• 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
    2021/03/01 00:48:05 274 49 478 367 0 -48.3*1 1.4e+13 1.6e+28 277 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Only C2
    2021/03/01 14:24:06 263 58 320 357 404 3.4*1 ---- ---- 263 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/02 07:48:05 71 148 148 218 273 2.8*1 ---- ---- 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Partial Halo
    2021/03/02 08:36:05 259 17 254 314 482 8.8*1 ---- ---- 264 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/03/02 13:25:42 260 57 472 536 554 5.8*1 ---- ---- 257 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/02 19:00:06 262 57 84 145 198 1.6*1 1.0e+15 3.7e+28 265 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/03/03 10:48:06 277 49 116 169 210 1.6*1 3.2e+14 2.1e+28 276 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/03 21:36:06 247 36 295 284 248 -1.3*1 5.3e+14 2.3e+29 247 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/05 17:12:05 84 49 153 140 0 -1.9*1 ---- ---- 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/07 07:48:05 124 8 184 195 290 2.2*1 ---- ---- 122 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/07 11:36:05 230 15 265 350 659 16.8*1 ---- ---- 234 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/07 16:24:05 227 18 233 203 0 -6.0*1 ---- ---- 234 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/07 21:12:11 84 70 122 240 267 3.0*1 ---- ---- 77 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/08 00:36:05 245 10 180 250 763 24.0*1 ---- ---- 247 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/08 04:36:05 236 8 377 251 0 -84.4*1 ---- ---- 244 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/08 16:00:05 178 12 445 558 1142 50.2*1 ---- ---- 184 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/09 10:00:05 71 23 101 152 485 9.8*1 ---- ---- 77 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/09 23:48:05 122 10 347 298 0 -28.7*1 ---- ---- 114 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/12 14:36:05 94 64 209 455 1074 47.8*1 ---- ---- 103 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/15 00:12:05 73 11 148 86 0 -15.5*1 ---- ---- 77 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/16 08:24:06 178 226 231 366 339 4.2*1 ---- ---- 229 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/03/18 00:12:05 73 54 100 220 305 4.0*1 ---- ---- 68 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/18 03:24:05 128 23 292 296 307 0.5*1 ---- ---- 123 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/19 14:12:05 85 39 91 118 242 2.3*1 ---- ---- 91 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/20 01:25:45 55 172 337 502 469 7.5*1 ---- ---- 100 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Partial Halo
    2021/03/20 06:36:05 252 16 373 287 0 -33.5*1 ---- ---- 257 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/20 08:48:06 63 56 157 280 609 15.1*1 ---- ---- 71 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/20 10:12:05 112 43 375 355 308 -2.6*1 ---- ---- 119 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/21 06:24:05 90 23 212 218 257 1.0*1 ---- ---- 92 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/22 00:24:06 104 76 296 332 366 2.6*1 ---- ---- 112 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/22 02:12:06 298 84 189 152 0 -4.9*1 ---- ---- 309 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Only C2
    2021/03/23 00:12:05 113 33 127 156 322 3.9*1 ---- ---- 111 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/23 15:48:05 282 69 157 390 383 6.1 ---- ---- 288 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/25 04:12:05 127 40 267 311 390 4.2*1 ---- ---- 127 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/25 20:24:06 282 10 158 199 321 3.9*1 ---- ---- 279 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event
    2021/03/26 04:39:01 104 79 110 190 228 2.0*1 ---- ---- 102 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30
    2021/03/26 12:12:06 179 211 154 218 286 3.1*1 ---- ---- 219 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Partial Halo
    2021/03/26 23:24:05 282 23 129 94 0 -9.7*1 ---- ---- 283 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/27 03:36:05 214 10 462 549 1431 81.0*1 ---- ---- 215 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/27 10:36:05 99 80 93 53 0 -14.5*1 ---- ---- 112 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/27 16:00:05 94 78 47 53 110 0.5*1 ---- ---- 96 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event
    2021/03/29 15:48:05 265 49 209 228 370 4.2*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Poor Event; Only C2
    2021/03/30 05:00:06 119 9 139 100 0 -11.6*1 ---- ---- 116 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/30 18:00:06 36 67 148 173 372 5.3*1 ---- ---- 35 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; Very Poor Event; Only C2
    2021/03/31 03:24:05 281 62 190 399 618 15.8*1 ---- ---- 278 C2 C3 PHTX DST Java Movie Fixed the PA issue on 2026-01-30; 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).