Statistical Analysis of Solar Events Associated with SSC over Year of Solar Maximum during Cycle 23: 1. Identification of Related Sun-Earth Events - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2017

Statistical Analysis of Solar Events Associated with SSC over Year of Solar Maximum during Cycle 23: 1. Identification of Related Sun-Earth Events

Karine Bocchialini
M. Menvielle
  • Fonction : Auteur
Aude Chambodut
Dominique Fontaine
A. Marchaudon
Monique Pick
  • Fonction : Auteur
F. Pitout
  • Fonction : Auteur
Brigitte Schmieder
Stéphane Régnier
Yannis Zouganelis
  • Fonction : Auteur

Résumé

Taking the 32 sudden storm commencements (SSC) listed by the observatory de l'Ebre / ISGI over the year 2002 (maximal solar activity) as a starting point, we performed a statistical analysis of the related solar sources, solar wind signatures, and terrestrial responses. For each event, we characterized and identified, as far as possible, (i) the sources on the Sun (Coronal Mass Ejections -CME-), with the help of a series of herafter detailed criteria (velocities, drag coefficient, radio waves, polarity), as well as (ii) the structure and properties in the interplanetary medium, at L1, of the event associated to the SSC: magnetic clouds -MC-, non-MC interplanetary coronal mass ejections -ICME-, co-rotating/stream interaction regions -SIR/CIR-, shocks only and unclear events that we call "miscellaneous" events. The categorization of the events at L1 is made on published catalogues. For each potential CME/L1 event association we compare the velocity observed at L1 with the one observed at the Sun and the estimated balistic velocity. Observations of radio emissions (Type II, Type IV detected from the ground and /or by WIND) associated to the CMEs make the solar source more probable. We also compare the polarity of the magnetic clouds with the hemisphere of the solar source. The drag coefficient (estimated with the drag-based model) is calculated for each potential association and it is compared to the expected range values. We identified a solar source for 26 SSC related events. 12 of these 26 associations match all criteria. We finally discuss the difficulty to perform such associations.
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Dates et versions

hal-02861288 , version 1 (08-06-2020)

Identifiants

  • HAL Id : hal-02861288 , version 1

Citer

B. Grison, Karine Bocchialini, M. Menvielle, Aude Chambodut, Nicole Cornilleau-Wehrlin, et al.. Statistical Analysis of Solar Events Associated with SSC over Year of Solar Maximum during Cycle 23: 1. Identification of Related Sun-Earth Events. AGU Fall meeting, Dec 2017, New Orleans, Louisiane, United States. 31, 2017. ⟨hal-02861288⟩
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