SOHO/LASCO CME Catalog

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

1996/12/02 02:39:05 285 10 431 --- --- --- ---- ---- 280 C2 C3 195 SXT PHTX DST Java Movie Only 2 points

1996/12/02 15:35:05 Halo (OA) 360 538 430 478 -8.8 1.6e+15^*2 2.3e+30^*2 253 C2 C3 195 SXT PHTX DST Java Movie

1996/12/02 21:45:56 95 38 293 324 423 4.7^*1 1.2e+14^*2 4.9e+28^*2 95 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1996/12/05 14:02:05 100 60 104 125 338 4.9^*1 3.3e+14^*2 1.8e+28^*2 99 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

1996/12/05 21:48:06 102 48 141 248 560 14.9^*1 ---- ---- 104 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C3

1996/12/06 14:50:05 275 51 367 307 322 -3.6 8.2e+15 5.5e+30 274 C2 C3 195 SXT PHTX DST Java Movie

1996/12/07 02:30:07 83 44 197 237 262 1.8^*1 ---- ---- 90 C2 C3 195 SXT PHTX DST Java Movie

1996/12/07 09:30:05 260 9 286 173 0 -17.0^*1 ---- ---- 269 C2 C3 195 SXT PHTX DST Java Movie

1996/12/08 10:30:05 107 19 282 183 0 -12.6^*1 ---- ---- 99 C2 C3 195 SXT PHTX DST Java Movie

1996/12/08 18:30:08 87 64 422 419 416 -0.4^*1 6.6e+14^*2 5.8e+29^*2 81 C2 C3 195 SXT PHTX DST Java Movie Only C3

1996/12/09 06:30:09 273 54 158 107 0 -7.9^*1 5.4e+13^*2 6.8e+27^*2 279 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points

1996/12/09 20:11:10 272 52 37 42 83 0.3^*1 ---- ---- 280 C2 C3 195 SXT PHTX DST Java Movie Not LE; Only C2

1996/12/10 14:30:07 87 125 211 210 208 -0.1^*1 1.7e+14^*2 3.7e+28^*2 86 C2 C3 195 SXT PHTX DST Java Movie Partial Halo

1996/12/12 14:30:05 94 46 206 266 362 5.5^*1 4.9e+13^*2 1.0e+28^*2 81 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points

1996/12/14 07:15:17 67 12 95 99 117 0.3 ---- ---- 70 C2 C3 195 SXT PHTX DST Java Movie Only C3

1996/12/15 09:30:06 69 37 224 284 372 4.8^*1 ---- ---- 72 C2 C3 195 SXT PHTX DST Java Movie

1996/12/16 03:30:06 77 47 236 343 411 7.0^*1 1.0e+14 2.9e+28 73 C2 C3 195 SXT PHTX DST Java Movie

1996/12/16 18:35:11 85 33 208 228 264 1.6^*1 1.3e+14^*2 2.9e+28^*2 82 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1996/12/17 22:30:05 130 42 168 --- --- --- 1.2e+13^*2 1.7e+27^*2 126 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 2 points; Only C2

1996/12/18 11:30:05 255 16 237 304 445 7.8^*1 ---- ---- 256 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1996/12/19 01:30:08 8 4 ---- --- --- --- ---- ---- 7 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/03/20; Poor Event; Only 1 point; Only C2

1996/12/19 16:30:07 269 130 469 --- --- --- 5.1e+14^*2 5.6e+29^*2 265 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C2; Partial Halo

1996/12/19 18:30:05 269 >180 142 187 196 1.2^*1 ---- ---- 244 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2006/03/20; Uncertain Width; Partial Halo

1996/12/20 19:30:06 257 32 291 211 0 -10.6^*1 9.2e+13^*2 3.9e+28^*2 266 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1996/12/21 21:30:07 272 72 347 580 524 11.4 4.2e+15 2.5e+30 254 C2 C3 195 SXT PHTX DST Java Movie

1996/12/22 19:33:41 256 47 257 357 582 13.7^*1 5.5e+12 1.8e+27 264 C2 C3 195 SXT PHTX DST Java Movie

1996/12/23 13:38:13 284 68 263 508 453 12.8 1.7e+15 5.7e+29 286 C2 C3 195 SXT PHTX DST Java Movie all days, difficult to distinguish; Only C3

1996/12/23 21:16:41 255 58 354 405 445 4.6 1.3e+15 8.0e+29 253 C2 C3 195 SXT PHTX DST Java Movie UVCS

1996/12/24 13:28:58 265 69 325 315 292 -1.1 1.7e+15 8.8e+29 266 C2 C3 195 SXT PHTX DST Java Movie

1996/12/26 10:51:54 271 49 262 304 353 3.1 9.9e+14 3.4e+29 266 C2 C3 195 SXT PHTX DST Java Movie

1996/12/27 07:04:02 269 35 211 218 391 4.6^*1 ---- ---- 267 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C2

1996/12/27 08:44:02 270 63 269 384 437 6.8 2.0e+15 7.3e+29 275 C2 C3 195 SXT PHTX DST Java Movie

1996/12/31 22:30:06 270 5 146 167 338 4.1^*1 ---- ---- 274 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

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
1996/12/02	02:39:05	285	10	431	---	---	---	----	----	280	C2 C3 195 SXT PHTX DST Java Movie	Only 2 points
1996/12/02	15:35:05	Halo (OA)	360	538	430	478	-8.8	1.6e+15^*2	2.3e+30^*2	253	C2 C3 195 SXT PHTX DST Java Movie
1996/12/02	21:45:56	95	38	293	324	423	4.7^*1	1.2e+14^*2	4.9e+28^*2	95	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1996/12/05	14:02:05	100	60	104	125	338	4.9^*1	3.3e+14^*2	1.8e+28^*2	99	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
1996/12/05	21:48:06	102	48	141	248	560	14.9^*1	----	----	104	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 3 points; Only C3
1996/12/06	14:50:05	275	51	367	307	322	-3.6	8.2e+15	5.5e+30	274	C2 C3 195 SXT PHTX DST Java Movie
1996/12/07	02:30:07	83	44	197	237	262	1.8^*1	----	----	90	C2 C3 195 SXT PHTX DST Java Movie
1996/12/07	09:30:05	260	9	286	173	0	-17.0^*1	----	----	269	C2 C3 195 SXT PHTX DST Java Movie
1996/12/08	10:30:05	107	19	282	183	0	-12.6^*1	----	----	99	C2 C3 195 SXT PHTX DST Java Movie
1996/12/08	18:30:08	87	64	422	419	416	-0.4^*1	6.6e+14^*2	5.8e+29^*2	81	C2 C3 195 SXT PHTX DST Java Movie	Only C3
1996/12/09	06:30:09	273	54	158	107	0	-7.9^*1	5.4e+13^*2	6.8e+27^*2	279	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 3 points
1996/12/09	20:11:10	272	52	37	42	83	0.3^*1	----	----	280	C2 C3 195 SXT PHTX DST Java Movie	Not LE; Only C2
1996/12/10	14:30:07	87	125	211	210	208	-0.1^*1	1.7e+14^*2	3.7e+28^*2	86	C2 C3 195 SXT PHTX DST Java Movie	Partial Halo
1996/12/12	14:30:05	94	46	206	266	362	5.5^*1	4.9e+13^*2	1.0e+28^*2	81	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 3 points
1996/12/14	07:15:17	67	12	95	99	117	0.3	----	----	70	C2 C3 195 SXT PHTX DST Java Movie	Only C3
1996/12/15	09:30:06	69	37	224	284	372	4.8^*1	----	----	72	C2 C3 195 SXT PHTX DST Java Movie
1996/12/16	03:30:06	77	47	236	343	411	7.0^*1	1.0e+14	2.9e+28	73	C2 C3 195 SXT PHTX DST Java Movie
1996/12/16	18:35:11	85	33	208	228	264	1.6^*1	1.3e+14^*2	2.9e+28^*2	82	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1996/12/17	22:30:05	130	42	168	---	---	---	1.2e+13^*2	1.7e+27^*2	126	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 2 points; Only C2
1996/12/18	11:30:05	255	16	237	304	445	7.8^*1	----	----	256	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1996/12/19	01:30:08	8	4	----	---	---	---	----	----	7	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2006/03/20; Poor Event; Only 1 point; Only C2
1996/12/19	16:30:07	269	130	469	---	---	---	5.1e+14^*2	5.6e+29^*2	265	C2 C3 195 SXT PHTX DST Java Movie	Only 2 points; Only C2; Partial Halo
1996/12/19	18:30:05	269	>180	142	187	196	1.2^*1	----	----	244	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2006/03/20; Uncertain Width; Partial Halo
1996/12/20	19:30:06	257	32	291	211	0	-10.6^*1	9.2e+13^*2	3.9e+28^*2	266	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1996/12/21	21:30:07	272	72	347	580	524	11.4	4.2e+15	2.5e+30	254	C2 C3 195 SXT PHTX DST Java Movie
1996/12/22	19:33:41	256	47	257	357	582	13.7^*1	5.5e+12	1.8e+27	264	C2 C3 195 SXT PHTX DST Java Movie
1996/12/23	13:38:13	284	68	263	508	453	12.8	1.7e+15	5.7e+29	286	C2 C3 195 SXT PHTX DST Java Movie	all days, difficult to distinguish; Only C3
1996/12/23	21:16:41	255	58	354	405	445	4.6	1.3e+15	8.0e+29	253	C2 C3 195 SXT PHTX DST Java Movie UVCS
1996/12/24	13:28:58	265	69	325	315	292	-1.1	1.7e+15	8.8e+29	266	C2 C3 195 SXT PHTX DST Java Movie
1996/12/26	10:51:54	271	49	262	304	353	3.1	9.9e+14	3.4e+29	266	C2 C3 195 SXT PHTX DST Java Movie
1996/12/27	07:04:02	269	35	211	218	391	4.6^*1	----	----	267	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points; Only C2
1996/12/27	08:44:02	270	63	269	384	437	6.8	2.0e+15	7.3e+29	275	C2 C3 195 SXT PHTX DST Java Movie
1996/12/31	22:30:06	270	5	146	167	338	4.1^*1	----	----	274	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points

*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).