Results 71 to 80 of about 1,247 (219)

Magnetic Cloud and Its Interplanetary Shock Sheath as a Modulator of the Cosmic Ray Intensity [PDF]

Journal of Astronomy and Space Sciences, 2008
Forbush Decreases (FDs) are representative events of abrupt decrease in galactic cosmic ray intensity. They are known to be strongly associated with solar wind events such as interplanetary shock (IP shock) and magnetic cloud (MC).
Su Yeon Oh
doaj   +1 more source

The May 2024 Superstorm Coronal Mass Ejections as Observed by the Psyche Gamma‐Ray and Neutron Spectrometer

Space Weather, Volume 24, Issue 5, May 2026.
Abstract We report new measurements of high‐energy protons ejected by the sun during the May 2024 Ganon superstorm. Our observations were made by the Neutron Spectrometer (NS) on the Psyche spacecraft, which was located at a solar distance of approximately 2 AU and a Sun‐Earth‐Probe separation angle of 75°.
Madison Liebel, Patrick N. Peplowski, David J. Lawrence, Insoo Jun   +3 more
wiley   +1 more source

Transport of Solar Wind Fluctuations: A Two-Component Model

, 2011
We present a new model for the transport of solar wind fluctuations which treats them as two interacting incompressible components: quasi-two-dimensional turbulence and a wave-like piece.
Matthaeus, William H., P. A. Isenberg, Breech, B., Isenberg, P. A., Matthaeus, W. H., C. W. Smith, Smith, C. W., Oughton, Sean, S. Oughton, Smith, Charles W., W. H. Matthaeus, Oughton, S., B. Breech, Breech, Ben   +13 more
core   +1 more source

GIC‐Related Observations During the May 2024 Geomagnetic Storm in the United States

Space Weather, Volume 24, Issue 5, May 2026.
Abstract The May 2024 geomagnetic storm was one of the most severe in the past 20 years. Understanding how large geomagnetic disturbances (GMDs) impact geomagnetically induced currents (GICs) within electrical power grid networks is key to ensuring their resilience.
L. A. Wilkerson, R. S. Weigel, D. Thomas, D. Bor, E. J. Oughton, C. T. Gaunt, C. C. Balch, M. J. Wiltberger, A. Pulkkinen   +8 more
wiley   +1 more source

Parker Solar Probe Observations of Turbulence and Waves between a Current Sheet and an Interplanetary Coronal Mass Ejection–Driven Shock

The Astrophysical Journal
We report on unusual magnetic wave activity seen in a region between the crossing of a current sheet and an interplanetary shock by the Parker Solar Probe (PSP).
Juan Zhang, Joe Giacalone, Xiaohang Chen, Lan K. Jian, Kristopher G. Klein   +4 more
doaj   +1 more source

Relating Intermittency and Inverse Cascade to Stochastic Entropy in Solar Wind Turbulence

The Astrophysical Journal Letters, 2023
Turbulent energy transfer in nearly collisionless plasmas can be conceptualized as a scale-to-scale Langevin process. Hence, the statistics of magnetic field fluctuations can be embedded in the framework of stochastic process theory.
Mirko Stumpo, Simone Benella, Tommaso Alberti, Oreste Pezzi, Emanuele Papini, Giuseppe Consolini   +5 more
doaj   +1 more source

Validating a Non‐Conventional Method for Expansion of Coronal Mass Ejections (CMEs) and Investigating the Evolution of a CME Substructures Using Solar Orbiter and Wind Observations

Space Weather, Volume 24, Issue 5, May 2026.
Abstract We present a validation of our recently proposed non‐conventional method, Constant Acceleration Accounted Perspective (CAAP), for estimating the instantaneous expansion speed of coronal mass ejection (CMEs), even when only single‐point in situ observations are available. This validation is enabled by the radial alignment of Solar Orbiter (SolO)
Anjali Agarwal, Wageesh Mishra, Mathew J. Owens, Tanja Amerstorfer   +3 more
wiley   +1 more source

Anisotropic three-dimensional MHD turbulence

, 1996
Direct spectral method simulation of the three-dimensional magnetohydrodynamics (MHD) equations is used to explore anisotropy that develops from initially isotropic fluctuations as a consequence of a uniform applied magnetic field.
Matthaeus, William H., Oughton, Sean, Roberts, D. Aaron, Ghosh, Sanjoy, William H. Matthaeus, D. Aaron Roberts, Sanjoy Ghosh, Sean Oughton   +7 more
core   +1 more source

A Robust Empirical Relationship Between Speed and Turbulence Energy in the Near‐Earth Solar Wind

Space Weather, Volume 24, Issue 5, May 2026.
Abstract The connection between turbulence and solar‐wind acceleration, long known in space physics, is further developed in this study by establishing a robust empirical law that relates the bulk‐flow speed to the magnetohydrodynamic‐scale fluctuation energy in the plasma. The model is based on analysis of 25 years of near‐Earth observations by NASA's
Rohit Chhiber, Yanwen Wang, Manuel E. Cuesta, Jiaming Wang, Sohom Roy   +4 more
wiley   +1 more source

Updates, Examples and Validation of the Global Ionosphere Thermosphere Model

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study provides an updated description, example simulations, and validation of the Global Ionosphere Thermosphere Model (GITM). The updates to GITM include using an exothermic semi‐implicit chemistry scheme that no longer requires an altitude dependent heating efficiency; an ionospheric wind‐driven dynamo; improved neutral, ion, and ...
A. J. Ridley, C. Wu, A. Bukowski, J. Bell   +3 more
wiley   +1 more source