• 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
    2018/08/01 06:00:05 289 25 138 150 266 2.6*1 1.5e+13 1.4e+27 291 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/01 20:56:54 1 7 395 290 0 -88.7*1 ---- ---- 360 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/02 09:36:05 290 72 219 283 349 4.0 1.8e+15 4.3e+29 293 C2 C3 PHTX DST Java Movie
    2018/08/03 01:36:10 285 53 144 135 0 -1.5*1 3.2e+12 3.4e+26 296 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/08/03 08:00:05 289 52 311 363 510 9.2*1 6.5e+12 3.2e+27 304 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/03 20:36:05 18 12 487 483 424 -2.5*1 ---- ---- 15 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/04 06:12:05 277 23 205 182 0 -7.4*1 4.8e+12 1.0e+27 277 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/04 11:36:05 127 25 152 205 492 10.1*1 3.7e+12 4.2e+26 126 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/05 10:00:05 58 10 379 559 1774 130.5*1 ---- ---- 62 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/06 11:12:05 306 20 227 189 0 -16.3*1 1.0e+13 2.6e+27 292 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/08/06 16:36:05 63 13 297 386 986 38.7*1 ---- ---- 72 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/07 06:12:05 215 9 283 270 0 -9.6*1 ---- ---- 217 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/09 08:12:05 105 11 199 212 359 3.9*1 ---- ---- 109 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/10 20:57:18 66 32 59 66 122 0.6*1 6.8e+13 1.2e+27 72 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/11 06:00:05 86 61 221 547 507 11.4*1 3.9e+14 9.4e+28 76 C2 C3 PHTX DST Java Movie Poor Event
    2018/08/11 12:00:05 275 57 163 308 529 11.7*1 3.0e+13 4.0e+27 270 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/11 20:36:05 78 35 186 182 124 -0.9*1 2.5e+13 4.2e+27 75 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/12 00:12:06 273 10 129 199 336 4.8*1 ---- ---- 268 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/12 00:48:05 7 8 448 657 1640 107.0*1 ---- ---- 7 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/12 12:00:05 80 30 112 130 196 1.2*1 4.6e+13 2.9e+27 77 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/12 12:48:05 277 28 351 422 1114 48.4*1 1.7e+13 1.1e+28 276 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/13 02:48:05 71 21 233 432 1686 139.1*1 7.3e+12 2.0e+27 79 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/14 09:12:10 274 60 174 310 736 22.4*1 5.8e+14 8.8e+28 281 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/08/14 18:36:05 115 14 273 253 0 -3.9*1 ---- ---- 119 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/15 06:48:05 78 23 183 294 606 16.0*1 9.9e+12 1.7e+27 86 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/15 07:48:05 164 13 385 462 1056 42.8*1 ---- ---- 163 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/15 22:12:05 124 17 251 329 701 19.0*1 ---- ---- 119 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/08/16 09:24:05 92 21 526 613 711 14.3*1 5.5e+13 7.6e+28 93 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/16 11:00:06 286 11 297 325 376 3.4*1 ---- ---- 281 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/17 01:36:08 290 18 192 184 126 -1.1*1 ---- ---- 280 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/17 09:24:21 185 10 457 318 0 -94.7*1 ---- ---- 186 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/17 23:04:12 306 7 213 0 0 -90.0*1 ---- ---- 306 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/18 20:57:25 56 14 171 179 341 3.7*1 ---- ---- 58 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/19 07:24:05 222 52 448 431 363 -3.6*1 1.3e+14 1.3e+29 220 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/20 00:12:05 244 18 230 279 404 5.9*1 ---- ---- 242 C2 C3 PHTX DST Java Movie Poor Event
    2018/08/20 21:24:05 252 120 126 216 363 5.4*1 2.2e+14 1.7e+28 266 C2 C3 PHTX DST Java Movie Poor Event
    2018/08/21 11:24:05 251 18 221 172 0 -6.1*1 ---- ---- 246 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/22 04:00:06 133 8 249 261 486 7.6*1 ---- ---- 129 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2
    2018/08/24 00:12:05 265 50 229 446 722 22.5*1 9.0e+13 2.4e+28 269 C2 C3 PHTX DST Java Movie Poor Event
    2018/08/24 04:17:37 87 46 56 105 290 3.6*1 3.0e+14 4.7e+27 89 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/08/24 16:12:05 274 35 221 275 406 6.1*1 1.2e+14 2.9e+28 273 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/26 08:36:05 290 14 174 154 0 -2.3*1 ---- ---- 284 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/27 04:36:05 248 14 238 225 54 -2.5*1 ---- ---- 247 C2 C3 PHTX DST Java Movie Poor Event; Only C2
    2018/08/27 07:00:05 284 23 251 286 421 6.3*1 2.6e+12 8.3e+26 287 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/28 17:00:05 92 51 360 344 322 -1.6*1 2.0e+14 1.3e+29 99 C2 C3 PHTX DST Java Movie
    2018/08/29 00:48:06 95 59 178 267 705 22.3*1 4.9e+13 7.8e+27 97 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/29 14:00:06 99 35 349 304 0 -18.1*1 5.1e+13 3.1e+28 95 C2 C3 PHTX DST Java Movie Very Poor Event
    2018/08/31 04:28:42 69 14 194 146 0 -9.5*1 ---- ---- 71 C2 C3 PHTX DST Java Movie Very 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).