• 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
    1998/10/15 10:04:36 Halo (BA) 360 262 322 321 3.2*1 ---- ---- 264 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3
    1998/10/22 01:42:14 184 113 164 156 105 -0.8*1 ---- ---- 209 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/22 03:09:47 60 40 384 510 512 8.4 ---- ---- 57 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/22 22:18:37 276 48 446 413 397 -2.9 ---- ---- 272 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/23 04:54:05 298 69 640 574 506 -10.3 ---- ---- 295 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/23 11:54:06 291 17 459 444 425 -1.8*1 ---- ---- 293 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/24 02:18:05 272 96 429 360 0 -12.7*1 ---- ---- 278 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/24 03:18:11 Halo (BA) 360 332 268 210 -4.8 ---- ---- 109 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/24 09:18:05 76 114 153 342 336 4.8*1 ---- ---- 69 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/25 12:54:06 Halo (OA) 360 839 795 802 -6.7 ---- ---- 74 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 01:54:05 138 32 354 338 322 -1.4 ---- ---- 144 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 03:54:05 95 8 372 394 644 12.5*1 ---- ---- 96 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C2
    1998/10/26 05:54:05 290 5 405 382 217 -5.8*1 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 05:54:05 247 30 379 521 692 17.6*1 ---- ---- 251 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 16:18:06 90 158 544 512 478 -4.3 ---- ---- 143 C2 C3 195 SXT PHTX DST Java Movie Partial Halo
    1998/10/26 17:18:05 288 17 799 784 774 -2.6 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 21:37:30 287 7 475 751 883 30.4 ---- ---- 282 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/27 01:26:00 293 5 426 377 0 -13.2*1 ---- ---- 288 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/27 11:18:06 288 15 342 77 0 -122.5*1 ---- ---- 288 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1998/10/27 11:18:06 281 35 614 501 508 -11.6 ---- ---- 283 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 02:54:05 121 58 268 283 312 1.4 ---- ---- 107 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 04:54:05 40 59 208 246 330 3.3*1 ---- ---- 45 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 07:54:05 120 66 486 451 374 -5.6 ---- ---- 94 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/29 00:54:05 62 91 364 392 397 1.8 ---- ---- 60 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/29 08:54:06 294 9 610 672 1261 55.0*1 ---- ---- 285 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1998/10/29 12:18:05 118 56 577 630 622 4.8 ---- ---- 110 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/29 16:54:06 248 41 369 339 226 -4.5*1 ---- ---- 259 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/30 04:54:05 291 9 401 253 0 -54.3*1 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie Only 3 points
    1998/10/30 16:18:05 264 60 213 200 0 -2.2*1 ---- ---- 280 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/30 17:54:05 17 23 345 552 542 11.6 ---- ---- 16 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/31 01:54:05 243 37 227 309 421 6.4 ---- ---- 247 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/31 02:18:08 126 48 79 --- --- --- ---- ---- 121 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C2
    1998/10/31 16:54:05 143 24 354 431 607 12.1 ---- ---- 137 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/31 22:50:54 83 59 283 434 1109 51.4*1 ---- ---- 82 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).