Subj: lists of "Debris" spotted in C2's and C3's .....some very stange observations..... Date: 98-10-22 08:47:45 EDT From: STwang To: Phikent Preliminary 1998 SOHO LASCO Coronal Mass Ejection List (Revised 24-June-1998 -- SPP) N.B. This is a working version of a catalogue of probable coronal mass ejections detected in white light observations of the LASCO coronagraphs. This list is maintained at the SOHO Experimenters' Operations Facility, and it is based on an examination of only quick-look data, which represents a subset of the final LASCO dataset. Questions about this list should be directed to Russ Howard at NRL (howard@cronus.nrl.navy.mil) or to Simon Plunkett of USRA/NRL (plunkett@kreutz.nascom.nasa.gov). Date(s) UT Location Comment 01-Jan-1998 06:05 E New material appears. Part of event from previous two days? 02-Jan-1998 04:37 NW Jet appears, expands toward equator. 02-Jan-1998 23:28 NW+ Full(?) halo beginning in NW. EIT 195 prominence eruptions. Extremely bright C2 prominence at 09:42. 04-Jan-1998 02:29 N+ Faint crossing loops w/remainder of polar crown filament channel in 195. 05-Jan-1998 21:28 NE Material ejected. 06-Jan-1998 ~03:30 W Very faint front; SW streamer cleared out. Concave-outward in SW trails. 06-Jan-1998 19:27 NE More material ejected. 06-Jan-1998 20:56 W Another faint front w/concave-outward trailing continues to empty corona. 08-Jan-1998 01:57 W Another small packet of material. 08-Jan-1998 08:36 E Structured loop w/concave-outward trailing moves non-radially. Nice EIT 195 data. 09-Jan-1998 04:09 W More small packets of material. 10-Jan-1998 09:05 SE Several spits of material over many hours. 10-Jan-1998 19:11 NW Structured 80 degree loop w/EIT 195 & 304 EPL behind limb. Faint extension to PA~187 degrees? 12-Jan-1998 04:00 N+ Partial halo from AR 8131/32 in SE. Fainter partial halo later in day? 12-Jan-1998 20:58 NE Several jets? at different PAs. Becomes loops w/concave-out trailing. 13-Jan-1998 01:27 NW Very structured material. 15-Jan-1998 01:40 NE Non-radial jet. 15-Jan-1998 ~06:00 NW Faint front within fainter cloud? 16-Jan-1998 01:40 NE Non-radial wave, wider than previous day. 16-Jan-1998 09:11 NW Faint narrow loop? 17-Jan-1998 04:09 NE+ Halo, followed by bright non-radial blob in SE. 17-Jan-1998 23:54 SW Non-radial wave of material. 18-Jan-1998 19:58 NE No clear front. 19-Jan-1998 03:59 SE Slowly rising loops ejected. 19-Jan-1998 07:33 W Structured loop w/concave out trailing. 20-Jan-1998 19:58 E Non-radial ejection. 20-Jan-1998 22:03 W Large loop w/concave-out trailing. 20-Jan-1998 23:29 NE Bright ray unwinds? 21-Jan-1998 06:37 S+ Halo from 195 SPC filament+. 21-Jan-1998 16:56 S+ Partial halo. EIT inconclusive. 24-Jan-1998 04:04 SE Faint material? 25-Jan-1998 09:51 W Rapidly rising structured loops. 25-Jan-1998 15:26 NE+ Partial halo, brightest and structured in East, but expands to encompass S & SW. Faint sweeping feature in SE earlier? 25-Jan-1998 22:19 E Fast, bright front. 26-Jan-1998 04:11 N Odd sweeping material. 26-Jan-1998 08:41 N Two polar jets, also caught in 195. 26-Jan-1998 15:27 NE Loop system slowly ejected. 26-Jan-1998 23:27 W Fast loops w/trailing concave-out. 27-Jan-1998 21:50 E Structured material appears to be the non-halo CME associated with a nice EIT wave from AR8144. 28-Jan-1998 03:56 SW Small ejection, falls apart. 28-Jan-1998 partial data gap -- LASCO calibration set 28-Jan-1998 14:56 W Classic 3-part CME w/concave-out. Material in SW next day? 29-Jan-1998 16:57 NW "Jellyfish" shape (courtesy K.Dere). 30-Jan-1998 14:31 W+ Bright, non-radial wave of material. Extremely faint partial halo follows structured wave over N pole? 31-Jan-1998 00:22 NW/SE Jets appear and sweep toward equator? 31-Jan-1998 12:41 NE Structured loop w/concave-out trailing. 01-Feb-1998 21:37 NE Thin loop w/trailing 02-Feb-1998 10:07 NW Bubble in streamer. 02-Feb-1998 15:27 E Material emerging, continues into next day. 03-Feb-1998 08:36 NW Bright front, becomes slanted structured loop. 03-Feb-1998 21:57 SE Faint, wide loop. 04-Feb-1998 17:02 W Very bright structured loop with impressive concave-out trailing. 06-Feb-1998 02:55 W Faint, structured material, brightest in NW. 06-Feb-1998 07:55 NE Two bright jets. 06-Feb-1998 14:55 W Bright front fades, becomes loops. 07-Feb-1998 07:28 SW Material. Front falls apart. 07-Feb-1998 14:55 NE Loop, falls apart. 07-Feb-1998 18:27 SW Elongated loop? 07-Feb-1998 21:34 E Faint fan? Followed by non-radial jet. 08-Feb-1998 00:55 W Spike of material. 08-Feb-1998 09:27 NE Very bright jet/fan. 08-Feb-1998 20:23 E+ Material in E. Something faint in NE? Non-radial jet early next day. 09-Feb-1998 07:28 NE YA non-radial jet, brighter than previous. 09-Feb-1998 23:27 E+ Rising loops, becomes partial halo. E limb event is back-side from EIT. ~06:00 on 10-Feb is N front-side event. 11-Feb-1998 03:27 W Irregular front. Extends to NW? 11-Feb-1998 15:55 NW Faint 3-part elongated loop. 12-Feb-1998 14:27 W Loop? 14-Feb-1998 ~05:00 E+ Rising loops (began previous day) erupt with partial halo and large concave-out trailing feature. 14-Feb-1998 10:27 NW Separate event or part of halo? Large bright bubble ejected late. Bubble has trailing concave-outward. 15-Feb-1998 17:27 SE Linear feature curves/deflects significantly. Late material follows. 16-Feb-1998 00:27 NE The mother-of-all polar jets? Submode-4 (No EIT CME watch). 17-Feb-1998 05:08 SE Thin loop w/structure. Faster material adjacent near equator? 18-Feb-1998 02:27 E Bright material at E and NE later. EIT prominence eruption. 18-Feb-1998 09:27 W Amorphous ejection falls apart, but material continues flowing. 19-Feb-1998 19:28 NW Jet. 19-Feb-1998 16:27 SE Several small jets. Second one brighter. 20-Feb-1998 09:27 SE Loop? with EIT EPLs. 20-Feb-1998 13:38 NW Small series of Loops 20-Feb-1998 23:55 E Slow loop system, lattice work in trailing 21-Feb-1998 00:55 SW Structured loop(s) w/concave-out trailing. 21-Feb-1998 04:26 SE Bright slanted front, expands to NE. 21-Feb-1998 17:38 NE Loop in N leg of previous CME 21-Feb-1998 22:27 E Fast, amorphous ejection in southern leg of previous CME 22-Feb-1998 06:27 E Bright fuzzy loop, lots of blobs follow 22-Feb-1998 17:27 E Bright loop, second phase 17:55, displaced slightly to N 22-Feb-1998 20:23 E New loop system, slow 22-Feb-1998 22:30 NW Fast, slanted, followed by another 23:55 23-Feb-1998 01:55 SW Major Loop system 23-Feb-1998 13:28 SE Bright loop system 23-Feb-1998 23:27 E Large Double Loop system in progress 24-Feb-1998 07:55 E Loop, helical structures trailing 24-Feb-1998 17:55 SW Small loop, disipates quickly, minor in C3 There have been very faint loop expansions. 24-Feb-1998 17:55 NE Jet in C2 and 1 image of C3 24-Feb-1998 21:55 NW Small tongue along preexisting streamer, then becomes narrow, filled (?) loop 25-Feb-1998 18:55 SW Large (45 degree) region of disturbed flow. Possible CME 25-Feb-1998 20:55 NE Small loop 25-Feb-1998 22:27 E Large, bright, helical loops in southern leg of earlier small loop 26-Feb-1998 05:27 W/SW Two sections, the Northern one is narrow and fast. The southern one is broad and slow. Very complex. 26-Feb-1998 19:03 NW In Progress. Diffuse loop. 27-Feb-1998 09:55 W Large Loop 27-Feb-1998 12:55 S Small, faint loop at high latitude 28-Feb-1998 13:51 SW+ Partial halo. 01-Mar-1998 10:03 W Cloud w/concave-out trailing. 01-Mar-1998 22:44 NE Concave-out structure ejected after several hours of expanding streamer. 03-Mar-1998 <14:30 N Faint partial halo after several hour data gap. 03-Mar-1998 ~18:00 Data Gap -- LASCO doors closed for ESR. 06-Mar-1998 ~01:00 C2/C3 observations resume following data gap 06-Mar-1998 <01:18 NE CME in progress as observations resume. 06-Mar-1998 <01:18 SW CME in progress as observations resume. Apparently associated with EIT EPL. 06-Mar-1998 07:11 W 3-part encompasses earlier event. 07-Mar-1998 02:12 W Another 3-part; appears in NW first. 07-Mar-1998 08:02 SE Material. Could have started earlier. 08-Mar-1998 02:39 NNW Faint fan? Other PA's also?? 08-Mar-1998 18:55 E Loop(?) w/fan in NE. 10-Mar-1998 05:34 E Cloud w/trailing V. 10-Mar-1998 12:55 NW Small bright fan in NW, fainter material near equator? Second fan early next day. 12-Mar-1998 01:31 NE Very faint material? 13-Mar-1998 01:31 SW Faint loop(?) or cloud(?). 13-Mar-1998 12:33 NW More faint material. 13-Mar-1998 21:30 W Structured loop(s) w/core. Concave-out feature trails. 14-Mar-1998 23:08 NE Event at side of streamer. 15-Mar-1998 19:31 SE+ Multi-part event. Partial halo. EIT AR-related. 16-Mar-1998 03:06 W Separate(?) concentric loops. 17-Mar-1998 12:34 W+ Bright material leads structured loops. 17-Mar-1998 22:28 NW Jet of bright material. 18-Mar-1998 07:33 E+ Large event. Recoverable data gap. Nice 195 EPL. 18-Mar-1998 11:35 W New bright material appears, but joins with E limb event in SW. 19-Mar-1998 09:41 NE Amorphous ejections w/waves? 19-Mar-1998 18:30 NE First of two faint loops(?) diminish extent of streamer. 21-Mar-1998 03:40 SW Complex, multi-day event as AR rotates over limb. 21-Mar-1998 11:07 NW Slow rising concentric loops. 22-Mar-1998 07:41 SE Several bright fronts. 23-Mar-1998 00:50 NE Bright concentric structured loops. 23-Mar-1998 04:36 W Several bright structured fronts amid this multi-day event. 23-Mar-1998 17:50? E Material, later wide concentric loops. 24-Mar-1998 11:40 SW Very bright loop(s). 25-Mar-1998 02:07 E Faint material, then brighter front. 25-Mar-1998 12:36 SW Large bright loop. 26-Mar-1998 00:40 E More bright material. 27-Mar-1998 <02:59 E Large structured loop w/concave-out. 27-Mar-1998 22:22 SW Bright concentric loops. 28-Mar-1998 13:06 NW+ Narrow bright loop extends across N. 29-Mar-1998 03:48 SW+ Extremely bright, becomes halo. Continues for many hours. 30-Mar-1998 13:28 E+ Several connected(?) fronts. 31-Mar-1998 03:28 NW+NE Narrow material. 31-Mar-1998 04:59 Halo Mother-of-all-halos. Fast. Continues for hours? (Separate events?) 31-Mar-1998 22:30 NE+ Structured event w/304 EPL. Halo? 01-Apr-1998 05:46 S New event in S? (or earlier continues?) 01-Apr-1998 13:10 SE Very bright wave through C2. 02-Apr-1998 06:43 SW Material, moves non-radially. 03-Apr-1998 04:23 SW Bright structured material. 04-Apr-1998 02:46 NNE Faint loop. 04-Apr-1998 16:15 SE Bright loop(?). 04-Apr-1998 18:13 SW Bright structured material. 05-Apr-1998 06:24 SW At least two more ejections. 06-Apr-1998 02:00 SW Two more ejections; concave-out trails. 07-Apr-1998 19:59 E Bright tongue of material. 08-Apr-1998 03:59 N+ NE and NW ejections, followed by dark(?) loop above N pole. 09-Apr-1998 06:44 NNE Slow rising structured cusp. 09-Apr-1998 09:44 SW Structured material. 10-Apr-1998 01:55 E Deformed loop w/trailing V. 11-Apr-1998 all day SE Rising loops. Sporadic bright material this day and previous. 12-Apr-1998 12:55 NE Bright loop, may expand in South. 12-Apr-1998 23:27 W Very faint cloud/mound. 13-Apr-1998 04:26 NE Bright material; shape similar to previous day ejection. 14-Apr-1998 05:26 NE Bright fast loop. 14-Apr-1998 ~12:00 S+ Sweeping feature; rising arcade SW. 15-Apr-1998 08:27 NNW Bright structured material. 195 AR. 15-Apr-1998 13:55 NNW+ Second ejection from AR. 15-Apr-1998 17:55 NNW+ Third ejection. 16-Apr-1998 01:55 NNW Fourth ejection. 16-Apr-1998 all day SW+ Very large, slow rising arcade. Sporadic discrete ejections. Finally erupts at 19:55. 17-Apr-1998 15:00 DATA GAP All LASCO doors closed prior to orbital station-keeping thruster firings. 18-Apr-1998 22:00 All LASCO doors re-opened. 19-Apr-1998 early NW Bright material followed by unusual dark linear structure. 19-Apr-1998 15:40 NW More bright material as jet. 19-Apr-1998 08:05 E Wide structured cloud. 20-Apr-1998 10:07 W+ Extremely bright CME w/195 prom. Proton snowstorm follows. 21-Apr-1998 01:40 E Another front. Difficult to say much about structure due to protons. 21-Apr-1998 01:40 NW Another fan/jet. 21-Apr-1998 20:06 W Structured material in the snow. 21-Apr-1998 20:46 E Structured material in the snow. 23-Apr-1998 05:27 E+ Bright structured CME. Partial halo. NW fan too? 25-Apr-1998 15:11 E Ragged loop, followed at 18:38 by ejecta at NE leg. 27-Apr-1998 01:00 NW Faint fan. 27-Apr-1998 09:26 E+ Large structured loop becomes halo. 29-Apr-1998 01:29 NE Multiple ejections along streamer. 29-Apr-1998 16:58 E+ Extremely bright and structured halo. Bright "worms" in NE. 30-Apr-1998 21:23 W Amorphous material. 01-May-1998 08:27 NE Faint material. 01-May-1998 >20:00 SW Mound? 02-May-1998 <01:30 NE Large loop. 02-May-1998 05:31 SW+ Faint halo. 02-May-1998 14:06 Halo Bright halo followed by snowstorm. 02-May-1998 21:20 SW Faint structured material. 03-May-1998 10:29 SW Structured loop. 03-May-1998 16:20 -- Many structures "deflected". 03-May-1998 18:59 SE Small ejection. NE too? 03-May-1998 22:02 NW Bright structured loop. 04-May-1998 06:27 SE Loop. falls apart. 04-May-1998 23:27 SW Small ejection? 06-May-1998 00:02 SW Bright structured loop. 06-May-1998 02:28 NE Concentric structured arcade. 06-May-1998 08:29 W+ Bright loop w/snowstorm. Second ejection in SW. 07-May-1998 00:28 NW Concentric loops w/core. 07-May-1998 10:05 E Slinky arcade. 08-May-1998 02:28 W Bright pointy loop. 08-May-1998 06:27 SW Structured, non-radial event. 08-May-1998 all day E Amorphous flow. 08-May-1998 13:01 SW Bright structured arcade. 08-May-1998 23:10 E Arcade. 09-May-1998 02:10 SW Filled structured mound. 09-May-1998 03:35 W+ Partial halo, bright and structured. 09-May-1998 15:43 SW Ragged fan. 09-May-1998 20:04 W Bright structured event followed by slow concave-out feature. 10-May-1998 08:29 W Non-radial front. 10-May-1998 10:30 SW Small ejection. 10-May-1998 14:07 SW Larger bright filled mound. 11-May-1998 05:38 NW Bright fan? Falls apart. 11-May-1998 14:27 SW+ Partial halo? Two CMEs? 11-May-1998 21:55 Halo Brightest in West. 12-May-1998 03:55 NE Very bright structured arcade. 12-May-1998 >06:55 SW Missed event during Q/L data gap? 12-May-1998 15:55 NW Amorphous brightening (NE too?). 12-May-1998 23:55 NW+ Faint halo, brightest in NW. 13-May-1998 04:26 N Firehose shape. 13-May-1998 05:27 SW Wedge-shape ejection. 13-May-1998 15:27 W Narrow fan, falls apart. 13-May-1998 19:50 NNW Faint loop. 14-May-1998 03:55 W+ Halo, brightest in West. 14-May-1998 17:55 NW Jagged fan? 16-May-1998 02:27 SW Thick bright loop, followed by slow dark rising loops in NW. 17-May-1998 14:27 NW Fan or jet. 19-May-1998 01:27 SE Thick loop followed by extreme structure. 19-May-1998 <14:00 W Large CME during Q/L data gap. 19-May-1998 16:36 SW Bright tongue. 20-May-1998 11:04 SW Several episodes of brightening. Unusual dark "lane" ejected, before thick bright front after 20:00. 21-May-1998 05:27 NW Bright structured loop. 21-May-1998 17:27 E Faint cloud w/structure. 22-May-1998 08:08 NW Jet, w/deflected material? 22-May-1998 11:10 E Structured loop. 23-May-1998 00:28 SW Slow arcade w/concave-out. 24-May-1998 01:30 NE Jet/fan appears, w/faint material to the South. Second jet at 09:01. 26-May-1998 ~09:37 NE Slow blob? 26-May-1998 20:04 NW Small loop? Streamer brightens. 26-May-1998 23:28 NNE Faint deflected streamer? Loop? 27-May-1998 07:04 W+ Thick loop, arcade, becomes partial halo. 27-May-1998 09:07 SE Slow arcade. 27-May-1998 23:56 NE Bright ejecta. 28-May-1998 05:33 W YA bright loop w/structure. 28-May-1998 22:31 E Small jet. 29-May-1998 11:27 NE+ Faint loop, extends over N pole? 29-May-1998 18:58 SE Thick non-radial loop? 29-May-1998 22:30 W+ Amorphous ejection, followed by 3-part in SW, w/faint loop over N pole. 30-May-1998 16:44 E Bright loop w/structured core, nice U. 30-May-1998 23:28 W Thick material. 31-May-1998 04:26 SE+ Fast thin loops, U in NE. 01-Jun-1998 11:27 W Amorphous material ejected at PA 270. Speed ~300 km/s. 02-Jun-1998 02:59 SE Bright loop with possible U-shape. 02-Jun-1998 <13:31 SW Large, bright, structured prominence. 02-Jun-1998 21:06 NE Jagged front, with circular or U-shaped structure following. Prominence eruption in EIT 195. 03-Jun-1998 <13:28 E Large loop, w/ complex trailing structure. Extends over 100 deg. in PA. 04-Jun-1998 <02:28 W+ Large loop w/ bright prominence. Partial halo (150 deg.), speed ~1400 km/s. Probably back-side event. 04-Jun-1998 09:36 NE Material ejected. Ragged front. 04-Jun-1998 21:00 SW Loop-like eruption. EIT shows event behind limb. 04-Jun-1998 21:27 SE Loops w/ bright core. Event behind limb in EIT. 04-Jun-1998 22:28 NE Ragged front. Narrow ejection. 05-Jun-1998 01:30 SW Loop ejection. EIT activity along SPC. 05-Jun-1998 07:02 SW+ Arcade of loops in same location as previous event. Filament eruption and post-event arcade in EIT. Partial halo. 05-Jun-1998 10:28 SW Another loop-like ejection. Behind limb in EIT. 05-Jun-1998 <14:04 SW+ Loop/arcade ejections on both SE and SW. Event in SW sweeps across S pole. Also fainter component to N. Probably a back side event (or events). 06-Jun-1998 14:00 NE Slow loop eruption. Bright radial structures on either side in C3 - deflected structures? 07-Jun-1998 09:32 NE+ Eruption in NE becomes a halo in C3. Brightest part in NE. EIT indicates likely to be back side. 08-Jun-1998 10:27 SE Amorphous material ejected. 08-Jun-1998 16:27 S+ Partial halo, >200 deg PA. EIT wave event, C-class flare. 09-Jun-1998 06:27 SW Multiple loops. 09-Jun-1998 08:55 SW+ Arcade of loops. Second phase of previous event? Becomes partial halo. Activity along SPC in EIT. 09-Jun-1998 14:21 NW Arcade of loops w/ bright core. V-shaped feature trailing in C3. 09-Jun-1998 21:06 SW Loop eruption (faint). Continuation of earlier events? 10-Jun-1998 03:55 SE Amorphous ejection. Ragged front. 10-Jun-1998 <16:06 NW Ragged front in C2. U-shaped feature in C3. 10-Jun-1998 22:06 SW Narrow jet/spike. 11-Jun-1998 00:05 NE Structured loop moves non-radially. 11-Jun-1998 10:28 E Large loop deforms as it propagates outward. Bright knots trailing. Associated with M-class flare. 12-Jun-1998 20:06 NW Narrow eruption along NW streamer. Preceded by brightening of this streamer and adjacent one over several hours. 12-Jun-1998 22:06 SE Fast, ragged front appears along streamer. 13-Jun-1998 01:55 SW Arcade of loops - involves structures all along W limb. Streamer deflection in NW. EIT activity in SW/W, maybe extending behind limb. 13-Jun-1998 02:27 SE Another fast, ragged front. 13-Jun-1998 05:26 E YA ragged front! Associated with M-flare. 13-Jun-1998 ~16:06 S Fan expands slowly, followed by expanding loop. Continuation of earlier event in SW? 14-Jun-1998 08:55 W Narrow, elongated loop. Arcade of loops to SW at 09:27. 15-Jun-1998 03:27 SW Another slow, arcade eruption. 15-Jun-1998 04:26 E Narrow eruption, ragged front. 15-Jun-1998 06:55 W Structured loop w/ extended bright core. Deflection of streamer in NW. 15-Jun-1998 16:15 S Loop or arcade eruption. EP in EIT 195. Deflection of SE streamer. 15-Jun-1998 17:27 SE Loop(s) w/ embedded core. 16-Jun-1998 05:27 SW+ Arcade of loops extends all along W limb and partly over S pole. 16-Jun-1998 18:27 SW Large loop deforms as it moves outward. Partial halo (back-sided). Flare-associated. 16-Jun-1998 21:22 SW Loops w/ bright core ejected along streamer. 17-Jun-1998 04:24 E Material ejected. Faint in C3. 17-Jun-1998 06:55 NW Narrow loop-like ejection. 18-Jun-1998 01:27 SW Bright, thick loop(s). One leg very much brighter than the other. 19-Jun-1998 07:40 SE Loop-like ejection. 19-Jun-1998 <13:20 SSW Faint, narrow ejection. Continuation of previous days event(s) from this location? 19-Jun-1998 19:21 N Slow event. 20-Jun-1998 07:57 NW Ragged front w/ possible deflection of structures to N. 20-Jun-1998 15:37 NW Loop w/ bright core. 20-Jun-1998 18:20 Halo Bright (filamentary ?) material in NE. Fainter components at all PA. C flare. 21-Jun-1998 05:35 W Arcade of loops extends all along W limb. 21-Jun-1998 22:15 NW Arcade of loops w/ bright embedded knot of emission. Bright legs on either side and ahead of LE in C2. Distorted front in C3. 22-Jun-1998 07:34 SW YA arcade of nested loops. 22-Jun-1998 <11:26 NE U-shape in C2. Loop appearance in C3? 23-Jun-1998 03:59 SW Loop w/ ragged front. Cavity and bright core. 23-Jun-1998 08:27 NW Amorphous material ejected in same direction as 06/21 22:15. 23-Jun-1998 20:23 NE Bright front w/ circular or U-shape feature trailing. 24-Jun-1998 08:27 N Faint ejection starts over N pole and bends towards NE.