• 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
    2020/04/01 00:48:05 144 9 215 373 1580 103.1*1 ---- ---- 140 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/04/01 02:00:05 107 14 274 390 932 35.0*1 ---- ---- 100 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/01 03:24:05 138 8 462 318 0 -134.3*1 ---- ---- 137 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/01 10:24:05 140 7 214 185 0 -15.9*1 ---- ---- 136 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/01 15:26:55 96 36 80 62 0 -5.8*1 ---- ---- 99 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/02 00:24:05 87 49 157 34 0 -43.9*1 ---- ---- 85 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/03 23:12:11 205 6 653 --- --- --- ---- ---- 212 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 2 points; Only C2
    2020/04/05 08:36:05 92 27 128 138 309 3.3*1 ---- ---- 97 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/05 15:05:47 95 33 200 246 391 5.3*1 ---- ---- 95 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/04/05 19:12:05 95 77 167 311 473 9.2*1 ---- ---- 93 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/04/06 21:36:05 139 13 530 425 0 -94.0*1 ---- ---- 134 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/06 23:12:10 274 43 28 22 0 -0.7*1 ---- ---- 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/08 15:05:47 247 11 447 558 1489 89.4*1 ---- ---- 254 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/10 03:47:13 204 7 372 760 2632 297.8*1 ---- ---- 207 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/04/10 23:12:11 272 41 137 100 0 -10.6*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/12 13:25:40 273 52 268 309 428 5.5*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/04/13 05:36:05 54 15 799 1136 2158 188.9*1 ---- ---- 60 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/14 14:00:05 179 4 411 72 0 -469.9*1 ---- ---- 182 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/04/15 00:18:20 286 104 80 132 401 7.3*1 ---- ---- 298 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/15 00:24:26 95 102 180 191 239 1.5*1 ---- ---- 101 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C3
    2020/04/16 14:24:05 94 53 298 326 388 3.2*1 ---- ---- 98 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2020/04/18 23:36:05 347 3 575 600 850 17.4*1 ---- ---- 346 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/20 08:36:05 187 7 360 221 0 -134.7*1 ---- ---- 190 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/04/21 03:12:10 187 16 410 426 564 6.8*1 ---- ---- 188 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/04/21 22:24:05 92 39 102 104 184 1.0*1 ---- ---- 97 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/23 03:36:05 238 9 367 449 1208 57.7*1 ---- ---- 240 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/23 14:12:05 89 49 83 100 162 0.9*1 ---- ---- 83 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/04/24 03:12:08 87 41 101 106 141 0.4*1 ---- ---- 92 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/24 18:48:05 87 38 300 281 248 -1.7*1 ---- ---- 98 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2020/04/28 08:00:06 266 20 321 303 0 -7.7*1 ---- ---- 260 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/28 08:36:07 78 16 135 167 505 10.1*1 ---- ---- 81 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/04/28 16:12:05 276 74 92 172 218 2.1*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2020/04/29 11:48:05 267 22 106 123 183 1.1*1 ---- ---- 272 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).