Results 91 to 100 of about 1,308 (218)

Impacts of Ionospheric Conductance During the December 2021 Solar Eclipse on the Coupled Magnetosphere‐Ionosphere‐Thermosphere System

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Solar eclipses provide unique opportunities to investigate geospace dynamics driven by rapid, localized reductions in solar radiation. On December 4th $4\text{t}\text{h}$, 2021, a total solar eclipse occurred over West Antarctica during substorms.
Yu Hong, Yue Deng, Daniel T. Welling, Aaron J. Ridley, Gang Lu, Astrid Maute, Qingyu Zhu, Sebastijan Mrak, Colin Waters, Cheng Sheng, Minjing Li, Ramon Lopez   +11 more
wiley   +1 more source

Foreshock Ion Properties at Earth's Bow Shock: Dependence on Upstream Conditions and Shock Geometry

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Solar wind ion reflection at collisionless shocks regulates foreshock plasma dynamics, yet the quantitative dependence of foreshock ion properties on upstream and shock‐related parameters remains unclear, causing difficulties in predicting foreshock disturbances.
Runyi Liu, Terry Liu, Kun Zhang, Vassilis Angelopoulos, Siqi Zhao   +4 more
wiley   +1 more source

Velocity-space Turbulent Cascade in the Near-Sun Solar Wind: First Insights from the Parker Solar Probe Mission

The Astrophysical Journal Letters
In space plasmas, the rarity of collisions leads to complex structures in the velocity space where a turbulent cascade of the velocity distribution function (VDF) fluctuations is thought to occur.
A. Larosa, O. Pezzi, T. Bowen, L. Sorriso-Valvo, N. Sioulas, F. Pucci, D. Trotta, J. L. Verniero, R. Livi, S. Bharati Das, A. Chasapis, D. Perrone, F. Valentini, S. Servidio   +13 more
doaj   +1 more source

Ray Tracing Method in a General Non‐Dipole Magnetic Field

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We present a new general mathematical formulation of the Eikonal equations for ray tracing, which can use any internal magnetic field model. The analytical and tractable expressions are conveniently based on a vector formalism, which is independent of any coordinate system.
P.‐L. Blelly, J.‐F. Ripoll, A. Dubois, R. B. Horne, A. Marchaudon   +4 more
wiley   +1 more source

Refinement of Global Coronal and Interplanetary Magnetic Field Extrapolations Constrained by Remote-sensing and In Situ Observations at the Solar Minimum

The Astrophysical Journal
Solar magnetic fields are closely related to various physical phenomena on the Sun, which can be extrapolated with different models from photospheric magnetograms.
Guanglu Shi, Li Feng, Beili Ying, Shuting Li, Weiqun Gan   +4 more
doaj   +1 more source

Dayside Polar Cap Aurora and Their Connection to NBZ Currents

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract During northward interplanetary magnetic field (IMF) conditions, magnetic reconnection between the Earth's magnetosphere and the IMF takes place on high latitudes, causing the auroral oval to contract. During those times several auroral structures may appear inside the polar cap, such as cusp aurora, high latitude dayside aurora (HiLDA) and ...
Maria Chloi Katrougkalou, Anita Kullen, Lei Cai, Lorenz Roth, Yongliang Zhang   +4 more
wiley   +1 more source

Cusp Ion Dispersions and Their Relation to the Dayside Magnetic Reconnection Location: TRACERS First Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract A key process in solar‐terrestrial interactions is magnetic reconnection at the magnetopause. In addition to in situ observations of plasma entry at the magnetopause, some of the important global aspects of magnetic reconnection are addressed using plasma observations in the Earth's magnetospheric cusp region. Ions injected at the magnetopause
K. J. Trattner, S. M. Petrinec, S. A. Fuselier, J. W. Bonnell, S. R. Bounds, B. L. Burkholder, I. H. Cairns, L.‐J. Chen, I. W. Christopher, H. K. Connor, J. C. Dorelli, R. G. Gomez, K. Goodrich, B. Michotte de Welle, D. M. Miles, M. Oieroset, J. S. Halekas, S. A. Henderson, G. Hospodarsky, J. Labelle, S. L. Soni, R. Strangeway, D. Sur   +22 more
wiley   +1 more source

Low Frequency Extensions of Cyclotron Maser Instability‐Generated Radio Emission: A Statistical View From Cassini at Saturn

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The Cassini spacecraft spent 13 years orbiting Saturn, quasi‐continuously measuring Saturn's radio emissions. One of the key elements of the radio spectrum at Saturn is the Saturn Kilometric Radiation (SKR), and several studies have been written on events called Low Frequency Extensions (LFEs) which represent strong, continuous extensions of ...
C. M. Jackman, A. R. Fogg, S. W. H. Cowley, G. Provan, H. Adamski, N. M. Besch, D. M. Hollman, S. Walker, M. J. Rutala, L. Lamy, C. K. Louis, E. P. O’Dwyer   +11 more
wiley   +1 more source

The Species‐ and Energy‐Dependent Effects of EMIC Waves on Ring Current Ions

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Wave‐particle interactions are a major mechanism responsible for dissipating energy and redistributing particles within geospace. This study investigates the effects of electromagnetic ion cyclotron waves on ring current ions. We present a case study of the effects of EMIC waves on the ring current during the 15 August 2015 geomagnetic storm ...
Cristian P. Ferradas, Suk‐Bin Kang, Mei‐Ching Fok, Gonzalo Cucho‐Padin, Maria Usanova, Bhanu Remya   +5 more
wiley   +1 more source

Temporal Evolution of Sunspot Groups and Increase in the Open Flux during Solar Maximum in Cycle 24

The Astrophysical Journal
The evolution of the global solar magnetic field directly impacts the interplanetary magnetic field (IMF). During the solar maximum of Cycle 24, the monthly averaged IMF strength doubled over five Carrington rotations (CRs) in late 2014.
Minami Yoshida, Toshifumi Shimizu, Shin Toriumi, Haruhisa Iijima   +3 more
doaj   +1 more source