Results 71 to 80 of about 941 (201)

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

Reconstructing Historical Solar Indices for Predicting Past Space Weather Events

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Modeling and forecasting the near‐Earth space environment, specifically the thermosphere, is particularly important because it affects the motion of low‐Earth orbit objects through atmospheric drag. Solar indices such as F10.7, S10.7, M10.7, and Y10.7 are commonly used as inputs to ionospheric and thermospheric density models.
Poshan Belbase, Denny M. Oliveira, Theodosios Chatzistergos, Gangkai Poh, Eftyhia Zesta   +4 more
wiley   +1 more source

The Temperature and Emission Measure Distribution in the Quiet and Active Solar Corona: A Bayesian Approach

The Astrophysical Journal, 2022
Abstract The reconstruction of the differential emission measure (DEM) from observations of spectral line intensities provides information on the temperature distribution of the emission measure in the region observed. The inversion process is known to be highly unstable, and it has been necessary to provide additional constraints, such ...
openaire   +2 more sources

Natural Generation of Alfvén Waves from Three-dimensional Bursty Interchange Magnetic Reconnection in the Solar Corona

The Astrophysical Journal Letters
Alfvén waves play a significant role in solar coronal heating, solar wind acceleration, and Alfvénic turbulence formation. As a fundamental process, magnetic reconnection has long been credited as a crucial source of Alfvén waves.
Liping Yang, Jiansen He, Xueshang Feng, Daniel Verscharen, Fan Guo, Hui Li, Hui Tian, Wenya Li, Fang Shen, Chuanpeng Hou, Mijie Shi, Honghong Wu, Ming Xiong   +12 more
doaj   +1 more source

Relationship Between Foreshock Structures and Magnetosheath Jets

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Plasma structures with enhanced dynamic pressure know as jets are frequently observed in the magnetosheath. We examine a possible connection of these jets with structures reported in the foreshock like SLAMS or plasmoids. A statistical study of the relation of the upstream conditions and the occurrence rates of magnetosheath (MSH) jets and ...
N. Xirogiannopoulou, O. Goncharov, J. Šafránková, Z. Němeček   +3 more
wiley   +1 more source

Topological structure of the magnetic solar corona

, 2007
The solar corona is a highly complex and active plasma environment, containing many exotic phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright points.
Maclean, Rhona Claire
core  

Evidence for the photospheric excitation of incompressible chromospheric waves [PDF]

, 2013
Observing the excitation mechanisms of incompressible transverse waves is vital for determining how energy propagates through the lower solar atmosphere.
Shelyag, S., Morton, Richard, Morton, R. J., Verth, G., Shelyag, Sergiy, Morton, R.J., Erdélyi, Róbert, Erdelyi, R., Verth, Gary, Fedun, Viktor, Fedun, V.   +10 more
core   +1 more source

Ubiquitous Small-scale Extreme-ultraviolet Upflow-like Events above Network Regions Observed by the Solar Orbiter/Extreme Ultraviolet Imager

The Astrophysical Journal
Universal small-scale solar activity in the quiet region is suggested to be a potential source of solar wind and the upper solar atmosphere. Here, with the high-resolution 174 Å imaging observations from the Solar Orbiter/Extreme Ultraviolet Imager, we ...
Yadan Duan, Hechao Chen, Zhenyong Hou, Zheng Sun, Yuandeng Shen   +4 more
doaj   +1 more source

Mental Health Promotion Through Nursing Interventions Focused on Anxiety, Sleep and Well‐Being: A Scoping Review

International Journal of Mental Health Nursing, Volume 35, Issue 2, April 2026.
ABSTRACT Anxiety is more prevalent than other mental disorders and maintains a bidirectional relationship with sleep disturbances, negatively affecting well‐being and overall mental health. This scenario underscores the need to strengthen and qualify nursing practice in addressing these outcomes.
Louise Constancia de Melo Alves Silva, Samia Valeria Ozorio Dutra, Barbara Fernandes Ferreira, Yenifer Lizeth Gañan Rojas, Kauanny Vitoria Gurgel dos Santos, Carlos Jordão Assis de Silva, Hylarina Maria Montenegro Diniz Silva, Kátia Regina Barros Ribeiro, Daniele Vieira Dantas, Rodrigo Assis Neves Dantas   +9 more
wiley   +1 more source

PRELIMINARY RESULTS OF INTERFEROMETRIC OBSERVATIONS OF THE QUIET SUN AT THE FREQUENCIES 8 – 32 MHZ

Odessa Astronomical Publications, 2018
We studied a radio emission of the quiet Sun at decameter wavelengths to determine its angular dimensions. Observations were conducted using interferometers composed of antenna sections of the UTR-2 radio telescope.
V. A. Shepelev, V. N. Melnik, R. V. Vashchishin   +2 more
doaj   +1 more source