Compiled by C. St.Cyr (cst@sdac.nascom.nasa.gov) -- Version 1999/02/12 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 1998/03/01 10:03 272 46 514 2 6.0 LE (Front) Yes Structured arcade w/thick front; could be something faint early in day 1998/03/01 10:03 74 34 316 2 2.4 (Vertex) Yes Streamer swells and double concave-out features ejected 1998/03/01 20:13 266 59 206 1 --- LE (Cloud) No Cloud, maybe structured 1998/03/01 Data Gap after 22:50 1998/03/02 Data Gap before 01:43 1998/03/02 17:29 234 12 --- --- --- --- No Faint fan or jet 1998/03/03 Data Gap 08:38-14:30 1998/03/03 14:30 IP ~0 ~120 342 1 --- (Loop) No Missed front in data gap; structured cloud? 1998/03/03 Data Gap after 18:25 1998/03/04 Data Gap 1998/03/05 Data Gap 1998/03/06 Data Gap before 01:18 1998/03/06 01:18 ~58 ~9 --- --- --- --- No Fan or jet? 1998/03/06 01:18 255 50 --- --- --- --- Maybe Streamer swelling; non-radial material ejected late 1998/03/06 07:11 269 78 487 1 --- LE (Front) Yes Bright front in NW; very bright "question-mark" feature internal 1998/03/07 03:46 267 69 546 2 12.2 LE (Loop) Maybe Structured loop/arcade 1998/03/07 07:12 ~102 ~25 348 1 --- (Blob) Yes Non-radial structured tongue? 1998/03/07 23:19 107 16 208 1 --- LE (Tongue No Non-radial tongue (part of previous?) 1998/03/08 02:39 319 25 394 1 --- LE (Cloud) No Faint smooth cloud 1998/03/08 18:55 ~109 ~63 204 1 --- LE (Materi No Material, falls apart in C2 (VLA & MLSO event) 1998/03/08 21:55 60 17 670 1 --- LE (Tongue No Non-radial tongue 1998/03/09 17:07 100 40 202 1 --- LE (Materi No Faint front; falls apart in C2 1998/03/10 04:36 82 63 404 2 12.5 LE (Cloud) Yes Faint cloud precedes arcade 1998/03/10 12:55 292 18 427 1 --- LE (Tongue No Non-radial(?) tongue w/trailing structure 1998/03/11 03:59 ~290 ~23 421 1 --- LE (Arc) No Excruciatingly faint arc(?) 1998/03/12 07:32 ~55 ~9 --- --- --- --- No Very faint jet? Part of larger faint event? 1998/03/12 Data Gap 18:30-23:06 1998/03/13 01:31 256 46 313 1 --- LE (Cloud) No Faint cloud falls apart in C2 1998/03/13 12:33 273 46 191 1 --- LE (Materi No Amorphous non-radial material, falls apart 1998/03/13 21:30 266 83 468 1 --- LE (Loop) Yes Thick loop w/arcade 1998/03/14 ~10:10 ~123 ~65 --- --- --- --- No Extremely faint front 1998/03/15 01:31 75 27 275 1 --- LE (Materi No Faint material outlines streamer 1998/03/15 14:11 47 6 --- --- --- --- No Narrow faint fan or jet 1998/03/15 16:06 309 24 --- --- --- --- No Material along streamer? 1998/03/15 19:31 151 97 321 1 --- LE (Loop) Maybe Arcade, expands under S pole; overlapped by East limb event 1998/03/16 01:31 99 73 443 2 44.9 LE (Loop) Maybe Thick bright structured arcade flattens in C2; overlaps SE 1998/03/16 03:30 260 54 200 1 --- LE (Front) Yes Arcade, diffuse front (example of confusing proms in C2) 1998/03/17 02:07 49 5 --- --- --- --- No Jet (simply a large polar jet?) 1998/03/17 12:34 189 202 259 1 --- LE (Loop) Maybe Loop/arcade in SW w/extensions under S pole into East 1998/03/17 22:28 268 12 332 1 --- (Arc?) No Fan or arc? 1998/03/18 07:33 ~150 ~180 822 2 17.2 LE (Loop) Yes Bright thick structured loop in E/SE; faint extensions to SW 1998/03/18 11:35 263 61 239 1 --- LE (Front) Maybe Small loop/front falls apart in C2; part of previous? 1998/03/19 03:06 72 36 86 1 --- (Cloud) No Several discrete spits and at least one amorphous cloud 1998/03/19 23:30 72 30 341 1 --- LE (Cloud) No Part of previous event? New cloud 1998/03/20 ~07:35 ~26 ~26 88 1 --- (Cavity?) No Narrow faint fan w/embedded arc? 1998/03/20 20:03? ~355 ~40 --- --- --- --- No Extremely faint cloud? Part of next event? 1998/03/21 00:34? ~330 ~60 121 1 --- (Cavity) Yes Faint diffuse cloud precedes concentric arcade; part of previous? 1998/03/21 ~06:00 ~248 ~55 40 1 --- (Inner loo Yes Existing streamer brightens,expands, erupts 1998/03/21 17:39 91 15 --- --- --- --- No Non-radial fan/jet 1998/03/22 07:41 108 40 297 1 --- LE (Front) No Bright loop/front; falls apart in C2; second part later? 1998/03/23 00:50 74 42 368 1 --- LE (Front) Maybe Irregular front w/trailing structure 1998/03/23 03:09 ~269 ~89 220 1 --- LE (Front) No Extremely faint irregular front 1998/03/23 09:33 269 89 588 2 8.0 LE (Loop) Yes Bright structured arcade (part of previous?) 1998/03/23 16:06 100 32 413 1 --- LE (Cusp) No Cuspy faint material 1998/03/23 20:48 81 47 143 1 --- LE (Front) No Irregular faint front 1998/03/24 11:40 237 54 303 1 --- LE (Materi No Thick bright material (loop?); dissolves in C3; second part after data gap? 1998/03/24 Data Gap 17:30-21:07 1998/03/25 05:36 90 73 297 1 --- (Knot) Yes Faint shell precedes brighter knot; second knot later 1998/03/25 13:14 229 71 762 1 --- LE (Loop) Yes Thick bright loop; much structure; deforms in C3 1998/03/26 00:40 90 59 256 1 --- LE (Materi No Irregular structured material; bright non-radial material later 1998/03/27 01:23 91 75 567 1 --- LE (Loop) Yes Non-radial irregular bright structured loop 1998/03/27 10:23 114 37 387 1 --- LE (Arc) No Faint partial arc(?); later material at southern edge 1998/03/27 20:07 204 93 529 1 --- (Loop) Yes Faint cuspy mound(?) precedes bright thick structured concentric arcade 1998/03/28 13:06 279 36 133 1 --- LE (Materi No Cuspy streamer blowout? Maybe some structure 1998/03/28 22:41 ~348 ~165 255 1 --- LE (Loop) No Faint partial halo; no structure 1998/03/29 03:48 Halo 360 1,499 1 --- LE (Halo) Yes Extremely bright and structured in SE-W; faint halo elsewhere 1998/03/30 ~13:28 ~99 ~42 --- --- --- --- No Irregular material 1998/03/30 18:47 ~138 ~95 613 1 --- LE (Loop) Maybe Structured loop w/trailing core; side sweeps up to E limb equator 1998/03/31 06:12 Halo 360 2,080 1 --- LE (Loop) Maybe Incredible structure; only two measurements C3(!) 1998/03/31 11:04 279 48 797 1 --- LE (Front) Maybe Structured material 1998/03/31 13:16 98 22 --- --- --- --- No Ugly irregular fan(?) 1998/03/31 15:54 160 68 745 1 --- (Material) Maybe Faint irregular loop(?) w/bright structured core 1998/03/31 21:23 43 67 647 2 9.6 LE (Loop) Yes Structured arcade w/core(?)