• 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
    2021/08/02 01:48:05 206 6 442 525 1252 59.5*1 ---- ---- 208 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/02 07:48:05 252 12 428 525 796 22.0*1 ---- ---- 253 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/02 16:48:06 258 12 222 282 512 10.1*1 ---- ---- 254 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/04 03:48:05 259 9 266 325 704 19.0*1 ---- ---- 256 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/04 07:48:05 272 36 233 290 585 12.9*1 1.3e+14 3.5e+28 256 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/04 09:36:05 70 9 130 192 514 10.7*1 ---- ---- 77 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/04 13:25:41 258 41 177 194 318 3.2*1 1.2e+14 1.8e+28 265 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/04 18:36:05 267 58 154 183 238 1.7*1 2.5e+14 3.0e+28 256 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/05 07:12:06 17 9 518 397 0 -167.8*1 ---- ---- 19 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2021/08/05 08:48:23 254 95 153 239 230 2.0*1 4.1e+15 4.8e+29 264 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/06 05:48:05 275 18 162 216 448 8.0*1 ---- ---- 268 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/06 13:12:11 22 8 248 284 614 14.1*1 ---- ---- 30 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/06 21:12:11 278 16 132 101 0 -2.9*1 ---- ---- 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/08/07 06:12:09 29 14 273 292 571 10.8*1 ---- ---- 36 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/08 12:36:11 269 32 213 259 295 2.5*1 1.9e+14 4.2e+28 261 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/09 12:36:05 269 6 215 269 456 8.4*1 ---- ---- 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/08/09 17:24:05 270 54 239 569 535 12.1*1 1.9e+15 5.5e+29 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/10 11:36:06 276 18 366 409 433 3.5*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/10 18:48:05 275 20 347 295 0 -11.3*1 2.8e+13 1.7e+28 275 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/11 02:12:09 244 13 182 255 516 10.8*1 ---- ---- 246 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/11 02:48:05 270 10 415 470 553 8.1*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/11 12:36:11 269 18 431 586 601 14.3*1 ---- ---- 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/08/12 03:12:10 275 32 100 79 0 -2.0*1 9.2e+13 4.6e+27 277 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/12 09:36:10 251 99 274 261 241 -1.0 1.1e+15 4.3e+29 250 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/12 14:12:10 124 67 534 381 341 -14.6*1 7.8e+14 1.1e+30 127 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/12 21:48:06 118 77 312 286 61 -4.6*1 3.0e+14 1.5e+29 110 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/13 03:24:06 273 9 241 284 835 27.2*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2021/08/13 15:12:11 269 13 176 119 0 -22.1*1 ---- ---- 269 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/14 00:36:05 73 116 140 256 363 5.5*1 1.1e+15 1.1e+29 65 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/14 09:36:05 111 27 278 333 586 11.9*1 1.5e+14 5.7e+28 109 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/14 19:36:05 99 37 614 420 0 -90.7*1 5.5e+13 1.0e+29 103 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/15 00:12:05 93 21 289 341 509 8.5*1 1.5e+14 6.1e+28 94 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/15 00:24:05 227 9 246 102 0 -69.5*1 ---- ---- 235 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/15 05:00:05 61 12 235 270 337 3.0*1 ---- ---- 72 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/15 05:12:07 261 30 285 346 664 16.0*1 1.8e+14 7.4e+28 260 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/15 05:48:05 106 132 231 284 361 4.0*1 9.0e+14*2 2.4e+29*2 106 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/08/15 18:12:07 98 74 192 222 374 4.7*1 1.5e+14 2.7e+28 115 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/16 00:00:06 110 42 182 159 0 -4.4*1 1.3e+14 2.1e+28 106 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/16 08:12:05 267 41 174 229 596 14.1*1 2.9e+13 4.5e+27 260 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/16 11:48:05 265 28 183 122 0 -16.8*1 3.8e+13 6.4e+27 262 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/16 13:48:05 100 78 507 373 0 -26.9*1 4.6e+14 6.0e+29 111 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/16 22:00:05 265 30 211 257 605 14.0*1 4.2e+13 9.3e+27 266 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/17 11:12:05 93 66 477 377 0 -23.6*1 6.9e+14 7.8e+29 111 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/17 14:48:06 289 342 97 126 360 5.2*1 1.7e+14*2 8.1e+27*2 108 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2; Partial Halo
    2021/08/17 16:00:05 229 10 295 291 206 -1.9*1 ---- ---- 233 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/18 03:12:10 296 22 442 312 0 -21.1*1 2.0e+14 1.9e+29 290 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/18 14:36:05 34 5 421 797 2657 294.9*1 ---- ---- 38 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2021/08/18 15:26:54 95 43 98 140 171 1.1*1 6.6e+14 3.2e+28 93 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/08/19 03:12:09 100 84 163 278 271 2.9*1 3.0e+15 3.9e+29 106 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/19 17:48:05 110 24 345 439 869 28.3*1 3.5e+12 2.1e+27 108 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/19 23:12:10 84 86 254 195 118 -3.3 1.4e+15 4.6e+29 83 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/20 06:12:11 107 133 774 780 778 0.6 3.2e+15*2 9.6e+30*2 119 C2 C3 PHTX DST Java Movie yht_reformat; Fixed the PA issue on 2026-01-30; Partial Halo
    2021/08/21 03:24:05 264 41 298 442 1017 42.6*1 8.9e+12 3.9e+27 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/22 03:48:05 150 153 279 309 340 2.2*1 5.1e+14*2 2.0e+29*2 167 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Partial Halo
    2021/08/22 14:00:05 96 61 369 421 421 3.2*1 1.4e+15 9.4e+29 94 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/23 00:00:06 81 15 282 287 314 0.9*1 ---- ---- 88 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/23 06:48:05 Halo 360 440 565 552 8.5*1 3.1e+15*2 3.0e+30*2 84 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/24 06:36:06 276 131 435 486 460 2.6 7.0e+15*2 6.6e+30*2 290 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/08/24 13:25:43 94 151 289 239 0 -4.8*1 1.2e+15*2 5.0e+29*2 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/08/24 19:00:05 288 77 340 518 555 11.7*1 1.1e+15 6.4e+29 287 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/25 02:24:05 112 56 193 150 0 -9.0*1 5.3e+12 9.8e+26 112 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/25 10:36:07 301 13 278 282 292 0.4*1 ---- ---- 297 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/08/25 18:24:05 121 47 556 744 781 19.1*1 1.1e+15 1.7e+30 111 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/26 02:24:07 104 122 278 369 425 6.0*1 1.4e+15*2 5.4e+29*2 95 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/08/26 07:36:05 268 20 216 284 591 13.6*1 8.3e+13 1.9e+28 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/26 10:24:05 101 86 335 411 442 5.2*1 2.9e+13 1.6e+28 94 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/26 18:48:06 Halo 360 644 785 761 13.6 7.9e+14*2 1.6e+30*2 39 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/27 00:24:05 125 116 197 243 432 6.8*1 2.0e+14 3.8e+28 125 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Only C2
    2021/08/28 06:36:06 179 254 191 168 0 -3.7*1 1.4e+15*2 2.6e+29*2 181 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2; Partial Halo
    2021/08/28 13:25:43 265 79 681 514 636 -12.6 3.8e+15 8.9e+30 246 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/28 21:36:06 242 33 539 600 617 6.4*1 2.0e+15 2.9e+30 237 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/28 23:12:10 127 10 215 303 668 18.4*1 ---- ---- 121 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/08/29 12:36:05 237 41 559 603 600 4.0 1.2e+15 1.8e+30 240 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/29 20:24:05 262 87 1060 1051 1057 -1.1 1.4e+15 8.0e+30 254 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/30 02:12:05 262 70 884 875 876 -1.3 1.1e+15 4.4e+30 235 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/30 15:48:05 244 23 96 100 172 0.9*1 6.9e+13 3.2e+27 245 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/30 19:00:05 245 16 167 215 601 14.8*1 ---- ---- 248 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/08/30 20:48:05 245 16 531 347 0 -43.5*1 ---- ---- 251 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/08/30 21:36:06 91 32 120 66 0 -18.9*1 1.8e+13 1.3e+27 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/30 23:48:05 245 14 238 98 0 -48.1*1 ---- ---- 247 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/08/31 01:25:49 250 25 608 748 1061 37.7*1 2.5e+14 4.6e+29 250 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/08/31 12:36:05 265 88 811 748 794 -5.8 2.9e+15 9.5e+30 230 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30

    *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).