• 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
    2020/08/01 16:12:05 82 13 170 163 125 -0.6*1 ---- ---- 92 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/02 00:48:05 265 55 182 134 0 -17.4*1 ---- ---- 268 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/03 01:48:05 267 38 107 92 0 -4.0*1 ---- ---- 269 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/03 22:24:05 93 46 141 118 0 -3.2*1 ---- ---- 94 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/04 00:00:05 272 48 261 397 509 10.0*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/04 20:00:05 274 42 269 251 0 -5.3*1 ---- ---- 267 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/05 14:24:05 89 39 121 193 495 10.1*1 ---- ---- 95 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/06 02:24:05 94 40 164 77 0 -25.2*1 ---- ---- 80 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/06 02:48:05 274 34 283 382 884 31.5*1 ---- ---- 275 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/06 12:12:05 50 152 156 115 0 -4.6*1 ---- ---- 59 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2; Partial Halo
    2020/08/07 10:48:05 81 22 266 131 0 -39.6*1 ---- ---- 84 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/07 12:48:05 297 12 334 568 1734 126.0*1 ---- ---- 291 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/07 15:48:05 92 16 244 296 307 2.6*1 ---- ---- 88 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/08 16:48:05 255 16 250 274 335 2.8*1 ---- ---- 260 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/08 20:57:31 80 12 198 214 269 1.8*1 ---- ---- 79 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
    2020/08/09 01:25:40 124 14 705 544 0 -159.7*1 ---- ---- 116 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/09 04:00:06 94 33 142 107 0 -7.6*1 ---- ---- 95 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/09 07:00:05 259 50 112 127 270 2.9*1 ---- ---- 270 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/09 17:36:05 261 48 57 60 91 0.2*1 ---- ---- 265 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/10 08:12:06 257 45 178 215 234 1.7*1 ---- ---- 259 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
    2020/08/12 04:00:05 87 35 146 101 0 -24.9*1 ---- ---- 92 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/13 10:36:05 276 39 146 116 0 -9.3*1 ---- ---- 276 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/13 17:24:05 85 43 249 253 313 1.6*1 ---- ---- 93 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/14 04:17:42 115 27 161 138 0 -10.1*1 ---- ---- 110 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/14 06:36:05 118 23 136 165 352 4.7*1 ---- ---- 109 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/14 11:24:05 83 24 190 223 571 12.3*1 ---- ---- 72 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/15 07:12:06 268 58 298 264 172 -3.3 ---- ---- 276 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30
    2020/08/15 12:48:05 88 49 95 56 0 -9.8*1 ---- ---- 88 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/15 15:24:05 260 21 108 170 293 3.8*1 ---- ---- 267 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/16 00:00:06 99 81 361 558 496 9.1*1 ---- ---- 93 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30
    2020/08/16 05:48:05 266 61 300 261 0 -6.2*1 ---- ---- 274 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30
    2020/08/16 18:12:07 110 123 437 595 612 12.5 ---- ---- 105 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
    2020/08/16 22:36:05 181 12 679 658 0 -29.7*1 ---- ---- 178 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only 3 points; Only C2
    2020/08/17 01:25:40 275 48 412 344 0 -33.7*1 ---- ---- 280 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Only C2
    2020/08/17 08:00:05 95 19 245 254 300 1.4*1 ---- ---- 102 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
    2020/08/17 23:24:05 285 67 141 171 229 1.6*1 ---- ---- 283 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30
    2020/08/18 03:24:05 102 28 169 146 0 -5.5*1 ---- ---- 100 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/18 06:00:05 105 33 120 72 0 -24.6*1 ---- ---- 104 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/18 19:12:06 265 31 160 145 0 -2.0*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/19 11:24:05 103 52 33 32 18 -0.0*1 ---- ---- 98 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/20 00:24:05 275 10 185 158 0 -5.9*1 ---- ---- 266 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
    2020/08/20 03:12:11 87 23 251 232 0 -5.4*1 ---- ---- 90 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/20 06:36:05 278 22 258 284 385 4.0*1 ---- ---- 275 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/20 15:48:05 69 13 325 108 0 -72.5*1 ---- ---- 81 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/21 17:08:47 280 26 218 213 140 -1.2*1 ---- ---- 273 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/21 20:40:09 118 10 187 221 540 11.1*1 ---- ---- 113 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/21 23:12:11 56 11 349 306 0 -59.4*1 ---- ---- 57 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only 3 points; Only C2
    2020/08/21 23:36:07 277 29 233 211 0 -4.5*1 ---- ---- 275 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/22 01:48:06 108 30 225 327 448 8.6*1 ---- ---- 101 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/22 16:48:06 112 31 197 412 471 10.2*1 ---- ---- 102 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/22 17:00:06 79 16 200 271 666 17.7*1 ---- ---- 74 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/22 23:12:22 274 26 169 200 326 4.2*1 ---- ---- 276 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/23 14:24:05 173 16 408 580 1596 103.9*1 ---- ---- 169 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
    2020/08/24 07:00:05 109 11 290 384 584 13.8*1 ---- ---- 104 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/24 12:00:05 81 44 57 0 0 -7.2*1 ---- ---- 84 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/24 22:24:05 277 17 211 248 364 4.3*1 ---- ---- 275 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/27 00:48:05 277 69 123 175 229 2.0*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/27 10:36:05 93 87 241 348 311 3.1 ---- ---- 85 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30
    2020/08/28 03:47:14 281 11 284 419 607 15.3*1 ---- ---- 284 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
    2020/08/28 14:36:05 284 11 222 258 358 4.6*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
    2020/08/29 00:00:05 89 16 281 339 478 8.4*1 ---- ---- 91 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/29 10:48:05 289 11 189 220 531 10.6*1 ---- ---- 284 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
    2020/08/29 15:36:05 287 11 196 163 0 -4.8*1 ---- ---- 285 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/29 19:48:05 288 10 218 204 79 -2.0*1 ---- ---- 275 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/30 01:25:44 261 42 117 213 286 3.5*1 ---- ---- 253 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/31 02:12:05 77 53 213 182 0 -5.2*1 ---- ---- 84 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Poor Event
    2020/08/31 03:36:06 81 91 63 58 0 -0.2*1 ---- ---- 85 C2 C3 PHTX DST Java Movie Fixed the MVI roll angle issue on 2026-01-30; Only C2

    *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).