Počet záznamů: 1
Linking 12 X-class flares and CMEs to SEP events and geomagnetic disturbances in 2002
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SYSNO ASEP 0521265 Druh ASEP A - Abstrakt Zařazení RIV Záznam nebyl označen do RIV Zařazení RIV Není vybrán druh dokumentu Název Linking 12 X-class flares and CMEs to SEP events and geomagnetic disturbances in 2002 Tvůrce(i) Schmieder, B. (FR)
Kim, R. (KR)
Grison, Benjamin (UFA-U) RID, ORCID
Bocchialini, K. (FR)
Kwon, R.-Y. (KR)Celkový počet autorů 4 Zdroj.dok. 16th European Space Weather Week. - Brussels : Solar-Terrestrial Centre of Excellence (STCE), 2019 Poč.str. 1 s. Forma vydání Online - E Akce European Space Weather Week /16./ Datum konání 18.11.2019 - 22.11.2019 Místo konání Liège Země BE - Belgie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. BE - Belgie Klíč. slova geomagnetic storm ; coronal mass ejections (CMEs) ; solar energetic particles (SEPs) Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Institucionální podpora UFA-U - RVO:68378289 Anotace We analyse systematically the chain of events related to the 12 X-ray flares of X class occurring in 2002: source region, CME, ICME, magnetic field at L1, geomagnetic indices, and SEP. No high SEP, no intense geomagnetic storm are related to any of these flares. Only one of them is associated to medium SEPs and a moderate storm. Three others are associated with a weak storm (-50 nT < min(Dst) < -30 nT). 75 % of the flares are associated with a halo CME with a good correlation rate for the speed/flux of the flare. However the flare sources are mainly close to the limb (70%) which is not favour for geomagnetic disturbances. The most important parameter of the IMF is the Bz orientation. It seems that the CMEs launched with high speed (around 2000 km/s) avoid the Earth in our sample. The location of the solar source, the shape of the CME, and the shock front have a direct impact on the geo-effectiveness We conclude that the association of big flares and strong geomagnetic disturbances may be valid only for extreme or intense geomagnetic storms. Otherwise the magnetic energy of active regions is released in an unexpected way into thermal energy and kinetic energy or in ejections of energetic particles. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2020
Počet záznamů: 1