Results 141 to 150 of about 78,655 (291)

Statistical Study of Short Large‐Amplitude Magnetic Structures at Mars Observed by MAVEN

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract We present a statistical study of Short Large‐Amplitude Magnetic Structures (SLAMS) in the Martian foreshock using data from the Mars Atmosphere and Volatile Evolution (MAVEN) mission between 01 January 2015 and 31 December 2019. We have identified 21,008 SLAMS during this time interval and statistical results are presented on the SLAMS ...
Tsz Kiu Wong Chan, Tomas Karlsson, Sofia Bergman   +2 more
wiley   +1 more source

Cross-field Diffusion Effects on Particle Transport in a Solar Coronal Flux Rope

The Astrophysical Journal Letters
Solar energetic particles associated with solar flares and coronal mass ejections (CMEs) are key agents of space weather phenomena, posing severe threats to spacecraft and astronauts.
Edin Husidic, Nicolas Wijsen, Luis Linan, Michaela Brchnelova, Rami Vainio, Stefaan Poedts   +5 more
doaj   +1 more source

Juno Observations of Large‐Scale Azimuthal Fields and Flows in Jupiter's Nightside Magnetosphere: Field‐Aligned Currents, Effective Ionospheric Pedersen Conductivity, and Power to Atmospheric Heating

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Using the methodology of Cowley et al. (https://doi.org/10.1029/2025JA033993), we employ ∼8 years of Juno azimuthal magnetic field data to derive colatitude profiles of Jupiter's nightside (17‐05 hr via midnight) ionospheric equatorward Pedersen current from near the magnetic pole to inner magnetosphere field lines at 18° colatitude, from ...
G. Provan, S. W. H. Cowley, J. D. Nichols, J.‐Z. Wang, R. J. Wilson   +4 more
wiley   +1 more source

Joule Heating in the Northern Hemisphere During Geomagnetic Storms Driven by High‐Speed Streams and Coronal Mass Ejections

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract We present a robust method for estimating the auroral Joule heating in the northern hemisphere by combining SuperMAG, SuperDARN and AMPERE data products. This method is applied to 292 storms during 2010–2023. Temporal evolution and spatial distributions of the storm‐time Joule heating are studied using a superposed epoch analysis, with the ...
H. Vanhamäki, M. Pedersen, A. Aikio, C. Waters, J. Gjerloev, L. Cai, M. Myllymaa, B. Kunduri, K. Sterne, S. Vines, B. Anderson   +10 more
wiley   +1 more source

A Statistical Analysis of the Wave‐Particle Dynamics Near the Kennel‐Petschek Limit

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract This study investigates how electron fluxes and chorus waves behave relative to the Kennel–Petschek (K‐P) flux limit using 7 years of Van Allen Probes observations. We combine spatial statistics of when the K‐P limit is exceeded, energy‐dependent flux–wave relationships, and frequency‐resolved chorus spectra to provide a more comprehensive ...
S. D. Walton, I. Thomas, L. Olifer
wiley   +1 more source

Global Ionospheric TEC Variability: Long‐Term Spectral–Wavelet Analysis and Geomagnetic Storm Event Case Studies

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract This study investigates global ionospheric variability using Global Total Electron Content (GTEC), defined as the spatial average of daily averaged Global Ionospheric Maps derived from the International GNSS Service. The analysis spans from 2010 to 2024, covering Solar Cycle 24 and the rising phase of Solar Cycle 25, and incorporates ...
Ramadane Hamed Linjouom Nsangou, Y. Reuveni   +1 more
wiley   +1 more source

Modeling Ganymede's Surface Charging in Preparation for the JUICE Mission

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The European Space Agency's (ESA) JUICE mission (JUpiter ICy moons Explorer) is en route to the Jovian system to characterize Ganymede's subsurface ocean. Determining the ocean's conductivity and depth requires precise measurements of its induced magnetic field at the position of JUICE.
Betty Pei‐Chun Tsai, Elias Roussos, Ronan Modolo, Mika K. G. Holmberg, Xianzhe Jia, Tom Nordheim, Sachin Alexander Reddy, Norbert Krupp, Markus Fränz, Yasuhito Narita, Christina Plainaki   +10 more
wiley   +1 more source

Polarization Measurements and Source Locations of Saturn Electrostatic Discharges During the Voyager Era

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract A Saturn Electrostatic Discharge or SED is an intense electromagnetic impulse induced by Saturn lightning, which escapes into space through the magnetoplasma of the ionosphere. Since previous SED polarizations from Voyager data are inconclusive, this polarization study is the first which properly considers the characteristics of the Voyager ...
Masafumi Imai, Georg Fischer, Ulrich Taubenschuss, Ivana Kolmašová, Ondřej Santolík, David Píša   +5 more
wiley   +1 more source

High-energy γ-photons and pair electrons generation in polarized ultraintense laser fields. [PDF]

Sci Rep
Agarwal S, Gupta DN.
europepmc   +1 more source

In Situ Carbonation of Sedimentary and Igneous Rocks of Ultramafic Composition in Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Over 3.5 years of exploration in Jezero Crater, the Perseverance rover has explored several geological units of diverse origins and natures, performing multi‐technique remote analyses of the chemistry and mineralogy of rocks with the SuperCam instrument suite.
E. Clavé, O. Beyssac, P. Beck, C. Royer, L. Mandon, N. Mangold, O. Forni, E. Dehouck, C. Bedford, A. Udry, S. Schröder, S. Bernard, C. Quantin‐Nataf, M. Loche, J. Aramendia, A. Brown, G. Caravaca, E. Cardarelli, L. Coloma, S. A. Connell, T. Fouchet, J. R. Johnson, G. Lopez‐Reyes, J. M. Madariaga, J. A. Manrique, S. Maurice, P.‐Y. Meslin, S. Le Mouélic, A. M. Ollila, P. Pilleri, C. Pilorget, K. Rammelkamp, F. Seel, J. I. Simon, U. Wolf, A. Zastrow, S. Clegg, O. Gasnault, R. C. Wiens, A. Cousin   +39 more
wiley   +1 more source