Radio-rich solar eruptive events
Thompson, B. J.; Kaiser, M. L.; Burlaga, L. F.; Gopalswamy, N.; Szabo, A.; Yashiro, S.; Bougeret, J. -L.; Vourlidas, A.; Lara, A.
United States, Japan, France
Abstract
We report on the analysis of a large number of solar eruptive events that produced radio emission in the dekameter-hectometric (DH) radio window (1-14 MHz), newly opened by the Wind/WAVES experiment. The distinguishing characteristics of coronal mass ejections (CMEs) associated with the DH type II radio bursts are larger-than-average width and speed. Flares of all sizes (X-ray importance B to X) occurring at all longitudes were associated with the DH type II bursts and CMEs. We found a global enhancement in EUV over an area much larger than the flaring active region in the beginning many events. A comparison between the ‘Shock Associated’ events and microwave bursts shows that at least half of the events do not have temporal relation. A majority of the DH type II bursts were associated with IP shocks and kilometric type II bursts. In particular, we found a very close relationship between the kilometric type II bursts and the IP shocks.