The CME contained an arcade eruption followed by bright prominence structures. The onset height of the CME in white light is estimated to be about 1 solar radius above the surface. The CME can be seen to occupy the entire southwest quadrant.
More investigations are underway.
The EIT images show the development of the arcade along the neutral line from the northwest end to the southest end. This filament and the filament channel displayed continuous activity throughout the event. In time, the tentacle evolved into a set of sheared loops overlying the filaments. By comparing the appearance in different EIT images we find that the set of sheared loops were relatively hot. The EIT and SXT observations seem to suggest that reconnection proceeded from the northwest end to southeast end of the filament channel.