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The joint use of high-resolution data from PROBA2 and SDO satellites andLASCO/SOHO coronographs enabled us to examine early stages of initiation andpropagation of six limb CMEs registered in June 2010 - June 2011. For fiveevents under consideration, the CME initiation is marked by filament(prominence) eruption or by a loop-like structure having another nature.Subsequently, several loop-like structures having higher brightness andfollowing each other at different velocities appear in the region of the CMEinitiation. The CME frontal structure is formed by these loop-like structures.The time-dependent velocities and acceleration of the ejection front have beenobtained for all CMEs under consideration. We have drawn a conclusion about thepossible existence of two CME types dependent on the time profile of theirvelocity. The first CME type comprises the ejections whose velocity decreasesabruptly by more than 100 km/s after having reached the maximum; it thereuponpasses to slow deceleration/variation. The second CME type is formed by theejections whose velocity varies insignificantly after reaching the maximum. TheCME angular size is shown to increase up to threefold at the initial stage ofpropagation; it increases twofold 3.5-11 minutes after the first measurement ofthis parameter. When considering 3 CMEs, we see that their broadening exceedstheir extension in the longitudinal direction during a certain period of timeat the initial propagation stage.

Study of CME properties using high resolution data