Results 11 to 20 of about 932,549 (275)

New Aspects of Energy Conversion in Magnetic Island Dynamics: Particle-in-cell Simulation of Multiple Island Coalescence and MMS Observations

open access: yesThe Astrophysical Journal, 2023
Coalescence of multiple magnetic islands is recognized as an effective process to energize particles during magnetic reconnection, while its energy conversion process still remains unclear.
W.-L. Teh   +4 more
doaj   +1 more source

Formation of a strong southward IMF near the solar maximum of cycle 23 [PDF]

open access: yesAnnales Geophysicae, 2004
We analyzed observations of the solar activities and the solar wind parameters associated with large geomagnetic storms near the maximum of solar cycle 23.
S. Watari, M. Vandas, T. Watanabe
doaj   +1 more source

An Analytical Model of Turbulence in Parker Spiral Geometry and Associated Magnetic Field Line Lengths

open access: yesThe Astrophysical Journal, 2023
Understanding the magnetic connections from the Sun to interplanetary space is crucial for linking in situ particle observations with the solar source regions of the particles.
T. Laitinen   +3 more
doaj   +1 more source

Relationship of Transport Coefficients with Statistical Quantities of Charged Particles

open access: yesThe Astrophysical Journal, 2023
In previous studies, a general spatial transport equation was derived from the Fokker–Planck equation. The latter equation contains an infinite number of spatial derivative terms T _n = κ _nz ∂ ^n F /∂ z ^n with n = 1, 2, 3, ⋯ .
J. F. Wang, G. Qin
doaj   +1 more source

Long-duration high-energy proton events observed by GOES in October 1989 [PDF]

open access: yesAnnales Geophysicae, 1998
We consider the prolonged injection of the high-energy (>10 MeV) protons during the three successive events observed by GOES in October 1989. We apply a solar-rotation-stereoscopy approach to study the injection of the accelerated particles from ...
A. Anttila   +3 more
doaj   +1 more source

Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere [PDF]

open access: yesAnnales Geophysicae, 2004
The pressure pulse model for dayside transient ionospheric events predicts dawnward moving events at and prior to local noon during periods of spiral interplanetary magnetic field (IMF) orientation, but duskward moving events at and after local noon ...
G. I. Korotova   +4 more
doaj   +1 more source

On the solar origin of interplanetary disturbances observed in the vicinity of the Earth [PDF]

open access: yesAnnales Geophysicae, 2003
The solar origin of 40 interplanetary disturbances observed in the vicinity of the Earth between January 1997 and June 1998 is investigated in this paper.
N. Vilmer   +4 more
doaj   +1 more source

The influence of the interplanetary medium on SuperDARN radar scattering occurrence [PDF]

open access: yesAnnales Geophysicae, 2000
The effects of the characteristics of the interplanetary medium on the radar scattering occurrence, related to the whole array of SuperDARN radars installed in the Northern Hemisphere, have been studied over a two-year period.
P. Ballatore   +3 more
doaj   +1 more source

Detection of zero anisotropy at 5.2 AU during the November 1998 solar particle event: Ulysses Anisotropy Telescopes observations [PDF]

open access: yesAnnales Geophysicae, 2000
For the first time during the mission, the Anisotropy Telescopes instrument on board the Ulysses spacecraft measured constant zero anisotropy of protons in the 1.3-2.2 MeV energy range, for a period lasting more than three days.
S. Dalla   +5 more
doaj   +1 more source

Signatures of interplanetary transients behind shocks and their associated near-surface solar activity [PDF]

open access: yesAnnales Geophysicae, 1998
Interplanetary transients with particular signatures different from the normal solar wind have been observed behind interplanetary shocks and also without shocks.
S. Bravo, X. Blanco-Cano
doaj   +1 more source

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