Results 1 to 10 of about 20,985 (231)
Formation of a strong southward IMF near the solar maximum of cycle 23 [PDF]
Annales 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 +5 more sources
interplanetary magnetic field [PDF]
Nature, 2011 In 1974 a number of observations of the magnetic field at about 1 AU were already available and the concept of coronal magnetic field expansion in the heliosphere well established. On the other hand, only a few, sporadic, in situ field observations were available at heliocentric distances significantly inside the terrestrial orbit.
Franco Mariani, Fritz M. Neubauer
+6 more sources
The Astrophysical Journal, 2023 In this work, we extend Leighton’s diffusion model describing the turbulent mixing of magnetic footpoints on the solar wind source surface. The present Lagrangian stochastic model is based on the spherical Ornstein–Uhlenbeck process with drift that is ...
Gang Li, N. H. Bian
doaj +1 more source
Relationship of Transport Coefficients with Statistical Quantities of Charged Particles
The 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
Energetics of Shock-triggered Supersubstorms (SML < −2500 nT)
The Astrophysical Journal, 2023 The solar wind energy input and dissipation in the magnetospheric–ionospheric systems of 17 supersubstorms (SSSs: SML < −2500 nT) triggered by interplanetary shocks during solar cycles 23 and 24 are studied in detail. The SSS events had durations ranging
Bruce T. Tsurutani, Rajkumar Hajra
doaj +1 more source
Are Switchback Boundaries Observed by Parker Solar Probe Closed?
The Astrophysical Journal, 2023 Switchbacks are sudden and large deflections in the magnetic field that Parker Solar Probe frequently observes in the inner heliosphere. Their ubiquitous occurrence has prompted numerous studies to determine their nature and origin.
Nina Bizien +9 more
doaj +1 more source
Does Magnetic Reconnection Occur in the Near Lunar Surface Environment?
Geophysical Research Letters, 2023 The near lunar surface contains small‐scale magnetic field structures that provide a natural test bed for observing plasmas with a non‐zero Hall electric field, as well as potentially facilitating electron‐only reconnection.
R. P. Sawyer +7 more
doaj +1 more source
The Astrophysical Journal, 2023 Planar magnetic structures (PMSs), characterized by interplanetary magnetic field vectors remaining parallel to a specific plane, are commonly observed in the solar wind, especially in the sheath region of interplanetary coronal mass ejections (ICMEs ...
Mengsi Ruan +9 more
doaj +1 more source
Case studies of space weather events from their launching on the Sun to their impacts on power systems on the Earth [PDF]
Annales Geophysicae, 2002 Active geomagnetic conditions on 12–13, 15–16, and 22–23 September 1999 resulted in geomagnetically induced currents (GIC) measurable in power systems in Canada and the United States.
H.-L. Lam +3 more
doaj +1 more source
Magnetic field line lengths inside interplanetary magnetic flux ropes [PDF]
Journal of Geophysical Research: Space Physics, 2015 AbstractWe report on the detailed and systematic study of field line twist and length distributions within magnetic flux ropes embedded in interplanetary coronal mass ejections (ICMEs). The Grad‐Shafranov reconstruction method is utilized together with a constant‐twist nonlinear force‐free (Gold‐Hoyle) flux rope model to reveal the close relation ...
Qiang Hu, Jiong Qiu, Sam Krucker
openaire +2 more sources