Indentification method of coronal mass ejection and its propagation

We use a geometrical model to detect the propagation and the velocity of Coronal Mass Ejection, then using the data from STEREO (Solar Terrestrial Relations Observatory), we reconstruct the CME in space. By using this model we can detect the occurrence of the CME and its propagation in space. On August 4, 2011 a strong M9.3 flare is erupted from active region NOAA 1261 which was located on 15° North and 49° West of the solar hemisphere. This flare was accompanied by a Coronal Mass Ejection (CME). We can derive the variation of this CME speed and its propagation by analyzing the COR2 SECCHI STEREO data.