• 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
    1997/05/01 00:43:07 278 22 156 153 136 -0.3*1 1.4e+14*2 1.7e+28*2 272 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/01 03:54:05 81 71 205 293 337 4.3*1 3.3e+13 7.0e+27 90 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/01 19:22:05 264 50 257 417 414 9.3 ---- ---- 271 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1997/05/02 00:40:05 75 97 343 377 402 3.0*1 1.0e+15 5.9e+29 88 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/05/02 04:50:40 262 60 211 222 253 1.0*1 ---- ---- 260 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/05/03 10:30:05 238 5 868 --- --- --- ---- ---- 244 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 2 points; Only C2
    1997/05/03 22:16:44 262 28 245 236 208 -0.9*1 ---- ---- 265 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/04 22:57:05 88 51 202 174 0 -5.4*1 4.5e+14 9.1e+28 89 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/05 06:30:07 87 55 395 771 699 22.5 ---- ---- 84 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/05/07 10:26:05 269 56 234 226 128 -1.9*1 4.7e+14*2 1.3e+29*2 270 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/05/10 16:04:12 266 40 255 241 0 -3.5*1 ---- ---- 266 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/05/11 20:25:58 292 8 245 230 221 -0.8*1 ---- ---- 281 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/12 05:30:05 Halo (S) 360 464 335 220 -15.0*1 4.2e+15*2 4.5e+30*2 264 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/05/15 20:31:33 270 40 146 160 201 1.0*1 5.5e+14*2 5.9e+28*2 267 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/16 00:22:37 280 15 129 182 335 4.8*1 ---- ---- 274 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/16 12:45:06 276 49 554 574 566 1.5 2.3e+15 3.5e+30 289 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/17 02:41:24 94 51 331 247 0 -16.5*1 2.4e+14*2 1.3e+29*2 92 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1997/05/17 11:22:24 93 44 312 285 272 -1.8*1 6.2e+14 3.0e+29 82 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/17 20:30:05 94 43 280 297 295 0.8 4.8e+14 1.9e+29 91 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/18 23:13:05 88 32 353 624 650 17.6 1.6e+15 1.0e+30 88 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/21 01:30:06 90 40 292 421 498 11.0*1 8.0e+14 3.4e+29 85 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/05/21 04:19:22 269 50 39 55 131 0.7*1 1.9e+15 1.5e+28 274 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1997/05/21 21:00:53 263 165 296 322 323 1.4 2.2e+15*2 9.7e+29*2 267 C2 C3 195 SXT PHTX DST Java Movie Partial Halo
    1997/05/22 19:30:08 102 66 346 394 507 7.5*1 6.5e+14 3.9e+29 98 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/24 13:31:05 106 58 192 147 0 -10.1*1 1.0e+14*2 1.9e+28*2 102 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1997/05/25 14:48:05 93 82 684 658 671 -2.4 3.0e+15 7.0e+30 92 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/05/26 01:30:05 87 50 361 435 434 4.6 6.8e+14 4.4e+29 88 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/26 02:45:05 270 41 323 385 414 4.5 1.9e+14 9.9e+28 265 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/05/26 20:22:35 89 52 307 266 128 -4.4*1 5.5e+14 2.6e+29 81 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/27 10:15:39 271 47 429 449 453 1.6 9.3e+14 8.6e+29 266 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/27 13:31:05 82 47 333 306 308 -1.5 8.8e+14 4.9e+29 87 C2 C3 195 SXT PHTX DST Java Movie
    1997/05/29 01:30:06 92 58 272 252 118 -2.9*1 1.6e+14 5.7e+28 75 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/05/29 18:44:59 286 12 304 248 0 -7.1*1 ---- ---- 277 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1997/05/30 00:30:16 89 65 288 277 218 -2.7*1 2.0e+14*2 8.3e+28*2 88 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C3
    1997/05/30 22:00:05 90 43 247 390 716 21.7*1 ---- ---- 88 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1997/05/31 18:38:45 280 51 249 510 461 10.4 3.8e+15 1.2e+30 275 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).