• 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
    1996/10/01 00:20:05 258 52 320 352 377 2.9*1 2.3e+14 1.2e+29 254 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/10/04 03:15:05 299 28 355 172 158 -17.4*1 3.0e+13*2 1.9e+28*2 293 C2 C3 195 PHTX DST Java Movie Only C3
    1996/10/05 09:37:05 228 247 569 729 748 16.8 4.0e+15*2 6.4e+30*2 312 C2 C3 195 SXT PHTX DST Java Movie The width was changed from 161 to 247 deg on 2012/01/30. ; Partial Halo
    1996/10/08 14:10:08 229 21 154 129 0 -4.3*1 8.3e+12 9.8e+26 231 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/10/09 00:25:06 221 13 299 313 382 2.7*1 ---- ---- 227 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/10/11 02:50:06 111 45 209 271 420 7.0*1 2.1e+14 4.5e+28 108 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/10/14 15:15:05 268 37 195 338 935 37.3*1 4.0e+13*2 7.5e+27*2 270 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2
    1996/10/19 12:45:05 120 25 71 68 0 -0.3 ---- ---- 118 C2 C3 195 SXT PHTX DST Java Movie Not LE
    1996/10/19 17:17:05 159 170 480 593 600 9.4 ---- ---- 124 C2 C3 195 SXT PHTX DST Java Movie Partial Halo
    1996/10/20 09:01:41 68 31 74 --- --- --- ---- ---- 61 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C2
    1996/10/20 13:19:08 300 35 254 270 344 2.7*1 8.3e+15*2 2.7e+30*2 295 C2 C3 195 SXT PHTX DST Java Movie
    1996/10/22 20:44:01 205 10 ---- --- --- --- ---- ---- 211 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C3; Unable to measure
    1996/10/24 02:35:06 41 34 176 210 307 3.4*1 4.1e+11 6.3e+25 54 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1996/10/26 20:19:42 308 42 64 83 223 2.0*1 8.5e+13 1.7e+27 312 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2
    1996/10/27 13:57:34 295 17 76 76 77 0.0 ---- ---- 299 C2 C3 195 PHTX DST Java Movie
    1996/10/28 20:29:14 279 42 206 427 484 11.0*1 1.8e+14 3.9e+28 293 C2 C3 195 SXT PHTX DST Java Movie
    1996/10/30 05:40:05 247 25 582 598 618 2.6*1 1.3e+14 2.2e+29 253 C2 C3 195 SXT PHTX DST Java Movie
    1996/10/30 07:11:06 87 40 217 273 459 8.2*1 1.6e+14 3.8e+28 91 C2 C3 195 SXT PHTX DST Java Movie
    1996/10/31 06:25:06 256 16 455 327 0 -21.7*1 ---- ---- 260 C2 C3 195 SXT PHTX DST Java Movie

    *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).