• 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
    1997/08/01 02:40:05 97 53 183 192 318 3.1*1 4.1e+13*2 6.8e+27*2 92 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C2
    1997/08/01 04:20:06 100 42 221 194 141 -1.8*1 1.6e+14 3.9e+28 95 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/02 16:55:05 81 39 218 144 0 -10.5 8.3e+13 2.0e+28 85 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/03 06:45:06 223 17 575 598 754 11.1*1 ---- ---- 229 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only 3 points; Only C2
    1997/08/03 07:30:05 91 27 203 117 0 -22.0*1 3.5e+12 7.3e+26 93 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only C2
    1997/08/05 07:57:15 205 7 428 572 1746 124.3*1 ---- ---- 209 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only 3 points; Only C2
    1997/08/05 12:20:15 342 4 722 --- --- --- ---- ---- 338 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 2 points; Only C2
    1997/08/05 13:47:45 89 31 162 128 0 -9.1*1 1.7e+14 2.2e+28 95 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3
    1997/08/05 21:37:50 344 4 1029 --- --- --- ---- ---- 342 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 2 points; Only C2
    1997/08/06 18:00:51 99 49 195 211 295 2.4*1 6.7e+12 1.3e+27 98 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1997/08/06 21:00:05 248 48 268 186 0 -50.3*1 2.4e+13*2 8.6e+27*2 245 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C2
    1997/08/07 06:07:05 269 43 228 257 278 1.8*1 4.7e+14 1.2e+29 265 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1997/08/07 14:24:04 28 111 142 138 124 -0.2 6.1e+14 6.2e+28 40 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/08 07:53:13 96 69 297 319 365 2.5 5.2e+14 2.3e+29 92 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/08/08 17:23:11 83 72 268 256 232 -1.1 1.3e+15 4.8e+29 82 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/09 02:40:09 281 38 137 141 155 0.3*1 8.1e+13 7.6e+27 274 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/09 16:25:51 281 32 285 367 418 6.0 1.2e+14 4.8e+28 277 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/09 18:10:05 116 32 170 249 573 13.6*1 3.0e+13 4.4e+27 103 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only C2
    1997/08/09 22:43:50 90 85 195 226 259 1.7 9.0e+14 1.7e+29 87 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/10 02:40:06 269 80 208 304 333 4.7*1 1.5e+15 3.2e+29 276 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/10 05:28:10 276 23 288 369 594 13.0*1 1.6e+13 6.7e+27 278 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/02/22; Poor Event
    1997/08/11 23:35:05 82 28 219 180 0 -4.3*1 7.7e+13 1.8e+28 83 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/12 11:33:05 104 74 218 290 317 3.3 1.3e+15 3.1e+29 105 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/13 08:26:05 273 46 201 242 294 2.9 2.0e+15 4.0e+29 271 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/08/14 11:48:21 84 43 175 191 258 1.9*1 7.9e+13 1.2e+28 85 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/14 16:23:05 86 48 300 220 0 -11.0*1 1.4e+14 6.5e+28 96 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/16 22:21:56 263 57 67 61 0 -1.5*1 1.4e+14 3.1e+27 261 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2
    1997/08/18 21:00:35 352 10 239 215 0 -10.1*1 ---- ---- 350 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only 3 points; Only C2
    1997/08/19 14:03:48 261 20 273 245 179 -2.9*1 3.7e+12 1.4e+27 262 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/19 17:32:23 90 49 207 176 0 -3.7*1 5.7e+13 1.2e+28 106 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1997/08/20 00:11:05 261 20 137 145 161 0.4*1 3.7e+13 3.5e+27 260 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/20 08:03:05 88 68 107 110 176 1.0*1 5.4e+13*2 3.1e+27*2 79 C2 C3 195 SXT PHTX DST Java Movie Poor Event
    1997/08/20 15:58:05 12 9 475 682 1518 93.1*1 ---- ---- 13 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only C2
    1997/08/20 20:33:14 74 76 129 296 269 3.2*1 1.6e+15 1.3e+29 77 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.
    1997/08/21 12:52:05 260 31 229 322 510 10.3*1 8.1e+13 2.1e+28 263 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/22 06:45:07 94 103 378 503 448 5.6 4.2e+15 3.0e+30 94 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/22 07:30:05 272 47 125 114 86 -0.5*1 1.8e+13 1.4e+27 266 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/22 18:52:05 90 69 300 434 470 8.1*1 1.6e+13 7.0e+27 90 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/23 01:30:05 204 7 152 101 0 -15.2*1 ---- ---- 210 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event; Only 3 points; Only C2
    1997/08/23 07:34:28 303 52 171 240 430 8.0*1 6.8e+13*2 9.9e+27*2 294 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/23 23:15:53 269 57 276 130 0 -9.4*1 3.8e+14 1.4e+29 272 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event
    1997/08/25 18:08:24 78 71 263 304 421 5.6*1 3.4e+14 1.2e+29 81 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/26 03:00:05 281 53 126 193 782 28.6*1 1.2e+13*2 9.4e+26*2 280 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2
    1997/08/26 11:47:37 277 39 187 245 276 2.7*1 1.1e+15 2.0e+29 270 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1997/08/26 16:38:27 71 71 91 214 223 2.3*1 1.3e+15 5.3e+28 79 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event
    1997/08/26 17:29:18 273 57 233 141 0 -36.3*1 1.9e+14*2 5.1e+28*2 279 C2 C3 195 SXT PHTX DST Java Movie UVCS
    1997/08/28 16:41:17 99 77 238 177 0 -5.0 2.8e+15 8.0e+29 105 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/29 05:29:20 254 47 301 347 442 6.3*1 5.9e+14 2.7e+29 255 C2 C3 195 SXT PHTX DST Java Movie
    1997/08/30 01:30:35 Halo (OA) 360 371 460 551 9.3 1.7e+15*2 1.2e+30*2 67 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).