Plasmapause Surface Waves Triggered by Substorms
- 1(yixinhao@pku.edu.cn) Institute of Space Physics and Applied Technology, Peking University, 100871, Beijing, Peopleʼs Republic of China
- 2Section 2.7 Space Physics and SpaceWeather, GFZ German Research Centre forGeosciences, Potsdam, Germany
- 3Physics Department and GeophysicalInstitute, University of Alaska Fairbanks,Fairbanks, USA
In this study, we present in-situ measurement by Van Allen Probes showing that surface wave could oscillate the plasmapause and modulate hiss and electron cyclotron harmonic (ECH) waves. Plasmapause sur-face wave (PSW) in Ps6 band was observed during an intense substorm on 16 July 2017, accompanied with quasi-periodic emissions of hiss (positively correlated to plasma density) and ECH waves (anticorrelated to the density). Phase relation between magnetic field and velocity perturbations indicatesthat the PSW was an eigenmode between southern and northern ionosphere. Measurements from ground-based magnetometers suggest that such PSW propagates sunward at dusk flank and were excited around the expansion phase of an intense substorm. Addiational cases of PSWs are also presented to demonstrate that such waves are commonly observed near plasmapause and are likely to be related to substorm activities.
How to cite: Hao, Y., Zong, Q., Yue, C., Zhou, X., Zhang, H., Pu, Z., and Shprits, Y.: Plasmapause Surface Waves Triggered by Substorms, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-11579, https://doi.org/10.5194/egusphere-egu22-11579, 2022.
