From the Sun’s atmosphere to the Earth’s atmosphere: an overview of scientific models available for space weather developments [PDF]
Annales Geophysicae, 2002 Space weather aims at setting operational numerical tools in order to nowcast, forecast and quantify the solar activity events, the magnetosphere, ionosphere and thermosphere responses and the consequences on our technological societies.
C. Lathuillère +7 more
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Betatron Acceleration of Suprathermal Electrons within a Small-scale Flux Rope in the Solar Wind
The Astrophysical Journal Letters, 2023 A growing body of evidence from observations, theories, and simulations indicates that particles can be effectively accelerated in solar wind regions filled with dynamic small-scale flux ropes (FRs).
Weiduo Meng +9 more
doaj +1 more source
Modelling interplanetary CMEs using magnetohydrodynamic simulations [PDF]
Annales Geophysicae, 2002 The dynamics of Interplanetary Coronal Mass Ejections (ICMEs) are discussed from the viewpoint of numerical modelling. Hydrodynamic models are shown to give a good zero-order picture of the plasma properties of ICMEs, but they cannot model the ...
P. J. Cargill +2 more
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Observations of interplanetary scintillation during the 1998 Whole Sun Month: a comparison between EISCAT, ORT and Nagoya data [PDF]
Annales Geophysicae, 2000 Observations of interplanetary scintillation (IPS) allow accurate solar wind velocity measurements to be made at all heliographic latitudes and at a range of distances from the Sun.
P. J. Moran +11 more
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Space- and ground-based investigations of solar wind-magnetosphere-ionosphere coupling [PDF]
, 2006 This paper provides a brief review of the understanding of the coupled solar wind–magnetosphere–ionosphere system that can be attained from observations of the size of the ionospheric polar caps from space and the ground.
Milan, S. E. +3 more
core +3 more sources
On the triggering of auroral substorms by northward turnings of the interplanetary magnetic field [PDF]
, 2009 Some studies over the last decade have indicated that the instability responsible for substorm expansion phase onset may require an external trigger such as a northward turning of the interplanetary magnetic field (IMF). Statisti- cal investigations have
Wild, J.A. +2 more
core +3 more sources
Predictions of the arrival time of Coronal Mass Ejections at 1AU: an analysis of the causes of errors [PDF]
Annales Geophysicae, 2004 Three existing models of Interplanetary Coronal Mass Ejection (ICME) transit between the Sun and the Earth are compared to coronagraph and in situ observations: all three models are found to perform with a similar level of accuracy (i.e.
M. Owens, P. Cargill
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In situ local shock speed and transit shock speed [PDF]
Annales 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
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Reconnection in a rotation-dominated magnetosphere and its relation to Saturn's auroral dynamics [PDF]
, 2005 The first extended series of observations of Saturn's auroral emissions, undertaken by the Hubble Space Telescope in January 2004 in conjunction with measurements of the upstream solar wind and interplanetary magnetic field (IMF) by the Cassini ...
Clarke, J. T. +8 more
core +3 more sources
What causes the variations of the peak intensity of CIR accelerated energetic ion fluxes? [PDF]
Annales Geophysicae, 1998 The variation of the peak intensity of energetic ions accelerated at CIR related shocks in the interplanetary medium as observed by instruments on board of ULYSSES during its pass towards the south polar region and from the north polar region back to ...
E. Keppler
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