Results 41 to 50 of about 4,372 (239)

Contribution of magnetotail currents to Dst index during different intensity magnetic storms: a global MHD model study

Frontiers in Astronomy and Space Sciences
The Disturbance Storm Time (Dst) index serves as a critical indicator for quantifying geomagnetic storm intensity; however, the precise contribution of magnetotail currents to its formation remains inadequately characterized.
Jiawen Yue, Jiawen Yue, Xiaocheng Guo, Xiaocheng Guo, Yuxian Wang, Chi Wang, Chi Wang   +6 more
doaj   +1 more source

Magnetohydrodynamic Turbulence in the Earth’s Magnetotail From Observations and Global MHD Simulations

Frontiers in Astronomy and Space Sciences, 2021
Magnetohydrodynamic (MHD) turbulent flows are found in the solar wind, the magnetosheath and the magnetotail plasma sheet. In this paper, we review both observational and theoretical evidence for turbulent flow in the magnetotail.
Mostafa El-Alaoui, Mostafa El-Alaoui, Mostafa El-Alaoui, Raymond J. Walker, James M. Weygand, Giovanni Lapenta, Giovanni Lapenta, Melvyn L. Goldstein, Melvyn L. Goldstein   +8 more
doaj   +1 more source

Cluster magnetotail observations of a tailward-travelling plasmoid at substorm expansion phase onset and field aligned currents in the plasma sheet boundary layer [PDF]

, 2005
We present data from both ground- and space- based instruments for a substorm event which occurred on 5 October 2002, with an expansion phase onset time of 02:50 UT determined from the ground magnetometer data.
H. J. Singer, M. G. Henderson (7591460), S. W. H. Cowley (7590302), M. G. Henderson, J. A. Davies (4412452), H. J. Singer (7591463), Fazakerley, A. N., Bosqued, J. M., Mark Lester (6477935), Donovan, E., J-M. Bosqued (7591451), Nakamura, R., Milan, S. E., Singer, H. J., Lester, M., E. Donovan (7591466), J. Waterman, J. F. Watermann (7591277), J. A. Wild, Grocott, A., M. Lester, A. N. Fazakerley, Watermann, J. F., Davies, J. A., S. E. Milan, Cowley, S. W. H., N. C. Draper, Gabrielle P. Provan (7591445), A. N. Fazakerley (7591259), Owen, C. J., R. Nakamura, J. P. Dewhurst (7591454), S. W. H. Cowley, J.-M. Bosqued, C. J. Owen, Dewhurst, J. P., C. J. Owen (7591457), Draper, N. C., J. P. Dewhurst, Adrian Grocott (7590026), J. A. Wild (7591442), Bosqued, J.-M., Waterman, J., A. Grocott, G. Provan, A. Lahiff, Wild, J.A., J. A. Davies, A. D. Lahiff (7591448), Provan, G., J.A. Wild, Wild, J. A., Henderson, M. G., Steve E. Milan (7589666), R. Nakamura (7591343), E. Donovan, Lahiff, A., N. C. Draper (7591439)   +57 more
core   +1 more source

Method to locate the polar cap boundary in the nightside ionosphere and application to a substorm event [PDF]

, 2006
International audienceIn this paper we describe a new method to be used for the polar cap boundary (PCB) determination in the nightside ionosphere by using the EISCAT Svalbard radar (ESR) field-aligned measurements by the 42-m antenna and southward ...
A. T. Aikio, O. Amm, Amm, Olaf, Aikio, A.T., Aikio, Anita T., Aikio, A. T., A. Kozlovsky, Kozlovsky, Alexander, Pitkänen, Timo, Pitkänen, T., Amm, O., Kozlovsky, A., T. Pitkänen   +12 more
core   +1 more source

Earthward Flow Bursts in the Magnetotail Driven by Solar Wind Pressure Impulse [PDF]

Journal of Astronomy and Space Sciences, 2008
On August 31, 2001, ~ 1705 - 1718 UT, Cluster was located near the midnight magnetotail, GSE (x, y, z) ~ (-19, - 2,2) RE, and observed fast earthward flow bursts in the vicinity of the neutral sheet.
Khan-Hyuk Kim, Young-Sil Kwak, Jae-Jin Lee, Junga Hwang   +3 more
doaj   +1 more source

Introduction to TREx‐ATM V2.0: A Versatile Model of Auroral Transport and Its Effects in the Ionosphere

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Auroral transport models (ATMs) play an important role in quantitative studies of optical auroras, their driving mechanisms, and their effects on the ionosphere and thermosphere. TREx‐ATM was initially developed as the support model for the Transition Region Explorer (TREx) mission, and has gained increasing applications in the community in ...
Jun Liang, E. Donovan, E. Spanswick, C. Gabrielse, D. Chaddock, J. Houghton   +5 more
wiley   +1 more source

Convection in the magnetotail

Eos, Transactions American Geophysical Union, 1991
It is well known that the Earth's magnetosphere is permeated by a large‐scale electric field, E, which in its turn produces a global flow pattern known as magnetospheric convection, with velocity u = (E × B)/B2 . Convection is the key to understanding the global features of the magnetosphere, for instance the large‐scale flow of electric currents along
openaire   +1 more source

Asymmetric distribution of reconnection jet fronts in the Jovian nightside magnetosphere [PDF]

, 2013
Magnetic reconnection plays important roles in mass transport and energy conversion in planetary magnetospheres. It is considered that transient reconnection causes localized auroral arcs or spots in the Jovian magnetosphere, by analogy to the case in ...
Kimura, T., Badman, S. V., Kasahara, S., Tao, C., Retinò, A., Badman, S., Retinò, Alessandro, Masters, A., Kronberg, E., Fujimoto, M., Kronberg, E. A., Krupp, N.   +11 more
core   +1 more source

3D GUMICS Simulations of Northward IMF Magnetotail Structure

, 2023
This study presents a re-evaluation of the Kullen and Janhunen (2004, ) global northward interplanetary magnetic field (IMF) simulation, using the Grand Unified Magnetosphere-Ionosphere Coupling Simulation version 4 (GUMICS-4), a global MHD model.
Fear, R.C., Palmroth, Minna, Fryer, L. J.,, Cassak, P. A.,, Cassak, P.A., Hoilijoki, S., Palmroth, M.,, Kullen, A., Janhunen, P., Cassak, P. A., J. C. Coxon, A. Kullen, Fryer, L.J., Fear, R. C.,, Coxon, J. C.,, Kullen, Anita,, Palmroth, M., R. C. Fear, Hoilijoki, S.,, Janhunen, Pekka, I. L. Gingell, P. Janhunen, Gingell, I. L., M. Palmroth, Fryer, L. J., S. Hoilijoki, P. A. Cassak, Hoilijoki, Sanni, Fear, R. C., L. J. Fryer, Gingell, I.L., Coxon, J. C., Coxon, J.C., Gingell, I. L.,, Janhunen, P.,   +34 more
core   +1 more source

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, Robert M. Shore, Mervyn P. Freeman, Robert C. Fear, Stephen D. Browett, Andrew W. Smith, Daniel K. Whiter, Brian J. Anderson   +7 more
doaj   +1 more source