Compiled by C. St.Cyr (cst@sdac.nascom.nasa.gov) -- Version 1999/02/18 First C2 Central Angular Primary H-T Concave Appearance PA Width Speed Fit Accel Speed Out Date Time [UT] [deg] [deg] [km/s] [m/s^2] Feature Feature?Comments 1998/04/01 13:10 107 25 533 1 --- LE (Tongue No Bright non-radial tongue (wave shape) 1998/04/02 06:43 249 33 227 1 --- LE (Materi No Faint diffuse non-radial material 1998/04/02 18:30 152 44 333 1 --- (Blob) No Continuation of South? New diffuse front appears; looks like prom 1998/04/03 04:23 258 60 539 1 --- LE (Front) No Irregular front w/structure 1998/04/03 20:12 263 54 652 1 --- LE (Front) No Second irregular front w/structure 1998/04/04 02:46 25 62 237 1 --- LE (Front) No Faint filled front 1998/04/04 05:47 ~251 ~31 191 1 --- LE (Materi No Non-radial material; falls apart 1998/04/04 15:41 93 34 543 1 --- LE (Tongue No Non-radial tongue (or loop?) w/structure 1998/04/04 18:13 254 53 441 1 --- LE (Front) No Irregular structured front 1998/04/04 23:29 109 10 440 1 --- LE (Tongue Maybe Tongue 1998/04/05 01:05 236 36 210 1 --- (Front) No Faint material precedes brighter front 1998/04/05 15:51 246 22 --- --- --- --- No Faint irregular material 1998/04/06 02:00 253 55 373 1 --- LE (Cloud) No Faint cloud or loop 1998/04/06 05:04 246 49 912 1 --- LE (Front) Yes Bright structured front; large concave-out 1998/04/06 ~08:49 ~124 ~48 230 1 --- (Blob) No Several discrete spits or blobs 1998/04/07 10:14 91 25 426 1 --- (Blob) No Several non-radial blobs or waves 1998/04/08 03:27 75 46 564 2 9.5 LE (Materi Maybe Material ahead of non-radial arcade 1998/04/08 03:59 289 23 832 1 --- LE (Tongue No Bright non-radial tongue(?) 1998/04/08 06:37 253 34 180 1 --- LE (Front) No Faint front falls apart; second one follows 1998/04/08 06:37 8 73 247 2 3.6 (Cavity) No Diffuse material precedes cavity 1998/04/08 18:41 285 52 696 2 17.7 LE (Front) Yes Streamer swells, erupts into structured arcade 1998/04/09 06:44 16 70 311 1 --- (Material) Yes Bright twisting structured features followed by arcade 1998/04/09 09:06 229 34 296 1 --- LE (Materi No Material falls apart 1998/04/09 10:35 289 31 185 1 --- LE (Materi No Irregular non-radial front; falls apart in C2 1998/04/10 01:55 94 48 465 1 --- LE (Cloud) Yes Structured cloud; deforms in C3 1998/04/10 06:55 319 57 158 1 --- LE (Mound) No Faint irregular mound 1998/04/10 18:00 ~286 ~32 94 1 --- LE (Loop) No Thin loop(?) 1998/04/10 18:51 215 16 195 1 --- LE (Materi No Non-radial material; falls apart 1998/04/10 22:22 80 36 --- --- --- --- No Streamer brightens; is material ejected? 1998/04/11 04:26 140 66 208 1 --- (Front) No Faint fronts; first falls apart early; second may be arcade 1998/04/11 22:27 74 9 392 1 --- LE (Jet) No Jet or tongue 1998/04/12 12:55 ~124 ~153 623 1 --- LE (Cloud) Yes Bright structured cloud in NE; faint extensions under South 1998/04/12 18:55 268 55 593 1 --- (Cloud) Maybe Narrow jet followed by diffuse cloud; maybe arcade 1998/04/12 23:27 ~254 ~30 586 1 --- LE (Cloud) No Faint cloud superposed on event in progress 1998/04/13 04:26 ~96 ~145 495 1 --- LE (Cloud) No Another bright structured cloud in NE w/extension to South 1998/04/13 ~18:27 ~211 ~71 --- --- --- --- No Small ejection followed by structured cloud(?) 1998/04/14 05:26 83 81 1188 2 25.5 LE (Loop) Yes Bright thick loop w/trailing structure 1998/04/15 07:55 338 56 725 1 --- LE (Cloud) Yes Bright structured cloud w/prom pieces 1998/04/15 13:55 1 56 625 1 --- LE (Cloud) Yes Second bright structured cloud w/extensions to NE 1998/04/15 17:55 ~3 ~71 469 1 --- (Tongue) No Tongue in NNW w/twisting wave(?) & faint extension to NE 1998/04/16 01:55 ~10 ~102 519 1 --- LE (Tongue Maybe Another bright structured tongue w/faint extension to NE 1998/04/16 all day ~223 ~100 591 1 --- (Front) Yes Slowly expanding arcade erupts 1998/04/16 12:55 67 33 404 1 --- (Cavity) No Tough to see front; maybe part of cavity? 1998/04/16 16:55 277 21 408 1 --- LE (Tongue No Non-radial twisting tongue 1998/04/16 23:02 286 53 --- --- --- --- Maybe Structured material 1998/04/17 No new CMEs this day; Data ends 14:37 1998/04/18 Data begins 21:36 1998/04/18 21:36 IP 314 55 610 1 --- (Loop) No In progress as obs resume; loop w/interior structure & late fast tongue 1998/04/19 No new CMEs this day 1998/04/20 07:05 84 98 401 1 --- LE (Front) Maybe Faint structured front 1998/04/20 10:07 ~318 ~264 1638 1 --- LE (Loop) Yes Thick bright structured loop w/extensions; prom pieces; snowstorm 1998/04/21 01:40 ~89 ~75 401 1 --- LE (Cloud) No Faint cloud 1998/04/21 02:13 305 9 --- --- --- --- No Jet 1998/04/21 19:03 285 35 677 2 10.8 LE (Cloud) Yes Non-radial structured cloud; snowstorm 1998/04/21 20:46 88 44 472 1 --- LE (Cloud) Maybe Another non-radial structured cloud; snowstorm 1998/04/22 all day 221 13 --- --- --- --- No Several small ejections in SW 1998/04/23 05:27 Halo 360 1390 1 --- LE (Halo) Yes Bright thick loop in East; extensions 1998/04/23 06:55 307 14 --- --- --- --- No Bright tongue 1998/04/24 08:55 95 61 1245 1 --- (Front) Yes Faint material precedes bright structure (prom) 1998/04/25 05:35 54 19 189 1 --- LE (Loop) No Narrow pointy loop(?) 1998/04/25 15:11 89 59 335 1 --- LE (Cloud) Maybe Bright structured cloud w/late blob at North side 1998/04/26 No new CMEs this day 1998/04/27 00:00 96 14 446 1 --- LE (Arc) No Very faint non-radial arc(?) 1998/04/27 00:27 274 21 301 1 --- LE (Blob) No Small blob falls apart in C2 1998/04/27 03:01 114 30 846 1 --- (Front) No Fuzzy cloud; EIT EPL 1998/04/27 08:56 Halo 360 1631 2 45.2 LE (Halo) Yes Much structure; brightest in East; EIT wave 1998/04/27 all day 60 30 --- --- --- --- No Quasi-continuous spits for several days 1998/04/28 No new CMEs this day 1998/04/29 16:58 Halo 360 1016 1 --- LE (Halo) Yes Flat mound in NE; doily; EIT; UVCS 1998/04/30 Data Gap 17:27-20:25 1998/04/30 20:25(?) 274 37 --- --- --- --- No New material; falls apart in C2