Results 11 to 20 of about 916,158 (245)

In situ local shock speed and transit shock speed [PDF]

open access: yesAnnales Geophysicae, 1998
A useful index for estimating the transit speeds was derived by analyzing interplanetary shock observations. This index is the ratio of the in situ local shock speed and the transit speed; it is 0.6–0.9 for most observed shocks.
S. Watari, T. Detman
doaj   +1 more source

Electrostatic Plasma Wave Excitations at the Interplanetary Shocks

open access: yesThe Astrophysical Journal, 2023
Over the last few decades, different types of plasma waves (e.g., the ion acoustic waves (IAWs), electrostatic solitary waves, upper/lower hybrid waves, and Langmuir waves) have been observed in the upstream, downstream, and ramp regions of the ...
Manpreet Singh   +2 more
doaj   +1 more source

Signatures of interplanetary transients behind shocks and their associated near-surface solar activity [PDF]

open access: yesAnnales Geophysicae, 1998
Interplanetary transients with particular signatures different from the normal solar wind have been observed behind interplanetary shocks and also without shocks.
S. Bravo, X. Blanco-Cano
doaj   +1 more source

Electron Energy Partition across Interplanetary Shocks. II. Statistics [PDF]

open access: yesAstrophysical Journal Supplement Series, 2019
A statistical analysis of 15,210 electron velocity distribution function (VDF) fits, observed within ±2 hr of 52 interplanetary (IP) shocks by the Wind spacecraft near 1 au, is presented. This is the second in a three-part series on electron VDFs near IP
L. Wilson   +12 more
semanticscholar   +1 more source

Scattering of Superthermal Ions at Shocks: Dependence on Energy

open access: yesThe Astrophysical Journal, 2023
Diffusive shock acceleration requires the production of backstreaming superthermal ions (injection) as a first step. Such ions can be generated in the process of scattering of ions in the superthermal tail off the shock front. Knowledge of the scattering
Michael Gedalin   +3 more
doaj   +1 more source

Probabilistic Forecasts of Storm Sudden Commencements From Interplanetary Shocks Using Machine Learning

open access: yesSpace Weather, 2020
In this study we investigate the ability of several different machine learning models to provide probabilistic predictions as to whether interplanetary shocks observed upstream of the Earth at L1 will lead to immediate (Sudden Commencements, SCs) or ...
A. Smith   +5 more
semanticscholar   +1 more source

Acceleration of Solar Wind Particles by Traveling Interplanetary Shocks [PDF]

open access: yesAstrophysical Journal, 2019
The acceleration of thermal solar wind (SW) protons at spherical interplanetary shocks driven by coronal mass ejections is investigated. The SW velocity distribution is represented using κ-functions, which are transformed in response to simulated shock ...
P. Prinsloo   +2 more
semanticscholar   +1 more source

First Observations of Irregular Surface of Interplanetary Shocks at Ion Scales by Cluster [PDF]

open access: yesAstrophysical Journal, 2019
We present the first observational evidence of the irregular surface of interplanetary (IP) shocks by using multispacecraft observations of the Cluster mission.
P. Kajdič   +4 more
semanticscholar   +1 more source

Interplanetary shocks and foreshocks

open access: yes, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Blanco-Cano, X.   +8 more
openaire   +2 more sources

Transit of the Interplanetary Shocks Associated with Type II Radio Bursts Within 1AU [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
Among the interplanetary shock (IP shock)s observed by ACE spacecraft at 1AU during 1997 to 2000, we have selected 31 IP shocks which had triggered the interplanetary type II radio bursts detected by the WIND spacecraft while those shocks were leaving ...
Su Yeon Oh, Yu Yi, Yong Ha Kim
doaj   +1 more source

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