Space Sciences

Plasmapause surface wave oscillates the magnetosphere and diffuse aurora

F. He, R. Guo, et al.

Discover the groundbreaking impact of plasmapause surface waves (PSW) on geomagnetic storms. This study, conducted by a team of renowned researchers, reveals how PSWs oscillate the plasmapause, trigger stunning sawtooth auroras, and propel ultra-low-frequency waves. With findings indicating that over 90% of geomagnetic storms from 2014 to 2018 exhibit these effects, this research uncovers a crucial mechanism in space energy dissipation.

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Abstract

This paper presents direct observations of a plasmapause surface wave (PSW) and its impacts during a geomagnetic storm using multi-satellite and ground-based measurements. The wave oscillates the plasmapause, triggers sawtooth auroral displays, and drives outward-propagating ultra-low-frequency waves. The study found that these surface-wave-driven sawtooth auroras occurred in over 90% of geomagnetic storms between 2014 and 2018, suggesting a systematic and crucial role in space energy dissipation.

Publisher

Nature Communications

Published On

Apr 03, 2020

Authors

Fei He, Rui-Long Guo, William R. Dunn, Zhong-Hua Yao, Hua-Sen Zhang, Yi-Xin Hao, Quan-Qi Shi, Zhao-Jin Rong, Jiang Liu, An-Min Tian, Xiao-Xin Zhang, Yong Wei, Yong-Liang Zhang, Qiu-Gang Zong, Zu-Yin Pu, Wei-Xing Wan

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