Evolution of a Halo Coronal Mass Ejection of March 09, 2012 Associated with EUV Waves

摘要

In this work we analyse the evolution of a halo coronal mass ejection (CME) observed on March 09, 2012, exhibiting a velocity of 950 ms~(-1). The EUV images recorded by the Extreme Ultraviolet Imager (EUVI), aboard STEREO show evidence of a shockwave produced by the expansion of the CME. The event was also associated with an M.6 class X-ray solar flare, starting at 03:22 UT, peaking at 03:53 UT and ending at 04:18 UT. Type II radio emission was also recorded in the metric wavelength (100-250 MHz) by e-Callisto spectrographs. The following spectrum-temporal parameters of type II burst were estimated: starting frequency of (220 ± 5) MHz, ending frequency of (170 ± 5) MHz, frequency bandwidth of 34.3 MHz and starting and ending time of about 03:41:51 UT and 03:46:49 UT, respectively.