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Magnetospheric Response To Solar Wind Forcing: Ultra-Low-Frequency Wave-Particle Interaction Perspective
Zong, Qiugang
Solar wind forcing, e.g., interplanetary shock and/or solar wind dynamic pressure pulses impacting Earth's magnetosphere, manifests many fundamental important space physics phenomena, including producing electromagnetic waves, plasma heating, and energetic particle acceleration. This paper summarizes our present understanding of the magnetospheric…
Solar wind magnetic holes can cross the bow shock and enter the magnetosheath
Raptis, Savvas; Karlsson, Tomas; Nilsson, Hans +2 more
Solar wind magnetic holes are localized depressions of the magnetic field strength, on timescales of seconds to minutes. We use Cluster multipoint measurements to identify 26 magnetic holes which are observed just upstream of the bow shock and, a short time later, downstream in the magnetosheath, thus showing that they can penetrate the bow shock …
Statistical study and corresponding evolution of plasmaspheric plumes under different levels of geomagnetic storms
Yuan, Zhigang; Ouyang, Zhihai; Deng, Xiaohua +4 more
Using observations of Van Allen Probes, we present a statistical study of plasmaspheric plumes in the inner magnetosphere. Plasmaspheric plumes tend to occur during the recovery phase of geomagnetic storms. Furthermore, the results imply that the occurrence rate of observed plasmaspheric plume in the inner magnetosphere is larger during stronger g…
Dayside magnetopause reconnection and flux transfer events under radial interplanetary magnetic field (IMF): BepiColombo Earth-flyby observations
Trattner, Karlheinz J.; Saito, Yoshifumi; Zong, Qiu-Gang +8 more
This study analyzes the flux transfer event (FTE)-type flux ropes and magnetic reconnection around the dayside magnetopause during BepiColombo's Earth flyby. The magnetosheath has a high plasma β (∼ 8), and the interplanetary magnetic field (IMF) has a significant radial component. Six flux ropes are identified around the magnetopause. The motion …
Estimating ion escape from unmagnetized planets
Holmstrom, Mats
We propose a new method to estimate ion escape from unmagnetized planets that combines observations and models. Assuming that upstream solar wind conditions are known, a computer model of the interaction between the solar wind and the planet is executed for different ionospheric ion production rates. This results in different amounts of mass loadi…
An investigation into the spectral parameters of ultra-low-frequency (ULF) waves in the polar caps and magnetotail
Nosikova, Nataliya Sergeevna; Yagova, Nadezda Viktorovna; Baddeley, Lisa Jane +2 more
The present case study is focused on fluctuations at ∼ 1.5 mHz observed on open field lines in both of the polar caps in ground-based geomagnetic data and in the electron concentration in the Northern Hemisphere ionosphere. Coherent pulsations with a relatively narrow narrowband-like spectra and a higher fraction of transversal components in the t…