• 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
    1997/01/02 19:00:08 92 55 208 229 295 2.4*1 1.9e+14 4.1e+28 103 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/01/03 10:30:05 268 19 68 74 149 0.8*1 ---- ---- 274 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1997/01/03 13:30:05 84 16 311 368 403 4.8*1 ---- ---- 85 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1997/01/05 05:50:05 89 52 212 191 0 -6.9*1 2.2e+14*2 5.0e+28*2 86 C2 C3 SXT PHTX DST Java Movie
    1997/01/06 15:10:42 Halo (S) 360 136 224 319 4.1 5.8e+14*2 5.4e+28*2 180 C2 C3 SXT PHTX DST Java Movie
    1997/01/07 17:45:08 84 52 156 260 423 9.2*1 1.4e+15 1.7e+29 78 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3
    1997/01/10 10:04:21 85 57 325 297 297 -1.5*1 8.5e+14 4.5e+29 93 C2 C3 195 PHTX DST Java Movie
    1997/01/12 12:30:06 71 40 123 130 211 1.3*1 3.3e+14*2 2.5e+28*2 69 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2
    1997/01/12 23:31:05 65 51 176 169 122 -1.0*1 ---- ---- 71 C2 C3 195 PHTX DST Java Movie Poor Event
    1997/01/16 03:11:38 86 17 68 121 208 1.9*1 ---- ---- 85 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event
    1997/01/16 16:50:28 256 26 218 304 572 13.9*1 ---- ---- 262 C2 C3 195 SXT PHTX DST Java Movie
    1997/01/18 02:30:05 244 116 254 339 342 3.7 2.1e+15 6.8e+29 248 C2 C3 195 PHTX DST Java Movie
    1997/01/19 16:30:05 286 44 33 56 137 0.8*1 ---- ---- 286 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2
    1997/01/20 09:31:13 281 72 175 115 0 -3.3 1.4e+15 2.2e+29 285 C2 C3 195 PHTX DST Java Movie
    1997/01/21 06:30:07 275 32 353 805 683 24.1*1 ---- ---- 281 C2 C3 195 PHTX DST Java Movie
    1997/01/22 13:30:05 121 94 224 332 408 6.2 4.3e+14 1.1e+29 126 C2 C3 195 SXT PHTX DST Java Movie
    1997/01/23 07:30:05 107 19 152 162 188 0.6*1 ---- ---- 112 C2 C3 195 SXT PHTX DST Java Movie
    1997/01/24 04:30:05 85 42 113 90 0 -2.1*1 6.0e+14 3.8e+28 88 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).