discrete aurora suddenly intensifies and deforms from an arc-like to a variety of wavy/vortex structures, especially during a substorm period. The instabilit…
Vortices at the magnetic equator generated by hybrid Alfven resonant waves
Yasutaka Hiraki
We performed three-dimensional magnetohydrodynamic simulations of shear Alfven waves in a full field line system with magnetosphere-ionosphere coupling and plasma non-uniformities.…
Auroral vortex street formed by the magnetosphere-ionosphere coupling instability
Yasutaka Hiraki
By performing three-dimensional nonlinear MHD simulations including Alfven eigenmode perturbations most unstable to the ionospheric feedback effects, we reproduced the auroral vort…