• CME heights (with respect to the disk center) are measured at the fastest segment of the leading edge.
  • PA= Position Angle measured from Solar North in degrees (counter-clockwise)
  • Halo CMEs are indicated in the "Central PA" column. The letters ("S", "BA", "OA") in the brackets show type of halo CMEs. See examples.
  • Click on date to view Java script movie of the CME.
  • Click on time to see height-time measurements as a text file.
  • Click on speed to view height-time plots of the CME.
  • Beware of data gaps. Check for LASCO/C2 data gaps here.

  • A complete description of the catalog
  • Click here to search the entire catalog.

    First C2 Appearance
    Date Time [UT]
    Central
    PA
    [deg]
    Angular
    Width [deg]
    Linear
    Speed [km/s]
    2nd-order Speed at final height [km/s] 2nd-order Speed at 20 Rs [km/s] Accel
    [m/s2]
    Mass
    [gram]
    Kinetic
    Energy
    [erg]
    MPA [deg] Movies, plots, & links Remarks
    1996/08/01 12:36:35 274 35 499 551 615 7.4*1 2.6e+14*2 3.2e+29*2 270 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/01 18:12:21 210 82 118 142 324 4.0*1 9.8e+13 6.8e+27 229 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1996/08/03 19:45:37 231 26 71 84 128 0.5*1 ---- ---- 240 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/08/07 13:15:05 242 27 ---- --- --- --- ---- ---- 249 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure
    1996/08/10 09:25:05 68 68 148 164 201 1.0*1 4.6e+14 5.0e+28 65 C2 C3 SXT PHTX DST Java Movie Poor Event
    1996/08/10 16:55:05 290 42 413 575 652 17.5 9.1e+14 7.8e+29 285 C2 C3 SXT PHTX DST Java Movie
    1996/08/12 16:16:56 89 37 210 --- --- --- ---- ---- 89 C2 C3 195 SXT PHTX DST Java Movie UVCS Poor Event; Only 2 points; Only C3
    1996/08/13 07:15:05 259 92 298 266 243 -2.2*1 4.8e+14*2 2.1e+29*2 263 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/13 16:09:18 258 153 620 604 610 -1.8*1 5.0e+15*2 9.6e+30*2 231 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C3; Partial Halo
    1996/08/14 07:26:22 204 169 244 254 292 1.4*1 5.3e+12*2 1.6e+27*2 231 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Partial Halo
    1996/08/14 19:30:09 229 235 691 --- --- --- 3.1e+15*2 7.4e+30*2 237 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C3; Partial Halo
    1996/08/15 21:00:05 123 69 156 187 245 2.2*1 3.6e+14 4.4e+28 121 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/16 14:14:06 Halo (BA) 360 364 390 399 2.0*1 5.6e+14*2 3.7e+29*2 158 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/19 11:18:27 127 82 406 467 465 4.7 1.8e+15 1.5e+30 125 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/20 02:00:06 121 23 256 354 350 4.8 6.2e+14 2.0e+29 118 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/20 11:10:05 275 42 172 149 109 -1.2 1.9e+14 2.8e+28 284 C2 C3 195 SXT PHTX DST Java Movie
    1996/08/21 22:48:51 291 41 286 280 282 -0.6*1 6.2e+14*2 2.6e+29*2 274 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1996/08/22 08:38:43 91 125 979 1220 1035 51.9*1 5.2e+15*2 2.5e+31*2 129 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C3; Partial Halo

    *1 Acceleration is uncertain due to either poor height measurement or a small number of height-time measurements (See Section 3.4 of Yashiro et al. 2004 for details).
    *2 Mass and Kinetic Energy are uncertain due to poor mass estimate. Mass measurement assumes that the CME material is in the sky-plane. Kinetic Energy is obtained from the mass and linear speed (see Vourlidas et al. 2000 for details).