Results 41 to 50 of about 177,034 (301)
Solar Force-free Magnetic Fields [PDF]
, 2012 The structure and dynamics of the solar corona is dominated by the magnetic field. In most areas in the corona magnetic forces are so dominant that all non-magnetic forces like plasma pressure gradient and gravity can be neglected in the lowest order ...
Sakurai, Takashi, Wiegelmann, Thomas
core +2 more sources
Timescales of Birkeland Currents Driven by the IMF
Geophysical Research Letters, 2019 We obtain current densities from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE), alongside By and Bz from the Interplanetary Magnetic Field (IMF) for March 2010.
John C. Coxon +7 more
doaj +1 more source
Swarm field-aligned currents during a severe magnetic storm of September 2017 [PDF]
Annales Geophysicae, 2020 Swarm satellite observations are used to characterize the extreme behavior of large- and small-scale field-aligned currents (FACs) during the severe magnetic storm of September 2017.
R. Lukianova
doaj +1 more source
Dayside Field‐Aligned Current Impacts on Ionospheric Irregularities
Geophysical Research Letters, 2020 AbstractGlobal Navigation Satellite Systems (GNSS) are subject to disturbances caused by plasma irregularities in the ionosphere. Studies have suggested that in addition to the gradient drift and Kelvin‐Helmholtz instabilities, electron precipitation may be important for phase scintillations in the dayside auroral region.
A. Fæhn Follestad +8 more
openaire +3 more sources
Statistical comparison of seasonal variations in the GUMICS-4 global MHD model ionosphere and measurements [PDF]
, 2014 Understanding the capability of a simulation to reproduce observed features is a requirement for its use in operational space weather forecasting. We compare statistically ionospheric seasonal variations in the Grand Unified Magnetosphere-Ionosphere ...
Facskó, Gábor István +4 more
core +1 more source
High‐Latitude Electrodynamics Specified in SAMI3 Using AMPERE Field‐Aligned Currents
Space Weather, 2022 A new technique has been developed to determine the high‐latitude electric potential from observed field‐aligned currents (FACs) and modeled ionospheric conductances.
A. T. Chartier +5 more
doaj +1 more source
Cusp field‐aligned currents and ion outflows [PDF]
Journal of Geophysical Research: Space Physics, 2000 On September 24 and 25, 1998, the Polar spacecraft observed intense outflows of terrestrial ions in association with the passage of an interplanetary shock and coronal mass ejection. The orbit of the Fast Auroral Snapshot (FAST) Explorer was in the noon‐midnight meridian during this ion outflow event, and FAST passed through the day side cusp region at
R. J. Strangeway +8 more
openaire +1 more source
Ionosphere-magnetosphere coupling and field-aligned currents
Revista Brasileira de Ensino de FísicaIt is presented in this paper a review of one of several interactions between the magnetosphere and the ionosphere through the field-aligned currents (FACs).
D. Oliveira
doaj +1 more source
Auroral streamers: characteristics of associated precipitation,convection and field-aligned currents [PDF]
Annales Geophysicae, 2004 During the long-duration steady convection activity on 11 December 1998, the development of a few dozen auroral streamers was monitored by Polar UVI instrument in the dark northern nightside ionosphere.
V. A. Sergeev +5 more
doaj +1 more source
Influences of various space current systems on the geomagnetic field in near-Earth space
Earth and Planetary Physics, 2023 Ground and space-based observations of the geomagnetic field are usually a superposition of different sources from the Earth’s core, lithosphere, ocean, ionosphere, and magnetosphere, and also from field-aligned currents coupling the ionosphere and ...
YaBing Wang +8 more
doaj +1 more source