Search Publications
Magnetic Field in the Earth's Magnetosheath: Models Versus Observations
Vandas, M.; Romashets, E.
Magnetic field measurements in the Earth's magnetosheath are compared with four analytical models, namely Kobel and Flückiger (1994), (https://doi.org/10.1029/94ja01778), Romashets and Vandas (2019), (https://doi.org/10.1029/2018ja026006), Vandas and…
Suprathermal Outflowing H+ Ions in the Lobe Driven by an Interplanetary Shock: 1. An Observation Event
Mouikis, C. G.; Wang, Chih-Ping; Wang, Xueyi +2 more
To better understand how sharp changes in the solar wind and interplanetary magnetic field conditions affect the ionosphere outflows at high latitudes, we analyze an event observed on 17 July 2002 showing suprathermal (tens to hundreds of eV) outflowing H+ ions in the lobe driven by the impact of an interplanetary (IP) shock. A spacecra…
Revised Magnetospheric Model Reveals Signatures of Field-Aligned Current Systems at Mercury
Plaschke, Ferdinand; Exner, W.; Heyner, D. +2 more
Mercury is the smallest and innermost planet of our solar system and has a dipole-dominated internal magnetic field that is relatively weak, very axisymmetric and significantly offset toward north. Through the interaction with the solar wind, a magnetosphere is created. Compared to the magnetosphere of Earth, Mercury's magnetosphere is smaller and…
Stream Interaction Regions in the Minimum of Solar Cycles 23 and 24
Aguilar-Rodriguez, E.; Corona-Romero, P.; Gonzalez-Esparza, J. A. +1 more
Stream interaction regions (SIRs) dominate the large-scale solar wind dynamics during the minimum of the solar cycle. The interaction of SIRs with the magnetosphere causes most of geomagnetic storms during this epoch. We used in-situ solar wind observations at 1 AU to study 62 SIRs detected in the interval 2007-2008 (minimum of cycle 23) and 61 SI…
Plasma Observations in the Distant Magnetotail During Intervals of Northward IMF
Milan, S. E.; Mooney, M. K.; Bower, G. E.
We examine a 6-day traversal of the magnetotail by the ARTEMIS satellites during an interval of prolonged northward IMF. The electrostatic analyzer (ESA) onboard the ARTEMIS spacecraft measures high ion and electron fluxes at approximately 60 RE downtail in regions of the magnetotail which would normally be the magnetotail lobe, contain…
Latitudinal Distribution of Dayside Magnetospheric Currents Based on Cluster Observations
Dunlop, Malcolm W.; Liu, Wenlong; Du, Yingshuai +2 more
Based on the curlometer method, we calculate the azimuthal component of the current density from nearly 19 years of Fluxgate Magnetometer (FGM) data of Cluster and investigate its latitudinal distribution in the dayside noon sector (09:00-15:00 magnetic local time, MLT). A crossing event in the noon meridian plane shows an unexpected eastward curr…
Hybrid Kinetic Modeling of the Magnetosheath Impulsive Plasma Cloud Penetration Through the Magnetopause and Comparison With MMS and Other Spacecraft Observations
Giles, B. L.; Lipatov, A. S.; Gershman, D. J. +1 more
This research examines the plasma processes under penetration of the plasma clouds (plasmoids) across the magnetopause which is modeled as a tangential discontinuity (TD). Cases with the parallel magnetic field in both sides out of the TD are under investigation. Plasma parameters and magnetic field were chosen from the MMS mission and other space…
Merging Mesoscale Magnetotail Features and Ground B-Field Perturbation Network Connectivity During Substorm Activity
Adewuyi, M.; Keesee, A.; Ferdousi, B.
The connection between the magnetosphere and ionosphere is particularly dynamic during substorms. Mesoscale features in the magnetotail are consistent with substorm activity, including magnetic reconnection in the tail, flow channels, and particle injections. Observations of substorm related phenomena can be made using energetic neutral atom (ENA)…
Extent of the Magnetotail of Venus From the Solar Orbiter, Parker Solar Probe and BepiColombo Flybys
Sorriso-Valvo, Luca; Edberg, Niklas J. T.; Persson, Moa +20 more
We analyze data from multiple flybys by the Solar Orbiter, BepiColombo, and Parker Solar Probe (PSP) missions to study the interaction between Venus' plasma environment and the solar wind forming the induced magnetosphere. Through examination of magnetic field and plasma density signatures we characterize the spatial extent and dynamics of Venus' …
The Dynamic Venusian Bow Shock Model With the Nonlinear Effect of Magnetosonic Mach Number Based on Venus Express Observations
Xu, Qi; Zhang, Tielong; Zuo, Pingbing +8 more
Utilizing the 8.5-year Venus Express observations, we investigate the effects of solar wind magnetosonic Mach number MMS $\left({M}_{MS}\right)$, solar extreme ultraviolet (EUV) radiation, solar wind dynamic pressure Pd $\left({P}_{d}\right)$ and interplanetary magnetic field (IMF) on the shape of the Venusian bow shock. Our statistical analysis y…