• 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
    1998/04/01 13:10:10 106 31 476 371 233 -13.0*1 2.8e+14 3.1e+29 112 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/01 13:43:31 309 6 395 470 875 27.9*1 ---- ---- 302 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2
    1998/04/01 15:12:39 197 47 330 285 113 -5.8*1 2.5e+14 1.4e+29 192 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/02 06:43:13 263 65 277 302 405 4.3 7.0e+14 2.7e+29 251 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/02 12:34:16 318 6 296 313 512 7.6*1 ---- ---- 314 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only 3 points; Only C2
    1998/04/02 18:30:45 149 48 155 160 204 0.8*1 3.0e+14 3.6e+28 143 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/03 04:23:39 261 72 482 395 334 -9.4 1.1e+15 1.3e+30 265 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/03 07:01:43 106 17 330 309 0 -10.9*1 ---- ---- 99 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only 3 points; Only C2
    1998/04/03 16:32:42 120 8 372 400 429 2.8*1 ---- ---- 116 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/03 17:35:35 103 10 313 308 244 -1.8*1 ---- ---- 98 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2
    1998/04/03 20:12:14 258 70 521 350 354 -17.1 1.5e+15 2.1e+30 258 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/04 02:46:54 18 58 237 257 271 1.1 1.9e+14 5.2e+28 22 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/04 05:47:58 57 43 95 84 0 -1.5 3.0e+14 1.4e+28 55 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2005/10/05
    1998/04/04 05:47:58 261 60 197 192 169 -0.5*1 4.1e+13 7.9e+27 263 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/04 07:34:17 96 12 386 302 0 -31.3*1 ---- ---- 93 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2
    1998/04/04 08:31:11 294 15 191 266 507 10.0*1 ---- ---- 292 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/04 15:41:47 91 43 524 539 533 1.1 4.2e+14 5.8e+29 88 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/04 18:13:18 255 66 402 465 516 6.3 7.1e+14 5.7e+29 253 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/04 23:29:01 111 18 420 404 379 -2.0 ---- ---- 107 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/05 01:05:44 247 39 192 182 122 -1.1*1 1.3e+14*2 2.5e+28*2 259 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1998/04/05 04:40:34 106 7 334 307 167 -4.4 ---- ---- 104 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/05 06:24:53 237 41 347 395 444 4.5*1 4.5e+14 2.7e+29 242 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.
    1998/04/05 15:51:34 238 24 473 421 226 -10.4*1 6.2e+13 7.0e+28 259 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/06 02:00:55 252 64 404 484 491 5.8*1 2.2e+15 1.8e+30 245 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/06 05:04:50 248 62 878 718 811 -16.9 2.6e+15 1.0e+31 256 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/06 08:49:52 115 67 162 170 247 1.6*1 2.4e+14 3.2e+28 133 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/06 09:23:11 294 40 198 304 712 20.6*1 3.0e+14 5.9e+28 288 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2
    1998/04/06 18:33:28 111 14 390 226 0 -41.4*1 ---- ---- 112 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1998/04/06 23:27:05 94 24 385 236 0 -38.0*1 1.2e+14 9.0e+28 104 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/07 09:10:15 280 17 216 243 363 4.1*1 ---- ---- 275 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/07 10:14:19 90 20 395 294 0 -20.4*1 5.9e+13*2 4.6e+28*2 100 C2 C3 195 SXT PHTX DST Java Movie UVCS Poor Event
    1998/04/07 12:18:35 90 13 224 220 201 -0.5*1 ---- ---- 91 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1998/04/07 19:59:47 96 7 360 352 268 -2.7*1 ---- ---- 95 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/08 03:27:39 78 44 441 692 638 15.2 1.8e+15 1.7e+30 74 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/08 03:59:20 290 27 845 839 840 -0.9 9.3e+14 3.3e+30 284 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/08 06:37:46 249 41 197 293 910 34.0*1 4.4e+13*2 8.6e+27*2 254 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C2
    1998/04/08 06:37:46 12 56 170 204 256 2.0*1 2.9e+14 4.2e+28 20 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/08 12:42:01 4 78 185 350 471 9.4*1 2.5e+14 4.3e+28 16 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/08 18:41:11 286 56 435 615 527 8.8 1.9e+15 1.8e+30 283 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/08 20:05:30 79 17 232 214 124 -2.0*1 ---- ---- 84 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/09 06:44:47 30 39 773 843 849 9.6 6.5e+14 2.0e+30 43 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/09 09:06:50 241 64 291 330 325 1.8 5.6e+14 2.4e+29 236 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/09 10:35:17 220 29 161 167 176 0.3*1 4.0e+14 5.2e+28 230 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.
    1998/04/09 10:35:17 282 35 221 307 847 28.6*1 3.7e+13*2 9.1e+27*2 288 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C2
    1998/04/09 13:42:48 273 26 179 203 228 1.2*1 3.1e+13 4.9e+27 277 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/09 14:16:28 220 21 271 458 1375 79.6*1 5.6e+13*2 2.1e+28*2 228 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2
    1998/04/10 01:55:05 97 67 539 397 450 -11.7 1.4e+15 2.0e+30 95 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/10 06:55:05 321 58 124 150 217 1.6*1 1.3e+14 9.9e+27 328 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/10 18:00:33 291 40 112 163 211 1.8*1 5.1e+14 3.2e+28 292 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/10 18:51:10 218 17 181 164 0 -4.3*1 ---- ---- 222 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/10 22:22:16 81 41 155 274 401 7.3*1 6.6e+14 7.9e+28 84 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/11 04:26:05 135 67 193 154 0 -14.9*1 6.0e+13*2 1.1e+28*2 121 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/11 08:55:05 127 72 198 171 0 -7.5*1 2.4e+14 4.7e+28 131 C2 C3 SXT PHTX DST Java Movie UVCS Only C2
    1998/04/11 22:27:05 73 14 417 312 0 -17.9*1 ---- ---- 77 C2 C3 SXT PHTX DST Java Movie Poor Event
    1998/04/12 12:55:05 108 117 565 436 486 -10.3 2.5e+15 4.0e+30 70 C2 C3 PHTX DST Java Movie
    1998/04/12 18:55:05 82 52 117 64 0 -2.6*1 9.0e+14 6.1e+28 78 C2 C3 PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/12 18:55:05 277 59 370 242 0 -26.0*1 1.8e+14 1.2e+29 265 C2 C3 PHTX DST Java Movie Poor Event
    1998/04/12 23:27:05 262 47 565 469 193 -17.2*1 3.5e+14 5.6e+29 267 C2 C3 PHTX DST Java Movie
    1998/04/13 04:26:05 113 123 468 499 489 2.0 7.7e+14*2 8.5e+29*2 66 C2 C3 SXT PHTX DST Java Movie Partial Halo
    1998/04/13 16:27:06 292 29 172 161 0 -6.4*1 5.9e+13*2 8.8e+27*2 295 C2 C3 SXT PHTX DST Java Movie Only 3 points; Only C2
    1998/04/13 18:27:05 53 14 933 --- --- --- ---- ---- 61 C2 C3 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only 2 points; Only C2
    1998/04/13 18:27:05 212 71 231 195 0 -14.1*1 1.4e+14*2 3.7e+28*2 188 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/14 05:26:22 92 91 918 1179 1062 27.7 6.3e+15 2.6e+31 58 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/14 17:55:05 184 13 105 131 147 0.6*1 ---- ---- 180 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1998/04/14 19:55:05 76 29 452 406 425 -2.5*1 6.3e+14 6.4e+29 88 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.
    1998/04/15 01:55:05 303 8 53 121 135 0.8*1 ---- ---- 249 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/15 07:55:05 335 49 691 611 666 -5.9 3.5e+15 8.4e+30 337 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/15 13:55:05 339 48 589 520 536 -6.9 7.4e+14 1.3e+30 328 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/15 17:55:05 341 51 445 431 421 -1.4 4.0e+14 4.0e+29 335 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/16 01:55:05 336 32 487 507 495 1.1 1.2e+15 1.4e+30 325 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/16 12:55:05 68 40 645 764 763 13.9*1 4.1e+14 8.5e+29 64 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/16 16:55:05 297 49 470 495 495 2.0*1 7.4e+14 8.1e+29 292 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/16 18:27:05 217 87 583 758 740 15.5*1 8.9e+14 1.5e+30 219 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/01/12; Poor Event
    1998/04/16 20:38:37 236 129 586 563 582 -1.8*1 4.2e+15*2 7.3e+30*2 217 C2 C3 195 SXT PHTX DST Java Movie Only C3; Partial Halo
    1998/04/16 23:02:55 291 65 488 487 488 -0.1*1 1.5e+15 1.7e+30 293 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/17 07:47:25 219 41 301 460 591 15.8*1 4.5e+13 2.0e+28 214 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1998/04/18 21:36:12 300 66 512 524 514 1.3 6.4e+15 8.4e+30 304 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1998/04/19 01:33:17 307 31 311 306 298 -0.5*1 9.2e+14 4.5e+29 301 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.
    1998/04/19 15:40:57 304 19 559 406 517 -10.1 ---- ---- 304 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/20 03:16:27 237 43 316 378 418 6.9*1 5.3e+15 2.7e+30 231 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/20 07:05:01 87 106 379 339 336 -2.6 2.7e+15 1.9e+30 102 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/20 10:07:11 284 >243 1863 2063 1944 43.5*1 2.4e+16*2 4.1e+32*2 278 C2 C3 195 SXT PHTX DST Java Movie UVCS The width was changed from 165 to 243 degree on 2012/01/31; Uncertain Width; Partial Halo
    1998/04/20 17:27:05 286 14 246 278 308 2.1 ---- ---- 308 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/20 17:59:33 83 19 152 159 225 1.3*1 ---- ---- 84 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/21 01:40:36 92 88 418 457 455 2.8 2.9e+16 2.5e+31 100 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/21 02:13:53 308 17 583 456 0 -44.7*1 ---- ---- 308 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/21 15:19:39 225 39 443 671 626 14.7*1 3.8e+14 3.8e+29 224 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/21 19:03:35 292 62 527 614 574 6.1 1.9e+16 2.6e+31 292 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/21 20:46:04 95 65 417 352 388 -3.3 1.1e+16 9.7e+30 93 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/22 05:44:39 230 36 395 503 447 6.7 3.1e+14 2.4e+29 230 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1998/04/23 04:26:05 64 15 461 597 1113 46.1*1 ---- ---- 65 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/23 05:27:07 86 69 ---- --- --- --- 8.2e+14*2 4.1e+24*2 108 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2008/10/07; Only 1 point; Only C2
    1998/04/23 05:55:22 Halo 360 1691 1466 1649 -44.4*1 5.5e+15*2 7.9e+31*2 116 C2 C3 195 SXT PHTX DST Java Movie The first C2 appearance time was revised from 05:27UT to 05:55UT on 2008/10/07 by SY.
    1998/04/23 06:55:20 308 20 646 565 593 -7.6 8.1e+14 1.7e+30 306 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/24 08:55:19 100 84 1184 1062 1128 -17.8 3.5e+15 2.5e+31 112 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/25 05:35:07 54 22 151 143 0 -1.3*1 7.0e+12 8.0e+26 55 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/25 15:11:26 95 73 349 265 231 -5.4 1.3e+15 7.7e+29 85 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/25 18:38:10 70 17 324 331 382 1.9 ---- ---- 68 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/25 22:10:54 300 16 449 498 753 17.3*1 ---- ---- 294 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only 3 points
    1998/04/26 00:36:21 78 31 262 380 332 4.2*1 6.3e+14 2.2e+29 74 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/26 15:20:29 110 12 448 582 1068 46.9*1 ---- ---- 106 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/27 00:00:40 90 22 357 276 91 -8.6 2.5e+14 1.6e+29 88 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/27 00:27:42 271 29 280 327 395 4.3*1 3.0e+14 1.2e+29 276 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/27 03:01:57 110 40 760 734 747 -2.5*1 1.4e+15 4.0e+30 103 C2 C3 195 SXT PHTX DST Java Movie
    1998/04/27 08:56:06 Halo (OA) 360 1385 1743 1696 74.4 2.2e+16*2 2.2e+32*2 79 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/27 21:37:56 89 15 563 736 771 18.4*1 ---- ---- 84 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/28 07:34:03 68 19 419 532 573 9.8*1 ---- ---- 73 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/28 23:43:05 63 26 348 403 486 6.5*1 5.1e+14 3.1e+29 63 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/29 05:31:36 148 85 327 250 0 -21.0*1 1.1e+14*2 6.0e+28*2 118 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1998/04/29 06:27:05 118 18 271 256 0 -3.4*1 ---- ---- 110 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1998/04/29 06:27:05 67 40 141 0 0 -6.4*1 3.1e+14 3.1e+28 68 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/29 09:27:49 62 50 119 66 0 -7.5*1 1.4e+14 9.7e+27 66 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1998/04/29 15:01:09 61 38 202 111 0 -34.6*1 1.9e+14*2 3.9e+28*2 66 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2
    1998/04/29 16:58:54 Halo (BA) 360 1374 1151 1250 -44.8*1 1.0e+16*2 9.8e+31*2 336 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1998/04/30 12:08:33 50 8 431 348 0 -48.7*1 ---- ---- 54 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C2
    1998/04/30 19:47:28 97 17 378 304 90 -10.6*1 ---- ---- 93 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C3
    1998/04/30 20:25:08 271 45 363 249 0 -20.7*1 1.7e+14*2 1.1e+29*2 272 C2 C3 195 SXT PHTX DST Java Movie Poor Event

    *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).