Results 101 to 110 of about 27,056 (231)

Collisionless Shocks as a Diagnostic Tool for Understanding Energetic Particle Transport in Space Plasmas

Frontiers in Astronomy and Space Sciences, 2020
We study the transport of energetic particles accelerated at three different shock events observed in the solar wind by the ACE spacecraft. We consider particle propagation for a quasi-parallel, an oblique, and a quasi-perpendicular shock.
Gaetano Zimbardo, Gaetano Zimbardo, Giuseppe Prete, Silvia Perri   +3 more
doaj   +1 more source

The Interface between the Outer Heliosphere and the Inner Local ISM: Morphology of the Local Interstellar Cloud, Its Hydrogen Hole, Strömgren Shells, and 60Fe Accretion [PDF]

Astrophysical Journal, 2019
We describe the interface between the outer heliosphere and the local interstellar medium (LISM) surrounding the Sun. The components of the inner LISM are the four partially ionized clouds (the Local Interstellar Cloud (LIC), G cloud, Blue cloud, and Aql
J. Linsky, S. Redfield, D. Tilipman
semanticscholar   +1 more source

Mercury's Altered Magnetosphere During a Sub‐Alfvénic ICME Event: MESSENGER Observations and Inferred Asymmetric Alfvén Wing Formation From Global MHD Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract We present observations of a rare configuration of Mercury's magnetosphere in response to sub‐Alfvénic upstream conditions, driven by an interplanetary coronal mass ejection (ICME) that impacted the planet on 1 May 2013. Using data from the Mercury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) spacecraft, supported by a ...
Charles F. Bowers, Caitríona M. Jackman, Xianzhe Jia, Lina Z. Hadid, Weijie Sun, Laura A. Hayes, Ryan M. Dewey, Brandon Burkholder, Daragh M. Hollman, Sebastian Cervantes, Hans L. F. Huybrighs, Matthew J. Rutala   +11 more
wiley   +1 more source

Spatial Variability and Correlation Lengths Within Stream Interaction Regions at 1 au: Comparison Between ACE and Wind

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Understanding the spatial variability and correlation lengths throughout Stream Interaction Regions (SIRs) has importance both for fundamentally understanding the structuring of the solar wind and SIRs and for space weather operations. SIR observations from Advanced Composition Explorer and Wind are utilized to characterize the spatial ...
R. C. Allen, V. Toy‐Edens, S. K. Vines, S. Eriksson, J. M. Raines, S. Lepri, G. Li, Y. Wu, A. Russell, G. C. Ho   +9 more
wiley   +1 more source

Oblique Compressible Waves in the Reconnection Exhaust Region Embedded in the Inner Heliospheric Current Sheet Observed by Parker Solar Probe

The Astrophysical Journal
Magnetic reconnection is an important physical process of energy conversion in the heliosphere. Parker Solar Probe (PSP) passes through current sheets of the inner heliosphere and is likely to encounter magnetic reconnection events there. PSP traversed a
Rui Zhuo, Jiansen He, Die Duan, Xingyu Zhu, Chuanpeng Hou   +4 more
doaj   +1 more source

Heliospheric consequences of solar activity in geophysical and interplanetary phenomena

Geofísica Internacional, 2004
We have done an analysis of the total solar magnetic flux, polar coronal hole area and sunspots. We investigate their long term evolution over several solar cycles and their possible relationship with interplanetary shocks, sudden storm commencements at ...
J. F. Valdés Galicia, A. Lara, D. Maravilla   +2 more
doaj   +1 more source

A Compact Ion‐Electron Plasma Camera Spectrometer With an Instantaneous Hemispheric Field of View

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Using additive manufacturing and a selective metalization technique, we have developed a compact ion/electron plasma camera based on the donut topology. With its instantaneous field of view of 2πsr $2{\uppi }\mathrm{s}\mathrm{r}$, it eliminates the need for electrostatic deflectors.
Gwendal Hénaff, Matthieu Berthomier, Frédéric Leblanc, Jean‐Denis Techer, Yvan Alata, Carla Costa   +5 more
wiley   +1 more source

Solar Flare Activity, 1937–2024: Introducing the New Hemispheric Solar Flare Index (hSFI) in the Context of 2024's Major Solar Storm Events

Space Weather, Volume 23, Issue 11, November 2025.
Abstract A new daily composite of the solar flare index (SFI) and the hemispherically‐resolved versions (hSFI) are presented for 1937 to 2024. The data set confirms that the northern hemisphere (NH) dominated solar flare activity during Solar Cycles 17 to 21, but that the southern hemisphere has dominated from Solar Cycle 22 to present.
V. M. Velasco Herrera, W. Soon, S. Knoška, A. Özgüç, G. Velasco Herrera, H. Yeşilyaprak, N. Babynets, M. Švanda, J. Muraközy, S. Qiu, D. Riveros‐Rosas, R. Connolly, M. Connolly, A. Tlatov, L. Cappellotto   +14 more
wiley   +1 more source

Probing the Length of the Heliospheric Tail with Energetic Neutral Atoms (ENAs) from 0.52 to 80 keV

The Astrophysical Journal Letters, 2023
The shape of the heliosphere is currently under active debate. Energetic neutral atoms (ENAs) offer the best method for investigating the global structure of the heliosphere.
M. Kornbleuth, M. Opher, K. Dialynas, G. P. Zank, B. B. Wang, I. Baliukin, M. Gkioulidou, J. Giacalone, V. Izmodenov, J. M. Sokół, M. A. Dayeh   +10 more
doaj   +1 more source

Inter‐Solar‐Cycle Variability of Extreme Geomagnetic Storms

Space Weather, Volume 23, Issue 11, November 2025.
Abstract The occurrence of extreme space weather events, and, in particular, severe geomagnetic storms, while rare, can result in disproportionately large societal consequences. Accurate estimates of their likelihood over the timescale of a solar cycle or longer can provide crucial and actionable information for policymakers.
Pete Riley, M. Ben‐Nun
wiley   +1 more source