• 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
    2019/04/02 05:24:06 88 34 262 200 0 -9.6*1 1.6e+14 5.4e+28 85 C3 PHTX DST Java Movie Poor Event; Only C3
    2019/04/03 05:12:06 88 28 425 422 418 -0.4*1 1.1e+14 1.0e+29 100 C3 PHTX DST Java Movie Poor Event; Only C3
    2019/04/03 18:58:05 103 20 293 360 638 17.2*1 1.0e+14 4.4e+28 100 C3 PHTX DST Java Movie Very Poor Event; Only C3
    2019/04/05 03:47:14 186 7 307 590 2017 171.0*1 ---- ---- 186 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2019/04/05 20:48:05 109 23 178 100 0 -12.4*1 1.0e+14 1.7e+28 108 C2 C3 PHTX DST Java Movie Only C2
    2019/04/07 00:24:05 48 8 231 352 969 38.3*1 ---- ---- 54 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2019/04/10 15:37:41 105 56 211 240 319 2.8*1 3.2e+14 7.2e+28 117 C2 C3 PHTX DST Java Movie
    2019/04/11 18:00:06 272 16 200 363 1103 53.9*1 ---- ---- 277 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2019/04/12 07:48:05 277 29 267 287 341 2.5*1 7.0e+13 2.5e+28 274 C2 C3 PHTX DST Java Movie Poor Event
    2019/04/13 12:30:05 266 15 240 141 0 -17.0*1 ---- ---- 269 C2 C3 PHTX DST Java Movie Very Poor Event; Only C3
    2019/04/14 18:48:05 182 5 367 482 1973 160.2*1 ---- ---- 183 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2
    2019/04/15 20:24:05 272 45 128 94 0 -5.5*1 1.8e+14 1.5e+28 268 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2019/04/16 03:12:09 273 30 68 75 167 1.1*1 3.9e+13 8.9e+26 272 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2019/04/17 10:12:05 93 45 126 184 492 9.7*1 1.7e+14 1.4e+28 100 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2019/04/18 11:12:05 91 60 219 297 698 19.3*1 3.2e+14 7.6e+28 86 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2019/04/19 06:36:05 272 53 218 212 165 -1.0*1 3.2e+13 7.5e+27 273 C2 C3 PHTX DST Java Movie Poor Event
    2019/04/19 17:00:05 270 48 235 272 485 8.0*1 7.2e+13 2.0e+28 273 C2 C3 PHTX DST Java Movie Only C2
    2019/04/20 01:25:38 272 65 398 429 462 3.4 1.2e+15 9.2e+29 267 C2 C3 PHTX DST Java Movie
    2019/04/20 09:48:05 276 56 382 438 734 18.0*1 5.2e+13 3.8e+28 278 C2 C3 PHTX DST Java Movie Poor Event
    2019/04/20 12:12:06 273 51 165 148 0 -2.6*1 1.1e+14 1.6e+28 281 C2 C3 PHTX DST Java Movie Only C2
    2019/04/20 21:24:05 272 42 162 122 0 -9.8*1 1.5e+13 2.0e+27 276 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2019/04/21 05:00:05 274 93 463 428 391 -3.9 3.3e+15 3.5e+30 276 C2 C3 PHTX DST Java Movie
    2019/04/21 19:12:05 221 20 130 171 287 3.1*1 9.8e+13 8.3e+27 225 C2 C3 PHTX DST Java Movie
    2019/04/21 20:56:54 285 16 340 325 248 -2.8*1 ---- ---- 287 C2 C3 PHTX DST Java Movie
    2019/04/22 03:24:05 269 55 422 500 903 28.6*1 3.4e+14 3.0e+29 278 C2 C3 PHTX DST Java Movie Only C2
    2019/04/23 13:25:42 75 34 56 64 153 1.0*1 4.4e+13 6.8e+26 81 C2 C3 PHTX DST Java Movie Poor Event
    2019/04/24 10:12:05 261 32 295 329 576 11.8*1 1.3e+13 5.9e+27 254 C2 C3 PHTX DST Java Movie Very Poor Event
    2019/04/24 21:25:46 10 5 401 287 0 -95.4*1 ---- ---- 12 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2019/04/26 02:12:26 6 7 252 300 840 27.5*1 ---- ---- 7 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2019/04/27 06:48:06 272 37 183 333 526 11.5*1 4.6e+14 7.8e+28 270 C2 C3 PHTX DST Java Movie
    2019/04/27 11:36:05 269 56 389 316 259 -6.0*1 1.1e+15 8.2e+29 267 C2 C3 PHTX DST Java Movie
    2019/04/27 14:24:05 265 53 211 327 371 5.4 4.7e+14 1.1e+29 275 C2 C3 PHTX DST Java Movie
    2019/04/28 06:00:05 278 15 257 281 362 3.1*1 ---- ---- 277 C2 C3 PHTX DST Java Movie Poor Event
    2019/04/28 08:24:05 237 108 347 384 432 3.9*1 7.2e+14 4.3e+29 248 C2 C3 PHTX DST Java Movie Poor Event
    2019/04/29 03:12:08 268 55 197 243 392 5.5*1 4.4e+13 8.5e+27 273 C2 PHTX DST Java Movie Poor Event
    2019/04/29 19:48:05 280 8 215 332 732 23.1*1 ---- ---- 275 C2 PHTX DST Java Movie Very Poor Event
    2019/04/30 12:24:05 83 71 250 194 0 -9.9*1 7.0e+14 2.2e+29 82 C2 C3 PHTX DST Java Movie
    2019/04/30 14:48:05 Halo 360 665 754 770 10.9*1 1.7e+15*2 3.8e+30*2 172 C2 C3 PHTX DST Java Movie
    2019/04/30 23:12:05 158 46 179 139 0 -9.1*1 1.9e+13 3.1e+27 161 C2 C3 PHTX DST Java Movie Poor Event; 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).