February 24 2002 (SSC03,-71) MC CMEN03

 

 

24 February 14:06: Appearance of a bright point in EIT at 195 Å; This point is overlaid at 15:06 UT by a weak white light brightening, observed in the SOHO/LASCO C2 coronagraph, and by a radio source detected with the NRH at 432 MHz and at 164 MHz. 14:47 UT: the shape of the radio emitting region becomes elongated, due to the onset of a  more sporadic new source than the first one and well resolved at 432 MHz. The radio emission is detected until 15:33:45 UT (end of the NRH observations; see secchirh.obspm.fr). 15:45: Onset of a type II burst detected at decameter wavelengths (see sechirh.obspm.fr). 15:30 UT: Onset of  a CME (CMEN03, PA 260 (deg), Width 54 (deg), V 231 258, 405  Km/s); appearance, in the SOHO/C2 image, of a narrow elongated feature located along the same region as the radio source; the C2 image at 15:54 UT shows that the CME is split into two parts located on each side of the white light feature; the evolution of the southern part becomes distinct from the northern one, and then two distinct CMEs are observed in C2 and C3. A possible origin of this effect is a magnetic interaction between the narrow feature and the CME.

This event shares the following characteristics:  432 MHz (no evidence in the microwaves),  Continuum  B, Type II, Interaction between the CME and  a white light feature.