Results 61 to 70 of about 7,600 (227)

Solar influences in the heliosphere: understanding coronal mass ejections and their associated magnetic clouds [PDF]

, 2011
Coronal mass ejections (CMEs) are large-scale explosions on the Sun that expel plasma and magnetic field into the heliosphere. The interplanetary counterparts of CMEs, termed interplanetary CMEs (ICMEs), are often directly observed by spacecraft ...
Steed, K.
core  

The long-term variability of cosmic ray protons in the heliosphere: A modeling approach

Journal of Advanced Research, 2013
Galactic cosmic rays are charged particles created in our galaxy and beyond. They propagate through interstellar space to eventually reach the heliosphere and Earth. Their transport in the heliosphere is subjected to four modulation processes: diffusion,
M.S. Potgieter, N. Mwiinga, S.E.S. Ferreira, R. Manuel, D.C. Ndiitwani   +4 more
doaj   +1 more source

Optimization Algorithm for Determining the Source Surface Radius Based on Parker Solar Probe In Situ Measurements From Encounters 1 to 19

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract The Potential Field Source Surface (PFSS) extrapolation is a method for estimating the large scale coronal magnetic field from photospheric magnetograms. The source surface serves as the outer boundary of its solution domain, and is typically a spherical surface.
Shiouhe Wang, Fang Shen, Yi Yang, Xueshang Feng, Jiansen He   +4 more
wiley   +1 more source

Real‐Time Prediction of Two Geomagnetic Storms Using Solar Orbiter as a Far Upstream Solar Wind Monitor

Space Weather, Volume 24, Issue 8, August 2026.
Abstract We present the first real‐time predictions of coronal mass ejection (CME) magnetic structure and resulting geomagnetic impact at Earth for two events using far‐upstream observations from Solar Orbiter during March 2024. While our approach assumes idealized conditions for CME propagation and scaling, in situ magnetic field data from upstream ...
Emma E. Davies, Eva Weiler, Christian Möstl, Satabdwa Majumdar, Hannah T. Rüdisser, Timothy S. Horbury, Helen O'Brien, Jean Morris, Alastair Crabtree   +8 more
wiley   +1 more source

The Heliosphere through the Solar Activity Cycle

, 2008
Understanding how the Sun changes though its 11-year sunspot cycle and how these changes affect the vast space around the Sun – the heliosphere – has been one of the principal objectives of space research since the advent of the space age.
Suess, Steven T, Balogh, André, Lanzerotti, Louis J   +2 more
core   +1 more source

Some Similarities and Differences Between the Observed Alfvénic Fluctuations in the Fast Solar Wind and Navier–Stokes Turbulence

Frontiers in Astronomy and Space Sciences, 2020
Using two long data sets analyzed on equal footing, the properties of Alfvénic fluctuations in the fast (coronal-hole-origin) solar wind and Navier–Stokes turbulence are compared.
Joseph E. Borovsky, Tiziano Mina, Tiziano Mina   +2 more
doaj   +1 more source

Predicting Coronal Mass Ejection Travel Times Using Enhanced Model‐Guided Machine Learning

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Coronal mass ejections (CMEs) are key drivers of space weather events, posing risks to both space‐borne and ground‐based systems. An accurate prediction of their arrival time at Earth is critical for impact mitigation. To this end, physics‐informed artificial intelligence (AI) approaches have proven more effective than purely data‐driven or ...
M. Lampani, M. Rossi, S. Guastavino, M. Piana, A. M. Massone   +4 more
wiley   +1 more source

Cosmic rays in the heliosphere [PDF]

, 1987
The different types of cosmic ray particles and their role in the heliosphere are briefly described. The rates of various energetic particles were examined as a function of time and used to derive various differential energy gradients.
Webber, William R.
core  

Ground‐Based Solar Radio Observations From the Mexican e‐Callisto Stations During the May 2024 Extreme Space Weather Events

Space Weather, Volume 24, Issue 8, August 2026.
Abstract The period from 1 to 14 May 2024 was marked by some of the most intense solar activity of Solar Cycle 25, including multiple X‐class flares, fast coronal mass ejections (CMEs), and diverse solar radio emissions. We present observations from the Mexican e‐Callisto network (REC‐Mx), including long‐duration continuum emissions (CTMs), Type II ...
E. Aguilar‐Rodriguez, G. Baron, R. Gutiérrez‐Zalapa, C. Y. Cruz‐Rodríguez, M. Rodriguez‐Martinez, M. A. Chacón, E. Romero‐Hernandez, K. S. Caballero‐Mora, J. Ramírez Vélez, E. Andrade‐Mascote, P. Villanueva‐Hernandez, I. A. Peralta‐Mendoza, J. Herrera, J. H. Castro‐Chacón, E. Perez‐Tijerina, J. A. Gonzalez‐Esparza, H. de León‐Hidalgo, R. Arceo‐Reyes, O. G. Morales‐Olivares, D. A. Garcia‐Sanchez, J. E. Perez‐Leon, C. Monstein, J. Bussons Gordo, M. Prieto Mateo   +23 more
wiley   +1 more source

The dynamical heliosphere [PDF]

Journal of Geophysical Research: Space Physics, 2003
The solar cycle induces substantial changes in the solar wind, which can have an important effect on the structure of the global heliosphere. In the ecliptic the ram pressure can vary from one cycle to the other, being greater during periods of minimum activity. We investigate the response of the heliosphere to a temporally varying solar wind.
G. P. Zank, H.‐R. Müller
openaire   +1 more source