• 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
    1996/01/11 00:14:36 267 18 499 426 0 -64.3*1 ---- ---- 272 SXT PHTX DST Java Movie Only C3
    1996/01/13 22:08:30 265 16 290 303 372 2.8*1 ---- ---- 266 SXT PHTX DST Java Movie Only C3
    1996/01/15 07:01:10 262 43 525 454 0 -31.1 ---- ---- 272 SXT PHTX DST Java Movie Only C3
    1996/01/22 03:11:01 105 37 267 130 0 -126.3*1 7.1e+13*2 2.5e+28*2 103 C3 SXT PHTX DST Java Movie Very Poor Event; Only C3
    1996/01/26 09:16:19 90 27 262 271 322 1.9*1 3.0e+14 1.0e+29 90 C3 SXT PHTX DST Java Movie Poor Event; Only C3
    1996/01/31 06:52:13 274 47 158 99 0 -12.3*1 2.5e+14*2 3.1e+28*2 272 C2 C3 SXT PHTX DST Java Movie Poor Event; Only 3 points

    *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).