• 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 6.6e+15*2 2.3e+30*2 264 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 5.2e+14 7.0e+28 209 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/22 03:09:47 60 40 384 510 512 8.4 1.2e+15 8.6e+29 57 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/22 15:35:03 335 9 475 566 1109 46.2*1 ---- ---- 333 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/10/22 22:18:37 276 48 446 413 397 -2.9 1.1e+15 1.1e+30 272 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/23 04:54:05 298 69 640 574 506 -10.3 2.3e+15 4.7e+30 295 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/23 11:18:05 99 18 201 212 239 0.9*1 ---- ---- 107 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/10/23 11:54:06 291 17 459 444 425 -1.8*1 ---- ---- 293 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/23 17:18:12 57 >173 193 207 229 0.9*1 4.4e+14*2 8.2e+28*2 354 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Uncertain Width; Partial Halo
    1998/10/24 02:18:05 272 96 429 360 0 -12.7*1 2.6e+15*2 2.4e+30*2 278 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/24 03:18:11 Halo (BA) 360 332 268 210 -4.8 7.8e+15*2 4.3e+30*2 109 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/24 09:18:05 76 114 153 342 336 4.8*1 2.2e+15 2.6e+29 69 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/25 04:54:05 264 25 187 201 212 0.6*1 2.7e+13 4.8e+27 264 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/10/25 12:54:06 Halo (OA) 360 839 795 802 -6.7 7.2e+15*2 2.5e+31*2 74 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 01:54:05 138 32 354 338 322 -1.4 5.4e+14 3.4e+29 144 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 1.7e+14 1.2e+29 251 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/26 07:54:05 254 23 145 153 252 1.9*1 9.5e+13 1.0e+28 255 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/10/26 08:54:07 293 13 259 169 0 -17.8*1 ---- ---- 296 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event
    1998/10/26 14:54:07 302 10 327 321 291 -1.1*1 ---- ---- 295 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/10/26 16:18:06 90 158 544 512 478 -4.3 1.8e+15*2 2.6e+30*2 143 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 1.0e+15 1.9e+30 283 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 02:54:05 121 58 268 283 312 1.4 1.7e+15 6.2e+29 107 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 04:54:05 40 59 208 246 330 3.3*1 7.2e+14 1.5e+29 45 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 07:54:05 120 66 486 451 374 -5.6 1.1e+15 1.3e+30 94 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/28 13:25:56 299 15 244 263 270 1.0*1 ---- ---- 292 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/10/29 00:54:05 62 91 364 392 397 1.8 3.4e+15 2.2e+30 60 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/29 06:18:05 308 18 452 777 1884 148.4*1 ---- ---- 302 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event
    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 9.3e+14 1.5e+30 110 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/29 16:54:06 248 41 369 339 226 -4.5*1 1.0e+14 7.1e+28 259 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 7.6e+13 1.7e+28 280 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/30 17:54:05 17 23 345 552 542 11.6 1.3e+14 7.5e+28 16 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/30 23:31:30 300 16 392 265 0 -18.3*1 ---- ---- 296 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/10/31 01:54:05 243 37 227 309 421 6.4 1.0e+15 2.6e+29 247 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/31 02:18:08 126 48 79 --- --- --- 1.6e+14*2 4.9e+27*2 121 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 1.2e+14 7.3e+28 137 C2 C3 195 SXT PHTX DST Java Movie
    1998/10/31 22:50:54 83 59 283 434 1109 51.4*1 2.0e+14*2 8.1e+28*2 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).