• 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
    1996/02/01 02:21:56 75 40 70 91 134 0.8*1 1.7e+14 4.1e+27 81 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1996/02/02 02:45:31 268 32 251 339 339 4.1*1 2.0e+14 6.4e+28 270 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1996/02/02 11:42:12 133 58 65 87 253 2.6*1 8.8e+13 1.9e+27 131 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only C2
    1996/02/02 23:00:47 180 119 80 121 213 1.8*1 2.5e+13 8.0e+26 164 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1996/02/03 00:07:03 83 52 306 317 309 0.9*1 1.9e+15 9.0e+29 80 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/02/06 06:21:31 267 43 37 0 0 -2.3*1 3.9e+12 2.7e+25 263 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only C2
    1996/02/08 05:17:49 263 70 184 126 0 -6.0*1 1.6e+14 2.7e+28 249 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/02/10 02:07:40 100 43 18 17 11 -0.0*1 4.6e+14 7.4e+26 95 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only C2
    1996/02/10 22:43:52 100 44 178 211 247 1.7*1 2.5e+14 3.9e+28 92 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1996/02/11 07:24:11 96 48 145 163 196 1.0*1 6.9e+13 7.3e+27 93 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1996/02/12 05:47:26 91 53 160 211 236 2.0*1 1.3e+15 1.7e+29 92 C2 C3 SXT PHTX DST Java Movie Poor Event
    1996/02/17 02:06:31 279 73 317 378 532 9.9*1 3.3e+14*2 1.6e+29*2 274 C2 C3 SXT PHTX DST Java Movie Very Poor Event
    1996/02/17 05:18:59 86 36 171 279 819 27.9*1 2.1e+14*2 3.1e+28*2 88 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2
    1996/02/18 01:03:59 271 29 180 219 337 4.1*1 5.0e+12 8.2e+26 271 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1996/02/19 05:15:48 98 30 266 403 946 36.7*1 1.3e+14*2 4.6e+28*2 94 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

    *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).