Results 81 to 90 of about 10,701,163 (203)

Comparison between variations in solar UV radiation and sunspot parameters with Mg II daily index as a proxy

Physics Open
Solar UV radiation influence the Earth's climate and upper atmosphere. The UV emission from the Sun modulates with the sunspot cycle with an 11-year periodicity.
(G) Chandrika, Belur Ravindra, Vijay Kumar Doddamani   +2 more
doaj   +1 more source

PROSWIN: Probabilistic Solar Wind Speed Forecasting Using Deep Distributional Regression From Solar Images

AGU Advances, Volume 7, Issue 8, November 2026.
Abstract Accurately predicting fast solar wind conditions is challenging, as uncertainties are large and unquantified by traditional single‐value prediction models. In particular, the risks of high‐speed solar wind streams (HSSs), which can cause damage to technological infrastructure, cannot be reliably assessed without probabilistic forecasts.
Daniel Collin, Yuri Shprits, Luca Chiarabini, Stefan J. Hofmeister, Nadja Klein, Guillermo Gallego   +5 more
wiley   +1 more source

On the Magnetic Field Evolution of Interplanetary Coronal Mass Ejections from 0.07 to 5.4 au

The Astrophysical Journal
A central question for understanding interplanetary coronal mass ejection (ICME) physics and improving space weather forecasting is how ICMEs evolve in interplanetary space.
Christian Möstl, Emma E. Davies, Eva Weiler, Hannah T. Rüdisser, Ute V. Amerstorfer, Andreas J. Weiss, Martin A. Reiss, Satabdwa Majumdar, Timothy S. Horbury, Stuart D. Bale, Daniel Heyner   +10 more
doaj   +1 more source

Dynamical Solar Wind Forecasting Using In Situ Solar Wind Speed Observations

Space Weather, Volume 24, Issue 11, November 2026.
Abstract Accurate prediction of the ambient solar wind at Earth is a key requirement for space‐weather forecasting but is limited by uncertainties in coronal boundary conditions and, to a lesser extent, heliospheric transport. We present a quantitative assessment of a solar wind forecast that uses near‐Earth in situ solar wind observations to estimate ...
M. J. Owens, L. A. Barnard, H. Turner, C. N. Arge   +3 more
wiley   +1 more source

Multi-instrument observations and tracking of a coronal mass ejection front from low to middle corona

Journal of Space Weather and Space Climate
The shape and dynamics of coronal mass ejections (CMEs) vary significantly based on the instrument and wavelength used. This has led to significant debate about the proper definitions of CME/shock fronts, pile-up/compression regions, and core ...
Stepanyuk Oleg, Kozarev Kamen
doaj   +1 more source

Radio Sounding Determination of Two‐Dimensional Plasma Structure Velocity

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The Mars spacecraft Tianwen‐1 transmitted radio signals to Earth for its orbit determination. The frequencies of the radio signals exhibited sharp variations when an ICME passed through the Mars‐Earth signal path on 18 June 2021. These sharp variations were observed at different ground stations at different times. This was most probably caused
Qingbao He, Qinghui Liu, Yongzhang Yang
wiley   +1 more source

Intensity of emission lines of the quiescent solar corona: comparison between calculated and observed values

Solar-Terrestrial Physics, 2018
The paper reports the results of calculations of the center-to-limb intensity of optically thin line emission in EUV and FUV wavelength ranges. The calculations employ a multicomponent model for the quiescent solar corona.
Krissinel B.B.
doaj   +1 more source

Time-dependent Hinode/EIS Atlas of a Coronal Mass Ejection Containing Cool Material

The Astrophysical Journal
We report the first time-dependent spectral atlas of a coronal mass ejection (CME) observed by the Hinode/Extreme Ultraviolet Imaging Spectrometer (EIS).
E. M. Wraback, E. Landi, W. B. Manchester   +2 more
doaj   +1 more source

Use of the Moon to Distinguish the F from the K Corona Using a Rocket Coronagraph During an Eclipse [PDF]

, 1965
F and K corona observations by rocket coronagraph during solar ...
Mc Cullough, R. E., Seal, R. T., Jr., Koomen, M. J., Tousey, R.   +3 more
core  

Near-Sun observations of an F-corona decrease and K-corona fine structure [PDF]

, 2019
peer reviewedRemote observations of the solar photospheric light scattered by electrons (the K-corona) and dust (the F-corona or zodiacal light) have been made from the ground during eclipses1 and from space at distances as small as 0.3 astronomical ...
Rouillard, Alexis P., Liewer, Paulette C., Lamy, Philippe L., Plunkett, Simon P., Higginson, Aleida K., Howard, Russell A., Raouafi, Nour Eddine, Hess, Phillip, Linker, Jon A., Socker, Dennis G., Viall, Nicholeen M., Colaninno, Robin C., Vourlidas, Angelos, Linton, Mark G., Hall, Jeffrey R., Penteado, P., DeForest, Craig E., Thernisien, Arnaud F. R., Poirier, N., Korendyke, Clarence M., Bothmer, Volker, Gallagher, B., Kouloumvakos, Athanasios, Rochus, Pierre, Rich, Nathan B., Stenborg, Guillermo Adrian, N. M. Viall, Kouloumvakos, A., Colaninno, R C, Kouloumvakos, A, Lamy, P L, Liewer, P C, Stenborg, G., Linton, M, P. L. Lamy, C. E. DeForest, R. C. Colaninno, A. F. Thernisien, Howard, R. A., Bothmer, V., Rouillard, A. P., Penteado, P, Rochus, P., J. R. Hall, Viall, N M, Thernisien, A F, C. M. Korendyke, Hall, J R, P. C. Liewer, DeForest, C E, Lamy, P. L., Poirier, N, M. Linton, Deforest, C. E., Higginson, A K, Linton, M., Plunkett, S. P., Higginson, A. K., Liewer, P. C., Howard, R A, D. G. Socker, Colaninno, R. C., Gallagher, B, Linker, J., Lamy, Philippe, B. Gallagher, A. Vourlidas, Vourlidas, A., Raouafi, N. E., Linker, J, Rich, N., Korendyke, C M, Hess, P., A. P. Rouillard, N. Poirier, Korendyke, C. M., Viall, N. M., V. Bothmer, R. A. Howard, P. Hess, S. P. Plunkett, Socker, D G, Rich, Nathan, J. Linker, N. Rich, G. Stenborg, Hall, J. R., Socker, D. G., Raouafi, N E, A. Kouloumvakos, P. Penteado, Hesse, P., N. E. Raouafi, P. Rochus, Thernisien, A. F., A. K. Higginson   +95 more
core   +1 more source