Compiled by C. St.Cyr (cst@sdac.nascom.nasa.gov) -- Version 1999/02/23 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 1998/01/01 15:19 ~276 ~16 --- --- --- --- No Tongue moves non-radially; Narrow feature in NNW deflects 1998/01/02 04:37 ~290 ~16 543 1 --- LE (Tongue No YA non-radial tongue 1998/01/02 14:30 259 29 276 1 --- LE (Tongue No Small linear disturbance travels non-radially along streamer; Falls apart 1998/01/02 23:28 Halo 360 446 1 --- LE (Loop) Yes Brightest in West 1998/01/03 09:42 302 60 978 1 --- LE (Prom) Yes Part of halo? Extremely structured prom. Likely larger in NE. 1998/01/04 02:57 ~340 ~85 96 2 1.6 LE (Mound) No Faint filled mound; maybe some structure; could be wider. 1998/01/04 ~20:57 ~67 ~23 151 1 --- (Loop?) No Small loop or arc? 1998/01/05 No new CMEs this day; Data Gap 16:11-19:48 1998/01/06 ~02:29 ~273 ~55 180 2 3.4 (V-vertex) Yes Faint amorphous cloud; several V-shapes follow 1998/01/07 No new CMEs this day 1998/01/08 08:36 78 81 597 1 --- LE (Loop) Yes Structured loop; moves very non-radially 1998/01/09 No new CMEs this day 1998/01/10 ~20:20 283 77 738 2 14.8 LE (Loop) Yes Structured loop; deforms with altitude 1998/01/11 No new CMEs this day 1998/01/12 ~04:00 ~15 ~180 168 1 --- LE (Front) No Filled front(s); w/EIT wave from AR8131/32 1998/01/12 20:58 ~69 ~97 281 2 3.3 (Vertex) Yes Swelling streamer becomes structured arcade with large concave-out trailing 1998/01/13 01:27 270 56 265 1 --- LE (Loop) Maybe Structured arcade moves non-radially 1998/01/14 No new CMEs this day 1998/01/15 02:10 81 10 --- --- --- --- No Non-radial faint tongue; could be wider 1998/01/15 Data Gap 09:57-12:58 1998/01/16 01:40 75 12 249 1 --- LE (Tongue No Non-radial tongue; brighter than previous; noticeable "wave"; YA at 18:28 1998/01/16 09:11? 291? 33? 357 1 --- (Blob) Maybe Difficult to describe; late embedded blob/knot 1998/01/17 04:09 Halo 360 553 2 12.0 LE (Halo) No Faint halo; brightest in SE; later blobs 1998/01/17 12:00 108 37 254 1 --- LE (Loop) No Bright material falls apart in C2 1998/01/17 23:54 269 62 670 1 --- LE (Front) No Extremely non-radial front (partial loop?) 1998/01/18 11:03 ~287 ~37 422 1 --- LE (Front) No Ugly. Faint ragged material (detected in J-map) 1998/01/18 19:58 94 53 --- --- --- --- No Another extremely non-radial bright front; but falls apart in C2 1998/01/19 ~06:06 104 59 199 2 3.1 (Core) Yes Bright structured arcade from slowly swelling streamer 1998/01/19 07:33 287 55 358 1 --- LE (Loop) Yes Bright structured arcade 1998/01/19 21:25 259 33 570 1 --- LE (Loop) No Faint elongated loop(?) moves non-radially 1998/01/20 10:11 43 23 195 2 3.0 LE (Cloud) No Very faint diffuse cloud 1998/01/20 19:58 91 55 305 1 --- LE (Front) No Bright irregular front w/non-radial motion; falls apart in C2 1998/01/20 22:03 267 103 253 1 --- LE (Loop) Yes Thin loop w/trailing structure 1998/01/21 00:55 38 17 --- --- --- --- No Serated streamer? Herringbone shape unfolds/erupts 1998/01/21 06:37 Halo 360 374 1 --- LE (Loop) No Faint halo; mostly in South; some concentric loops 1998/01/21 17:27 ~195 ~168 237 1 --- LE (Loop) No Faint partial arc(?) 1998/01/22 No new CMEs this day; Data Gap 10:50-17:50 1998/01/23 01:27 ~271 ~67 --- --- --- --- No Extremely faint; not great coverage; second part?; detected in J-map 1998/01/24 04:04 ~90 ~45 283 1 --- LE (Cloud) No Very faint cloud 1998/01/24 16:43 290 20 238 1 --- LE (Loop?) No Small loop(?); falls apart in C2 1998/01/25 07:48 257 31 294 2 3.2 (Cavity) Yes Swelling streamer begins non-radial motion; 3-part w/arcade 1998/01/25 15:26 Halo 360 562 1 --- LE (Loop) Yes Brightest in East; fainter under S pole; fainter yet above N and NW 1998/01/25 22:19 84 67 773 2 23.5 LE (Materi Maybe Structured material spans brightest part of partial halo; same event? 1998/01/26 04:11 5 39 508 1 --- LE (Loop?) No Faint filled partial loop? or mound 1998/01/26 15:27 87 52 495 1 --- LE (Tongue Yes Bright tongue precedes arcade 1998/01/26 23:27 257 54 446 1 --- LE (Loop) Yes Front, falls apart in C3; second front next day? 1998/01/27 20:24 103 35 142 1 --- (Material) Yes Non-radial structured material 1998/01/28 03:27 257 23 291 1 --- LE (Blob) No Small bright non-radial blob 1998/01/28 Data Gap 07:27-14:27 1998/01/28 14:56 271 62 408 2 3.8 LE (Loop) Yes Structured arcade (aka 3-part) 1998/01/29 15:57 284 24 717 1 --- (Front) No Small jet(s) followed by structured non-radial front 1998/01/30 14:31 272 21 559 1 --- LE (Cloud) No Structured non-radial cloud; "Wave" appearance 1998/01/30 13:35? ~359 ~93 88 1 --- LE (Cloud) No Extremely faint filled cloud; not visible in C3; dubious 1998/01/31 01:09 323 16 --- --- --- --- No New "streamer" appears and sweeps equatorward; part of faint N event? 1998/01/31 12:41 73 68 521 2 7.7 LE (Loop) Yes Bright structured arcade