Results 61 to 70 of about 652 (191)

On the solar origin of interplanetary disturbances observed in the vicinity of the Earth [PDF]

Annales Geophysicae, 2003
The solar origin of 40 interplanetary disturbances observed in the vicinity of the Earth between January 1997 and June 1998 is investigated in this paper.
N. Vilmer, M. Pick, R. Schwenn, P. Ballatore, J. P. Villain   +4 more
doaj   +1 more source

Global Three‐Dimensional Simulation of Magnetospheric Dynamics During the Extreme Geomagnetic Storm of 10–11 May 2024

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study presents a high‐resolution three‐dimensional global magnetohydrodynamic (MHD) simulation of the historic geomagnetic storm of 10–11 May 2024, using observational data for the ACE solar wind input. This extreme event was characterized by intense solar wind dynamic pressure (∼50 nPa) and exceptionally strong interplanetary magnetic ...
Kyung Sun Park
wiley   +1 more source

Characteristics of Solar Wind Density Depletions During Solar Cycles 23 and 24 [PDF]

Journal of Astronomy and Space Sciences, 2017
Solar wind density depletions are phenomena that solar wind density is rapidly decreased and keep the state. They are generally believed to be caused by the interplanetary (IP) shocks.
Keunchan Park, Jeongwoo Lee, Yu Yi, Jaejin Lee, Jongdae Sohn   +4 more
doaj   +1 more source

Features of Ground Level Enhancement (GLE #74) Event on 11 May 2024

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Ground Level Enhancement (GLE #74) occurred on 11 May 2024 following an X5.8 solar flare from active region AR 13668 and the associated halo coronal mass ejection. The event was observed by both ground‐based neutron monitors (NMs) and space‐borne instruments and occurred during a deep Forbush decrease and one of the strongest geomagnetic ...
Alexander Mishev, Nicholas Larsen, Sergey Koldobskiy, Hishashi Hayakawa, Yusuke Ebihara, Ilya Usoskin   +5 more
wiley   +1 more source

Electron Heating in 2D Particle-in-cell Simulations of Quasi-perpendicular Low-beta Shocks

The Astrophysical Journal
We measure the thermal electron energization in 1D and 2D particle-in-cell simulations of quasi-perpendicular, low-beta ( β _p = 0.25) collisionless ion–electron shocks with mass ratio m _i / m _e = 200, fast Mach number ${{ \mathcal M }}_{\mathrm{ms}}=1$
Aaron Tran, Lorenzo Sironi
doaj   +1 more source

Acceleration of an interplanetary shock through the magnetosheath: a global hybrid simulation

Frontiers in Astronomy and Space Sciences
According to most observations and simulations, interplanetary shocks slow down when they propagate through the magnetosheath. In this article, we present results from a self-consistent global hybrid PIC simulation of an interplanetary shock which, by ...
C. Moissard, C. Moissard, P. Savoini, D. Fontaine, R. Modolo   +4 more
doaj   +1 more source

Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations

The Astrophysical Journal, 2023
The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance ( r _h ), the plasma speed is found to increase at ∼34–40 km s ^−1 au ^−1 and the density ...
Rajkumar Hajra, Bruce T. Tsurutani, Gurbax S. Lakhina, Quanming Lu, Aimin Du, Lican Shan   +5 more
doaj   +1 more source

Impact angle control of interplanetary shock geoeffectiveness [PDF]

Journal of Geophysical Research: Space Physics, 2014
AbstractWe use Open Geospace General Circulation Model global MHD simulations to study the nightside magnetospheric, magnetotail, and ionospheric responses to interplanetary (IP) fast forward shocks. Three cases are presented in this study: two inclined oblique shocks, hereafter IOS‐1 and IOS‐2, where the latter has a Mach number twice stronger than ...
Oliveira, D. M., Raeder, J.
openaire   +2 more sources

Statistical Mapping of ULF Wave Power in the Vicinity of Earth's Bow Shock Using Cluster Magnetic Field Data

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Ultra‐low frequency (ULF) waves with frequencies 10–140 s are a characteristic feature of the foreshock, playing important roles in transient formation, shock reformation, and particle acceleration. We utilize 23 years of Cluster data to map ULF wave power and compressibility in the vicinity of Earth's bow shock, combining Cluster data with ...
R. L. Atkinson, H. Hietala, T. Karlsson, D. Manzini, D. Burgess   +4 more
wiley   +1 more source

High-resolution Observations of Pickup-ion-mediated Shocks to 60 au

The Astrophysical Journal
This study provides a detailed analysis of 14 distant interplanetary shocks observed by the Solar Wind Around Pluto instrument on board New Horizons.
Bishwas L. Shrestha, David J. McComas, Eric J. Zirnstein, George Livadiotis, Heather A. Elliott, Pontus C. Brandt, Alan Stern, Andrew R. Poppe, Joel Parker, Elena Provornikova, Kelsi Singer, Anne Verbiscer, New Horizons Heliophysics Team   +12 more
doaj   +1 more source