• 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
    2018/12/01 00:12:05 235 9 252 304 623 16.7*1 ---- ---- 235 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/12/01 06:48:05 145 44 206 200 114 -1.3*1 5.5e+13 1.2e+28 148 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/01 18:36:05 277 64 121 134 247 2.1*1 3.9e+14 2.9e+28 278 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/02 02:00:05 104 16 234 289 629 15.0*1 ---- ---- 100 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/03 05:00:05 272 24 202 292 379 5.5*1 3.0e+13 6.2e+27 271 C2 C3 PHTX DST Java Movie
    2018/12/04 01:25:40 17 10 963 484 0 -719.0*1 ---- ---- 19 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2
    2018/12/05 09:36:07 337 7 323 312 0 -6.0*1 ---- ---- 334 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/06 00:36:05 86 43 203 136 0 -9.4*1 4.9e+13 1.0e+28 90 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/12/06 11:00:06 248 13 131 140 304 3.2*1 ---- ---- 247 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/07 08:00:05 256 44 145 194 587 13.8*1 5.5e+12 5.8e+26 259 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/12/07 09:48:05 107 26 225 231 291 1.5*1 1.1e+14 2.7e+28 105 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/12/07 17:00:06 251 15 222 242 394 4.8*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/07 19:12:05 262 40 208 139 0 -29.2*1 1.1e+13 2.3e+27 263 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/12/08 18:36:05 174 13 630 833 1721 114.2*1 ---- ---- 173 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/12/10 20:12:05 109 13 270 427 1227 62.9*1 ---- ---- 103 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/11 06:24:05 83 9 339 275 0 -12.8*1 ---- ---- 88 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/12/12 04:48:05 91 42 191 297 355 4.9*1 8.7e+14 1.6e+29 94 C2 C3 PHTX DST Java Movie
    2018/12/15 11:48:05 229 11 284 94 0 -67.4*1 ---- ---- 237 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/16 00:48:07 278 25 209 232 293 2.5*1 7.9e+13 1.7e+28 270 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/12/16 12:00:05 282 12 219 310 572 14.6*1 ---- ---- 277 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/12/17 19:48:05 271 22 231 171 0 -18.0*1 3.6e+13 9.5e+27 271 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/20 01:36:10 275 42 275 274 251 -0.5*1 3.1e+13 1.2e+28 274 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/21 08:24:05 99 48 208 246 600 13.6*1 5.9e+13 1.3e+28 91 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/22 12:00:05 83 10 215 242 706 19.2*1 ---- ---- 88 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/24 06:48:05 90 63 452 418 434 -1.9*1 1.6e+15 1.6e+30 96 C2 C3 PHTX DST Java Movie
    2018/12/28 03:47:13 335 6 217 --- --- --- ---- ---- 332 C2 C3 PHTX DST Java Movie Very Poor Event; Only 2 points; Only C2
    2018/12/28 18:00:05 91 26 339 281 0 -44.0*1 3.6e+13 2.1e+28 87 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/28 22:36:05 67 28 198 304 326 4.1*1 4.8e+14 9.5e+28 71 C2 C3 PHTX DST Java Movie
    2018/12/28 23:12:11 332 10 469 255 0 -219.5*1 ---- ---- 327 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/12/29 22:36:05 81 17 272 287 356 2.8*1 ---- ---- 82 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/12/30 04:48:06 78 23 240 308 374 4.7*1 8.9e+13 2.6e+28 83 C2 C3 PHTX DST Java Movie Poor Event
    2018/12/31 09:48:05 251 14 333 458 557 12.5*1 ---- ---- 251 C2 C3 PHTX DST Java Movie 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).