Tracking intense geomagnetic storms to the interplanetary medium and solar sources. A case study

DASSO, S.; MANDRINI, C.H.; SCHMIEDER, B.; ZHUKOV, A.; ARAN, A.; CERRATO, Y.; CID, C.; CREMADES, H.; MENVIELLE, M.; POEDTS, S.; RODRIGUEZ, L.; SAIZ, E.

Kyoto

Simposio; International Climate and Weather of the Sun-Earth system (CAWSES) Symposium; 2007

SCOSTEP

On 15 May 2005, a huge interplanetary coronal mass ejection (ICME) was observed near Earth. It triggered one of the most intense geomagnetic storms of solar cycle 23 (Dst peak = -263 nT). This structure has been associated with the two-ribbon flare, filament eruption, and coronal mass ejection originating in active region 10759 (NOAA number). We analyze here the sequence of events, from solar wind measurements (at 1 AU) and back to the Sun, to understand the origin and evolution of this geoeffective ICME.