• 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
    2021/05/01 00:12:05 115 12 322 417 863 29.2*1 ---- ---- 112 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/01 00:48:05 246 14 555 634 919 26.4*1 ---- ---- 245 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/01 15:36:05 259 37 127 159 326 4.0*1 2.0e+14 1.6e+28 261 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/02 02:12:05 77 53 165 392 355 5.3 3.8e+15 5.2e+29 78 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/02 12:24:05 85 85 285 338 324 2.2*1 3.7e+15 1.5e+30 85 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/03 02:36:05 90 50 159 192 283 2.6*1 1.1e+14 1.4e+28 98 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/03 08:12:05 20 5 381 152 0 -133.1*1 ---- ---- 23 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/03 10:36:06 87 28 174 175 176 0.0*1 1.3e+13 2.0e+27 79 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/03 21:36:05 263 76 309 194 161 -6.0 1.8e+15 8.6e+29 259 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/04 07:00:05 76 51 183 186 213 0.5*1 1.0e+14 1.7e+28 83 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/04 11:48:05 81 26 126 75 0 -11.5*1 8.1e+13 6.4e+27 87 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/05 01:25:41 191 10 487 204 0 -273.9*1 ---- ---- 198 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/05 16:24:05 77 80 223 290 279 2.2*1 3.0e+15 7.5e+29 76 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/05 23:12:10 83 57 264 284 314 1.6*1 8.1e+14 2.8e+29 77 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/06 21:12:09 126 55 382 436 798 22.2*1 1.4e+14 1.1e+29 112 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/07 01:25:43 73 58 436 250 0 -36.3*1 1.0e+14 9.8e+28 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/07 04:17:43 81 49 485 407 0 -18.4*1 8.2e+13 9.6e+28 89 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/07 07:24:12 94 26 410 448 806 21.2*1 2.2e+13 1.9e+28 86 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/07 12:00:05 64 34 247 321 810 26.1*1 3.8e+13 1.2e+28 67 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/07 13:36:16 120 14 346 299 0 -17.2*1 ---- ---- 119 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/07 19:24:05 90 114 754 647 712 -10.0 3.9e+15 1.1e+31 79 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/08 13:25:42 349 6 737 378 0 -539.1*1 ---- ---- 349 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2021/05/09 12:00:05 339 284 266 250 167 -2.4*1 3.0e+14*2 1.1e+29*2 265 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Partial Halo
    2021/05/09 12:48:05 77 13 330 347 403 2.9*1 ---- ---- 81 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/09 15:05:52 64 90 603 610 607 0.6 4.0e+15 7.3e+30 78 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/10 15:12:10 63 35 274 354 540 11.0*1 6.4e+11 2.4e+26 73 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/10 20:56:53 79 48 264 266 282 0.5*1 1.8e+14 6.3e+28 88 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/11 00:36:05 295 7 269 295 500 7.8*1 ---- ---- 289 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/11 18:00:05 275 7 208 203 0 -2.6*1 ---- ---- 271 C2 C3 PHTX DST Java Movie 0.5; Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/11 23:12:12 285 11 167 155 0 -4.7*1 ---- ---- 279 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/13 01:48:05 101 7 276 334 697 21.1*1 ---- ---- 105 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/13 09:12:09 104 13 198 238 355 4.6*1 ---- ---- 104 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/13 13:36:16 274 18 246 231 0 -5.8*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/13 13:48:05 106 96 116 81 0 -4.7*1 1.8e+14 1.2e+28 117 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/13 15:36:05 218 44 222 290 417 6.3*1 6.0e+13 1.5e+28 221 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/13 19:36:05 9 140 204 263 473 8.4*1 2.4e+14*2 4.9e+28*2 38 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Partial Halo
    2021/05/15 17:00:05 279 41 94 80 0 -1.2*1 2.0e+14 9.0e+27 280 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/16 03:48:05 80 58 212 192 0 -3.6*1 2.7e+14 6.0e+28 97 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/16 05:48:05 87 58 208 124 0 -14.2*1 1.5e+14 3.3e+28 93 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/17 09:36:05 64 8 462 373 0 -61.4*1 ---- ---- 67 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/17 20:00:06 97 61 190 172 0 -5.8*1 4.0e+13 7.3e+27 99 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/17 23:12:11 91 51 136 155 295 3.0*1 4.5e+13 4.2e+27 96 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/18 02:48:05 95 60 302 383 722 19.9*1 2.3e+14 1.1e+29 110 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/18 06:36:07 100 43 257 271 393 3.9*1 5.9e+13 1.9e+28 101 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/18 09:12:09 102 36 242 246 281 0.9*1 9.7e+13 2.8e+28 102 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/19 03:48:05 262 48 274 395 1066 45.9*1 8.1e+13 3.0e+28 276 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/19 16:00:06 272 26 227 253 493 8.3*1 1.8e+13 4.8e+27 273 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/19 17:48:05 272 32 255 251 192 -1.3*1 9.1e+13 3.0e+28 274 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Only C2
    2021/05/19 18:24:05 92 62 176 230 334 3.9*1 4.6e+14 7.2e+28 93 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/20 01:25:42 268 38 195 140 0 -12.7*1 7.5e+13 1.4e+28 273 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/20 11:48:05 97 53 77 11 0 -4.3*1 2.3e+14 6.9e+27 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/20 13:36:14 275 58 176 116 0 -13.3*1 6.2e+13 9.5e+27 273 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/20 18:12:05 103 76 222 380 404 6.2*1 1.5e+14 3.6e+28 101 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/21 09:36:06 103 72 380 484 955 34.5*1 1.1e+14 7.8e+28 87 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/21 15:48:06 288 95 220 425 372 5.7 5.7e+15 1.4e+30 296 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/22 04:00:05 96 79 366 603 1430 84.2*1 8.1e+13 5.5e+28 95 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/22 07:36:06 102 78 412 619 1312 68.9*1 5.0e+14 4.2e+29 95 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/05/22 08:48:05 Halo 360 381 434 413 2.5 1.8e+15*2 1.3e+30*2 94 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/22 22:12:05 283 149 459 472 480 1.3*1 7.0e+14*2 7.4e+29*2 307 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/05/23 10:12:05 284 121 392 370 302 -3.2*1 6.3e+14*2 4.9e+29*2 276 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Partial Halo
    2021/05/23 11:48:05 271 138 384 267 245 -7.6*1 8.6e+14*2 6.3e+29*2 287 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/05/23 17:24:06 216 8 518 252 0 -173.0*1 ---- ---- 218 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/24 01:25:43 276 60 437 479 582 7.7*1 1.8e+14 1.7e+29 280 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/24 05:36:05 119 56 148 161 267 2.2*1 1.5e+14 1.7e+28 117 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/24 14:36:05 276 95 129 266 288 3.5*1 1.6e+15 1.3e+29 280 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/25 11:36:05 91 37 320 445 920 34.4*1 4.4e+13 2.3e+28 92 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/25 18:36:05 253 86 394 663 554 11.1 2.4e+15 1.8e+30 246 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/27 04:48:05 100 93 330 272 74 -6.0*1 2.8e+14 1.5e+29 102 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/05/27 15:48:05 266 73 119 98 0 -3.6*1 4.5e+14 3.2e+28 282 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/28 00:00:05 252 18 357 283 0 -12.1*1 ---- ---- 259 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/28 14:48:06 114 12 345 500 976 38.1*1 ---- ---- 114 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/05/28 23:12:12 261 197 971 974 974 0.5 6.8e+15*2 3.2e+31*2 279 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/05/29 00:12:06 106 80 415 427 455 1.9*1 3.7e+14 3.2e+29 106 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/05/30 02:48:07 83 40 145 198 446 7.9*1 3.0e+14 3.1e+28 89 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/30 06:24:06 89 24 130 86 0 -7.3*1 7.4e+13 6.2e+27 93 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/30 17:00:35 325 8 421 398 0 -21.3*1 ---- ---- 320 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/05/31 07:12:05 76 12 226 288 552 12.7*1 ---- ---- 86 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very 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).