• 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
    2020/05/01 11:36:05 7 13 307 90 0 -157.3*1 ---- ---- 10 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/03 20:56:53 266 50 229 262 310 2.4*1 ---- ---- 262 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/05 15:24:05 271 22 106 132 212 1.6*1 ---- ---- 258 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/07 20:24:05 269 36 70 24 0 -3.9*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/09 19:00:05 267 46 172 110 0 -4.4*1 ---- ---- 266 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2020/05/11 00:36:05 268 31 334 508 1365 78.8*1 ---- ---- 273 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/11 08:36:07 95 51 173 124 0 -10.1*1 ---- ---- 96 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Only C2
    2020/05/11 16:48:05 86 40 277 362 1149 55.6*1 ---- ---- 90 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/12 10:24:05 88 32 195 266 298 3.1*1 ---- ---- 87 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/12 19:48:05 79 31 243 362 439 7.4*1 ---- ---- 85 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/13 11:24:05 265 39 129 84 0 -6.6*1 ---- ---- 262 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/14 13:25:40 256 27 139 121 0 -4.0*1 ---- ---- 259 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/15 06:12:13 257 41 102 123 203 1.5*1 ---- ---- 264 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2020/05/15 22:48:05 211 9 396 --- --- --- ---- ---- 214 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 2 points; Only C2
    2020/05/16 21:23:29 103 23 128 128 112 -0.2*1 ---- ---- 102 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/17 06:00:05 267 9 238 271 432 6.6*1 ---- ---- 267 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2020/05/17 19:00:05 80 21 163 177 337 3.7*1 ---- ---- 79 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/19 13:25:42 29 8 246 11 0 -353.5*1 ---- ---- 38 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/05/20 08:24:05 266 36 77 97 296 3.5*1 ---- ---- 264 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/22 03:47:14 351 9 232 --- --- --- ---- ---- 348 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 2 points; Only C2
    2020/05/22 19:19:19 88 24 204 148 0 -35.2*1 ---- ---- 83 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/23 20:24:05 86 33 72 39 0 -12.6*1 ---- ---- 86 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/24 07:24:05 98 38 233 246 338 2.7*1 ---- ---- 105 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/24 10:24:05 95 54 104 132 251 2.3*1 ---- ---- 104 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/25 14:00:05 17 12 671 910 2823 332.1*1 ---- ---- 22 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/05/25 14:12:05 243 8 247 266 546 10.3*1 ---- ---- 247 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/26 00:36:06 270 95 142 216 289 3.2*1 ---- ---- 266 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/26 10:36:05 257 36 172 185 271 2.0*1 ---- ---- 278 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/26 17:24:05 73 18 244 250 315 1.7*1 ---- ---- 80 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/27 06:00:06 99 17 108 129 222 1.8*1 ---- ---- 104 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/27 07:00:05 270 23 208 179 0 -6.3*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/27 09:48:05 259 15 219 243 459 7.7*1 ---- ---- 270 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/27 11:24:06 353 9 409 683 2480 260.1*1 ---- ---- 353 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2020/05/27 18:36:05 95 51 726 664 0 -35.5*1 ---- ---- 79 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/27 20:56:55 275 74 122 224 288 3.4*1 ---- ---- 273 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2020/05/28 03:12:09 102 19 173 217 406 6.6*1 ---- ---- 102 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/28 11:00:06 91 44 555 344 0 -116.8*1 ---- ---- 78 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/28 21:12:11 275 23 187 192 214 0.5*1 ---- ---- 273 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2020/05/29 08:00:05 95 37 337 301 0 -13.2*1 ---- ---- 84 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/29 11:24:05 100 52 347 288 0 -21.9*1 ---- ---- 83 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/29 15:12:05 98 46 204 193 0 -2.8*1 ---- ---- 89 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/29 17:36:05 92 34 210 120 0 -19.3*1 ---- ---- 88 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2020/05/30 01:25:43 95 39 269 339 331 2.8 ---- ---- 100 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2020/05/30 08:48:05 275 23 146 180 399 6.5*1 ---- ---- 279 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).