• 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
    1996/07/01 13:50:46 271 52 359 513 917 35.3*1 1.0e+15*2 6.6e+29*2 270 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/07/04 19:41:29 262 44 300 268 188 -3.3*1 2.8e+14 1.3e+29 270 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/05 21:21:21 264 47 177 178 181 0.1*1 5.7e+14*2 8.9e+28*2 268 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/07 05:03:30 245 34 65 63 21 -0.2*1 1.3e+13*2 2.7e+26*2 253 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C2
    1996/07/08 06:28:50 259 35 264 226 200 -2.7*1 3.1e+15 1.1e+30 258 C2 C3 195 PHTX DST Java Movie Poor Event
    1996/07/09 12:28:18 273 86 452 423 437 -3.7 4.4e+15 4.5e+30 257 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1996/07/10 07:28:36 254 35 227 210 0 -3.8*1 8.2e+14*2 2.1e+29*2 254 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/12 02:14:18 87 35 119 12 0 -51.1*1 ---- ---- 84 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C2
    1996/07/12 07:38:24 265 34 435 342 0 -21.3*1 ---- ---- 273 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/12 15:37:40 260 68 1085 1009 917 -24.1*1 6.9e+14*2 4.0e+30*2 269 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/07/13 02:51:34 201 6 ---- --- --- --- ---- ---- 205 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 1 point; Only C2
    1996/07/14 15:17:50 267 50 660 657 657 -0.4 6.2e+14 1.3e+30 264 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/15 10:46:51 273 43 632 750 928 26.2*1 2.4e+14*2 4.7e+29*2 274 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/07/15 22:26:35 241 31 240 319 670 19.0*1 3.4e+13*2 9.8e+27*2 245 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/07/16 02:19:53 278 47 602 582 586 -1.9 5.6e+14 1.0e+30 269 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/16 08:27:12 228 17 230 216 157 -1.5*1 ---- ---- 235 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/17 05:20:07 280 34 304 369 613 15.0*1 1.0e+14 4.7e+28 281 C2 C3 195 SXT PHTX DST Java Movie
    1996/07/17 12:10:43 279 28 320 230 0 -21.5*1 ---- ---- 273 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/07/17 16:01:17 94 47 310 328 346 1.7*1 4.8e+14*2 2.3e+29*2 94 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1996/07/20 09:28:16 31 175 246 429 477 9.4 1.3e+15*2 3.9e+29*2 34 C2 C3 195 SXT PHTX DST Java Movie Partial Halo
    1996/07/28 04:10:07 267 56 126 238 359 6.1*1 ---- ---- 265 C2 C3 195 PHTX DST Java Movie Poor Event
    1996/07/28 19:33:02 123 28 145 197 460 8.9*1 ---- ---- 122 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2
    1996/07/29 17:06:44 268 53 190 --- --- --- 3.9e+13*2 7.0e+27*2 266 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 2 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).