• 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
    1996/05/01 08:41:46 94 95 314 327 322 0.7 1.8e+15 8.9e+29 70 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1996/05/02 01:55:35 85 83 226 226 226 -0.0*1 1.7e+15*2 4.4e+29*2 101 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C3
    1996/05/02 23:07:21 88 43 224 266 274 2.2*1 ---- ---- 93 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/05/03 11:30:47 92 62 325 340 334 2.0*1 4.1e+13*2 2.1e+28*2 78 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/05/05 07:02:06 92 56 373 --- --- --- 2.1e+15*2 1.5e+30*2 82 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 2 points; Only C3
    1996/05/05 20:36:33 94 69 388 380 382 -0.6 3.3e+15 2.5e+30 75 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1996/05/06 09:42:38 88 73 430 360 404 -5.0*1 2.7e+15 2.5e+30 83 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1996/05/11 08:31:10 268 58 476 485 489 0.9 4.9e+14 5.6e+29 269 C2 C3 195 SXT PHTX DST Java Movie
    1996/05/14 02:57:22 79 54 304 409 600 14.5*1 2.5e+12*2 1.2e+27*2 81 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1996/05/16 15:16:21 270 52 310 324 352 1.5*1 3.0e+14*2 1.5e+29*2 269 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/05/18 17:07:38 272 68 269 218 141 -5.5*1 9.1e+14*2 3.3e+29*2 267 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C3
    1996/05/22 02:55:40 97 42 221 225 233 0.4*1 7.7e+14 1.9e+29 98 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/05/22 06:48:33 271 23 178 153 0 -6.4*1 ---- ---- 273 C2 C3 195 SXT PHTX DST Java Movie Only C2
    1996/05/25 02:58:36 254 30 190 248 432 8.0*1 4.2e+13 7.6e+27 265 C2 C3 195 SXT PHTX DST Java Movie Poor Event

    *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).