Results 31 to 40 of about 179,377 (341)

Dayside field‐aligned current source regions [PDF]

Journal of Geophysical Research: Space Physics, 2010
The source regions of region‐0 (R0), region‐1 (R1), and region‐2 (R2) field‐aligned currents (FACs) were statistically determined using DMSP particle precipitation and magnetometer data. Each FAC sheet originates from more than one region in the magnetosphere, depending on the latitude and the magnetic local time (MLT).
Simon Wing, Shin‐ichi Ohtani, Patrick T. Newell, Tomoyuki Higuchi, Genta Ueno, James M. Weygand   +5 more
openaire   +1 more source

Determination of Auroral Electrodynamic Parameters From AMPERE Field‐Aligned Current Measurements

Space Weather, 2021
We calculate high latitude electrodynamic parameters using global maps of field‐aligned currents from the Active Magnetosphere and Planetary Response Experiment (AMPERE).
R. M. Robinson, Larry Zanetti, Brian Anderson, Sarah Vines, Jesper Gjerloev   +4 more
doaj   +1 more source

Kelvin-Helmholtz Vortices as an Interplay of Magnetosphere-Ionosphere Coupling

Frontiers in Astronomy and Space Sciences, 2022
The solar wind-magnetosphere interaction drives diverse physical processes on the flanks of Earth’s magnetopause, and in turn these processes couple to the ionosphere.
K.-J. Hwang, J. M. Weygand, D. G. Sibeck, J. L. Burch, M. L. Goldstein, C. P. Escoubet, E. Choi, K. Dokgo, B. L. Giles, C. J. Pollock, D. J. Gershman, C. T. Russell, R. J. Strangeway, R. B. Torbert   +13 more
doaj   +1 more source

Determination of vertical profiles of shell currents in the ionosphere [PDF]

Annales Geophysicae
In previous works, we found Euler potentials for the combined magnetic field of Earth's dipole, field-aligned currents, ring current, and the magnetopause surface currents (represented by Dungey's term) in the magnetosphere.
E. Romashets, M. Vandas
doaj   +1 more source

Filamentary Alfvénic structures excited at the edges of equatorial plasma bubbles [PDF]

Annales Geophysicae, 2007
Recent observations performed by the French DEMETER satellite at altitudes of about 710 km suggest that the generation of equatorial plasma bubbles correlates with the presence of filamentary structures of field aligned currents carried by Alfvén ...
R. Pottelette, M. Malingre, J. J. Berthelier, E. Seran, M. Parrot   +4 more
doaj   +1 more source

Downward auroral currents from the reconnection Hall-region [PDF]

, 2011
We present a simple (stationary) mechanism capable of generating the auroral downward field-aligned electric field {that is} needed for {accelerating the ionospheric electron component up into the magnetosphere and confining the ionospheric ions at low ...
Baumjohann, W., Nakamura, R., Treumann, R. A.   +2 more
core   +3 more sources

Field‐aligned currents during IMF ∼0 [PDF]

Geophysical Research Letters, 2001
We report on field‐aligned currents (FAC) obtained from precise magnetic field measurements made on‐board the Ørsted and Magsat satellites when the interplanetary magnetic field (IMF) was near zero. We found that Region 1/Region 2 currents persist through southward IMF, IMF ∼ 0, and northward IMF; also the central area of both the northern and southern
Papitashvili, V. O., Christiansen, F., Neubert, T.   +2 more
openaire   +2 more sources

Comparing magnetopause predictions from two MHD models during a geomagnetic storm and a quiet period

Frontiers in Astronomy and Space Sciences, 2023
Magnetopause location is an important prediction of numerical simulations of the magnetosphere, yet the models can err, either under-predicting or over-predicting the motion of the boundary.
Pauline M. Dredger, Ramon E. Lopez, Yaireska M. Collado-Vega   +2 more
doaj   +1 more source

Magnetospheric signatures of ionospheric density cavities observed by cluster [PDF]

, 2015
AJBR ackowledges support from STFC under consolidated grant ST/K000993/1.We present Cluster measurements of large amplitude electric fields corre- lated with intense downward field-aligned currents, observed during a nightside crossing of the auroral ...
Aikio, Aikio, Balogh, Blixt, Cran-McGreehin, Doe, Doe, Gustafsson, Ishii, Karlsson, Lysak, Marklund, Michell, Russell, Russell, Streltsov, Streltsov, Walén, Wright, Wright, Zettergren   +20 more
core   +4 more sources

Relationship between large-scale ionospheric field-aligned currents and electron/ion precipitations: DMSP observations

Earth, Planets and Space, 2020
In this study, we have derived field-aligned currents (FACs) from magnetometers onboard the Defense Meteorological Satellite Project (DMSP) satellites.
Chao Xiong, Claudia Stolle, Patrick Alken, Jan Rauberg   +3 more
doaj   +1 more source