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Updated: Oct 15, 2025

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
Published on: July 30, 2020
Small-Scale Dynamic Aurora
Ryuho Kataoka1,2, Christopher C Chaston3, David Knudsen4
1National Institute of Polar Research, 10-3 Midori-cho, Tachikawa, Tokyo, 185-0031 Japan.
Abstract:
Small-scale dynamic auroras have spatial scales of a few km or less, and temporal scales of a few seconds or less, which visualize the complex interplay among charged particles, Alfvén waves, and plasma instabilities working in the magnetosphere-ionosphere coupled regions. We summarize the observed properties of flickering auroras, vortex motions, and filamentary structures. We also summarize the development of fundamental theories, such as dispersive Alfvén waves (DAWs), plasma instabilities in the auroral acceleration region, ionospheric feedback instabilities (IFI), and the ionospheric Alfvén resonator (IAR).
Supplementary Information:
The online version contains supplementary material available at 10.1007/s11214-021-00796-w.
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