• 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
    1997/02/01 01:37:24 95 59 218 254 351 4.1*1 4.5e+14 1.1e+29 96 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/02/02 05:50:05 102 47 221 154 0 -8.3 2.6e+14 6.4e+28 108 C2 C3 195 SXT PHTX DST Java Movie
    1997/02/02 10:30:05 279 36 168 171 178 0.2*1 ---- ---- 273 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/02/03 18:18:37 274 67 345 526 456 9.3 2.8e+15 1.7e+30 272 C2 C3 195 SXT PHTX DST Java Movie Only C3
    1997/02/04 18:10:05 93 59 340 449 628 15.0 2.7e+14 1.6e+29 97 C2 C3 195 SXT PHTX DST Java Movie
    1997/02/05 03:30:05 228 58 108 101 0 -0.7*1 3.9e+13 2.3e+27 234 C2 C3 195 SXT PHTX DST Java Movie Only C2
    1997/02/07 00:30:05 Halo (OA) 360 490 718 635 14.3 4.1e+15*2 4.9e+30*2 266 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/02/08 09:30:05 258 10 206 351 621 18.0*1 ---- ---- 262 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/02/08 18:30:05 325 2 379 502 699 18.2*1 ---- ---- 320 C2 C3 195 SXT PHTX DST Java Movie
    1997/02/08 18:30:05 289 8 158 53 0 -26.7*1 ---- ---- 281 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points
    1997/02/08 21:30:06 259 18 177 225 325 3.9*1 ---- ---- 261 C2 C3 195 SXT PHTX DST Java Movie
    1997/02/08 23:30:05 325 2 ---- --- --- --- ---- ---- 322 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure
    1997/02/09 13:15:16 255 7 185 258 394 7.0*1 ---- ---- 261 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3
    1997/02/12 07:30:05 297 39 208 288 353 4.5 ---- ---- 292 C2 C3 195 SXT PHTX DST Java Movie
    1997/02/19 23:32:26 275 55 263 346 363 4.1*1 ---- ---- 275 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/11/06; Poor Event
    1997/02/20 02:30:05 303 43 132 139 190 0.9*1 9.7e+13 8.4e+27 305 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1997/02/22 23:30:05 234 134 290 208 224 -3.8 1.2e+15*2 5.0e+29*2 271 C2 C3 195 SXT PHTX DST Java Movie Partial Halo
    1997/02/23 02:30:05 208 209 905 876 877 -4.3 3.6e+15*2 1.5e+31*2 63 C2 C3 195 SXT PHTX DST Java Movie The CME width was changed from 134 to 209 degree on 2012/01/31; Partial Halo
    1997/02/24 11:30:05 267 66 123 141 171 0.9*1 1.3e+14 1.0e+28 263 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/02/25 10:30:07 103 29 128 75 0 -5.1*1 5.7e+13 4.7e+27 106 C2 C3 195 SXT PHTX DST Java Movie
    1997/02/26 05:51:55 275 25 170 215 349 5.1*1 ---- ---- 283 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/02/26 10:30:06 48 28 118 144 219 1.8*1 1.4e+13 9.7e+26 50 C2 C3 195 SXT PHTX DST Java Movie

    *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).