• 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
    1996/03/02 04:11:53 88 36 108 120 177 1.0*1 1.5e+14 8.7e+27 86 C2 C3 SXT PHTX DST Java Movie Poor Event
    1996/03/03 04:12:30 99 26 186 232 215 2.3*1 1.6e+14*2 2.8e+28*2 99 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/03/06 05:38:36 268 55 175 --- --- --- 3.6e+13*2 5.6e+27*2 261 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only 2 points; Only C3
    1996/03/07 01:00:19 57 39 200 169 135 -2.3*1 3.8e+14*2 7.5e+28*2 53 C2 C3 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C3
    1996/03/07 07:51:56 91 43 60 61 75 0.1*1 ---- ---- 87 C2 C3 SXT PHTX DST Java Movie Poor Event
    1996/03/08 07:12:03 90 19 170 229 189 2.8*1 ---- ---- 85 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/03/09 04:27:49 84 39 93 82 0 -1.1*1 ---- ---- 82 C2 C3 SXT PHTX DST Java Movie Only 3 points
    1996/03/11 18:22:39 86 52 244 352 656 20.1*1 4.4e+14*2 1.3e+29*2 77 C2 C3 SXT PHTX DST Java Movie Only 3 points
    1996/03/13 02:42:06 105 17 130 195 312 4.0*1 ---- ---- 106 C2 C3 SXT PHTX DST Java Movie
    1996/03/14 09:38:00 101 22 74 94 177 1.2*1 ---- ---- 99 C2 C3 SXT PHTX DST Java Movie
    1996/03/14 11:44:18 285 59 418 307 302 -8.9*1 1.2e+15*2 1.0e+30*2 292 C2 C3 SXT PHTX DST Java Movie
    1996/03/15 13:54:27 101 26 222 244 386 4.7*1 ---- ---- 101 C2 C3 SXT PHTX DST Java Movie Only 3 points
    1996/03/15 23:57:34 76 29 71 98 198 1.9*1 ---- ---- 78 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C3
    1996/03/16 02:03:38 262 27 65 107 292 3.8*1 ---- ---- 267 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2
    1996/03/18 02:45:52 94 22 ---- --- --- --- ---- ---- 92 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure
    1996/03/18 08:33:09 276 25 158 177 212 1.2*1 1.3e+14*2 1.7e+28*2 280 C2 C3 SXT PHTX DST Java Movie Very Poor Event
    1996/03/18 16:26:43 257 32 ---- --- --- --- ---- ---- 263 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure
    1996/03/22 00:48:44 282 17 142 177 228 2.0*1 ---- ---- 284 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C3

    *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).