Results 101 to 110 of about 43,284 (218)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract The objective of the present study is to investigate solar wind‐magnetosphere‐ionosphere coupling (SWMIC) under intense external driving in terms of dayside ground magnetic disturbances. Dayside magnetic reconnection drives a region‐1 sense current system, the SWMIC current system.
Shinichi Ohtani
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The Astrophysical JournalLarge-amplitude decaying kink oscillations of coronal loops are strongly influenced by nonlinear processes such as Kelvin–Helmholtz instability (KHI) and turbulence, although comprehensive theoretical understanding and observational confirmation remain ...
Sihui Zhong +2 more
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How Does the Definition of a Geomagnetic Storm Affect the Contents of the Resulting Storm List?
Space Weather, Volume 24, Issue 5, May 2026.Abstract A geomagnetic storm is a significant and prolonged disturbance of the Earth's magnetic field caused by an enhancement of the ring current. Storms are typically identified using magnetic field measurements from multiple ground‐based magnetometers, and the corresponding dates and times of multiple storms can be collated to form a storm list ...
Atlas M. Patrick +6 more
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Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling
The Astrophysical JournalPotential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes.
Stephan G. Heinemann +2 more
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Predicting CME Arrivals From L5 Heliospheric Imagers: The Impact of HI Track Length
Space Weather, Volume 24, Issue 5, May 2026.Abstract The Solar TErrestrial RElations Observatory (STEREO) mission has laid a foundation for advancing real‐time space weather forecasting by enabling the evaluation of heliospheric imager (HI) data for predicting coronal mass ejection (CME) arrivals at Earth.
T. Amerstorfer +7 more
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Reduced Thermal Conduction in Solar Coronal Loops
The Astrophysical JournalThermal conduction plays an important role in the energy balance of the solar coronal plasma. In this paper, we present a new method for deriving observational constraints on the density–temperature relationship for coronal loops from the differential ...
M. Asgari-Targhi, A. A. van Ballegooijen
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Gravitational steady states of solar coronal loops
Physics of Plasmas, 2017 Coronal loops on the surface of the sun appear to consist of curved, plasma-confining magnetic flux tubes or “ropes,” anchored at both ends in the photosphere. Toroidal loops carrying current are inherently unstable to expansion in the major radius due to toroidal-curvature-induced imbalances in the magnetic and plasma pressures.
Linda E. Sugiyama, M. Asgari-Targhi
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The Astrophysical JournalWe investigate the thermal properties of a solar flare by the observations of the soft X-ray Telescope on board Hinode and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory. Our analysis reveals a tenuous but hot plasma cloud
Xiaoyan Xie +7 more
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On the Intermittency of Hot Plasma Loops in the Solar Corona
The Astrophysical JournalA recent analysis has suggested that the heating of plasma loops in the solar corona depends not just on the Poynting flux but also on processes yet to be identified.
Philip G. Judge, N. Paul M. Kuin
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Tearing modes in solar coronal loops
The Astrophysical Journal, 1990 It is shown that solar coronal-like magnetic loops, that is loops emerging from and reentering heavy plasma, are unstable to tearing modes. In particular, the previously made assumption of line tying to the heavy plasma, resulting in stabilization, is shown to be inapplicable because the growth rate is sub-Alfvenic in the entire loop, including the ...
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