Event 1997/08/28

                First appearance in C2:                  16:41 UT
                Average velocity in C2/C3:           167.4 km/s
                Average acceleration in C2/C3:  -10.8 m/s/s
                Position angle in C2:                       99 degre
                Angular width in C2:                      77 degree
                First appearance in C1:                  16:09 UT
                 no flare, back-side source region
                 CME final speed:                                       ~220.0 km/s
                 CME acceleration time:                          ~40.0 min
                  Average acceleration in C1/C2/C3:    91.7 m/s/s
        Source Region:
                  backside of the Sun over the eastern limb
                  an impulsive CME, but with very slow velocity, possibly due to heavy streamer ahead
                  C1: no sharp bright LE, measureing cavity expansion
                  C2: heavy and thick streamer overlying, measuring cavity behind
                  C3: cavity not clearly observed, no data used in plots, though CME LE well observed
                  EIT: 16:12 UT, PA 135, start dimming and eruption
                  GOES: no flare

CME Height-Time measurement data (04/07/05)

CME measurement timing versus flare

CME Height-Time, flare plot

CME Velocity-Time, flare plot

Sample Images