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

1998/10/15 10:04:36 Halo (BA) 360 262 322 321 3.2^*1 6.6e+15^*2 2.3e+30^*2 264 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3

1998/10/22 01:42:14 184 113 164 156 105 -0.8^*1 5.2e+14 7.0e+28 209 C2 C3 195 SXT PHTX DST Java Movie

1998/10/22 03:09:47 60 40 384 510 512 8.4 1.2e+15 8.6e+29 57 C2 C3 195 SXT PHTX DST Java Movie

1998/10/22 15:35:03 335 9 475 566 1109 46.2^*1 ---- ---- 333 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2

1998/10/22 22:18:37 276 48 446 413 397 -2.9 1.1e+15 1.1e+30 272 C2 C3 195 SXT PHTX DST Java Movie

1998/10/23 04:54:05 298 69 640 574 506 -10.3 2.3e+15 4.7e+30 295 C2 C3 195 SXT PHTX DST Java Movie

1998/10/23 11:18:05 99 18 201 212 239 0.9^*1 ---- ---- 107 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event

1998/10/23 11:54:06 291 17 459 444 425 -1.8^*1 ---- ---- 293 C2 C3 195 SXT PHTX DST Java Movie

1998/10/23 17:18:12 57 >173 193 207 229 0.9^*1 4.4e+14^*2 8.2e+28^*2 354 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Uncertain Width; Partial Halo

1998/10/24 02:18:05 272 96 429 360 0 -12.7^*1 2.6e+15^*2 2.4e+30^*2 278 C2 C3 195 SXT PHTX DST Java Movie

1998/10/24 03:18:11 Halo (BA) 360 332 268 210 -4.8 7.8e+15^*2 4.3e+30^*2 109 C2 C3 195 SXT PHTX DST Java Movie

1998/10/24 09:18:05 76 114 153 342 336 4.8^*1 2.2e+15 2.6e+29 69 C2 C3 195 SXT PHTX DST Java Movie

1998/10/25 04:54:05 264 25 187 201 212 0.6^*1 2.7e+13 4.8e+27 264 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event

1998/10/25 12:54:06 Halo (OA) 360 839 795 802 -6.7 7.2e+15^*2 2.5e+31^*2 74 C2 C3 195 SXT PHTX DST Java Movie

1998/10/26 01:54:05 138 32 354 338 322 -1.4 5.4e+14 3.4e+29 144 C2 C3 195 SXT PHTX DST Java Movie

1998/10/26 03:54:05 95 8 372 394 644 12.5^*1 ---- ---- 96 C2 C3 195 SXT PHTX DST Java Movie Only 3 points; Only C2

1998/10/26 05:54:05 290 5 405 382 217 -5.8^*1 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie

1998/10/26 05:54:05 247 30 379 521 692 17.6^*1 1.7e+14 1.2e+29 251 C2 C3 195 SXT PHTX DST Java Movie

1998/10/26 07:54:05 254 23 145 153 252 1.9^*1 9.5e+13 1.0e+28 255 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event; Only C2

1998/10/26 08:54:07 293 13 259 169 0 -17.8^*1 ---- ---- 296 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event

1998/10/26 14:54:07 302 10 327 321 291 -1.1^*1 ---- ---- 295 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event

1998/10/26 16:18:06 90 158 544 512 478 -4.3 1.8e+15^*2 2.6e+30^*2 143 C2 C3 195 SXT PHTX DST Java Movie Partial Halo

1998/10/26 17:18:05 288 17 799 784 774 -2.6 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie

1998/10/26 21:37:30 287 7 475 751 883 30.4 ---- ---- 282 C2 C3 195 SXT PHTX DST Java Movie

1998/10/27 01:26:00 293 5 426 377 0 -13.2^*1 ---- ---- 288 C2 C3 195 SXT PHTX DST Java Movie

1998/10/27 11:18:06 288 15 342 77 0 -122.5^*1 ---- ---- 288 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

1998/10/27 11:18:06 281 35 614 501 508 -11.6 1.0e+15 1.9e+30 283 C2 C3 195 SXT PHTX DST Java Movie

1998/10/28 02:54:05 121 58 268 283 312 1.4 1.7e+15 6.2e+29 107 C2 C3 195 SXT PHTX DST Java Movie

1998/10/28 04:54:05 40 59 208 246 330 3.3^*1 7.2e+14 1.5e+29 45 C2 C3 195 SXT PHTX DST Java Movie

1998/10/28 07:54:05 120 66 486 451 374 -5.6 1.1e+15 1.3e+30 94 C2 C3 195 SXT PHTX DST Java Movie

1998/10/28 13:25:56 299 15 244 263 270 1.0^*1 ---- ---- 292 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event

1998/10/29 00:54:05 62 91 364 392 397 1.8 3.4e+15 2.2e+30 60 C2 C3 195 SXT PHTX DST Java Movie

1998/10/29 06:18:05 308 18 452 777 1884 148.4^*1 ---- ---- 302 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Very Poor Event

1998/10/29 08:54:06 294 9 610 672 1261 55.0^*1 ---- ---- 285 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

1998/10/29 12:18:05 118 56 577 630 622 4.8 9.3e+14 1.5e+30 110 C2 C3 195 SXT PHTX DST Java Movie

1998/10/29 16:54:06 248 41 369 339 226 -4.5^*1 1.0e+14 7.1e+28 259 C2 C3 195 SXT PHTX DST Java Movie

1998/10/30 04:54:05 291 9 401 253 0 -54.3^*1 ---- ---- 284 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

1998/10/30 16:18:05 264 60 213 200 0 -2.2^*1 7.6e+13 1.7e+28 280 C2 C3 195 SXT PHTX DST Java Movie

1998/10/30 17:54:05 17 23 345 552 542 11.6 1.3e+14 7.5e+28 16 C2 C3 195 SXT PHTX DST Java Movie

1998/10/30 23:31:30 300 16 392 265 0 -18.3^*1 ---- ---- 296 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2024/05/01.; Poor Event

1998/10/31 01:54:05 243 37 227 309 421 6.4 1.0e+15 2.6e+29 247 C2 C3 195 SXT PHTX DST Java Movie

1998/10/31 02:18:08 126 48 79 --- --- --- 1.6e+14^*2 4.9e+27^*2 121 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C2

1998/10/31 16:54:05 143 24 354 431 607 12.1 1.2e+14 7.3e+28 137 C2 C3 195 SXT PHTX DST Java Movie

1998/10/31 22:50:54 83 59 283 434 1109 51.4^*1 2.0e+14^*2 8.1e+28^*2 82 C2 C3 195 SXT PHTX DST Java Movie

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
1998/10/15	10:04:36	Halo (BA)	360	262	322	321	3.2^*1	6.6e+15^*2	2.3e+30^*2	264	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only C3
1998/10/22	01:42:14	184	113	164	156	105	-0.8^*1	5.2e+14	7.0e+28	209	C2 C3 195 SXT PHTX DST Java Movie
1998/10/22	03:09:47	60	40	384	510	512	8.4	1.2e+15	8.6e+29	57	C2 C3 195 SXT PHTX DST Java Movie
1998/10/22	15:35:03	335	9	475	566	1109	46.2^*1	----	----	333	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event; Only C2
1998/10/22	22:18:37	276	48	446	413	397	-2.9	1.1e+15	1.1e+30	272	C2 C3 195 SXT PHTX DST Java Movie
1998/10/23	04:54:05	298	69	640	574	506	-10.3	2.3e+15	4.7e+30	295	C2 C3 195 SXT PHTX DST Java Movie
1998/10/23	11:18:05	99	18	201	212	239	0.9^*1	----	----	107	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event
1998/10/23	11:54:06	291	17	459	444	425	-1.8^*1	----	----	293	C2 C3 195 SXT PHTX DST Java Movie
1998/10/23	17:18:12	57	>173	193	207	229	0.9^*1	4.4e+14^*2	8.2e+28^*2	354	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event; Uncertain Width; Partial Halo
1998/10/24	02:18:05	272	96	429	360	0	-12.7^*1	2.6e+15^*2	2.4e+30^*2	278	C2 C3 195 SXT PHTX DST Java Movie
1998/10/24	03:18:11	Halo (BA)	360	332	268	210	-4.8	7.8e+15^*2	4.3e+30^*2	109	C2 C3 195 SXT PHTX DST Java Movie
1998/10/24	09:18:05	76	114	153	342	336	4.8^*1	2.2e+15	2.6e+29	69	C2 C3 195 SXT PHTX DST Java Movie
1998/10/25	04:54:05	264	25	187	201	212	0.6^*1	2.7e+13	4.8e+27	264	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event
1998/10/25	12:54:06	Halo (OA)	360	839	795	802	-6.7	7.2e+15^*2	2.5e+31^*2	74	C2 C3 195 SXT PHTX DST Java Movie
1998/10/26	01:54:05	138	32	354	338	322	-1.4	5.4e+14	3.4e+29	144	C2 C3 195 SXT PHTX DST Java Movie
1998/10/26	03:54:05	95	8	372	394	644	12.5^*1	----	----	96	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points; Only C2
1998/10/26	05:54:05	290	5	405	382	217	-5.8^*1	----	----	284	C2 C3 195 SXT PHTX DST Java Movie
1998/10/26	05:54:05	247	30	379	521	692	17.6^*1	1.7e+14	1.2e+29	251	C2 C3 195 SXT PHTX DST Java Movie
1998/10/26	07:54:05	254	23	145	153	252	1.9^*1	9.5e+13	1.0e+28	255	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event; Only C2
1998/10/26	08:54:07	293	13	259	169	0	-17.8^*1	----	----	296	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Very Poor Event
1998/10/26	14:54:07	302	10	327	321	291	-1.1^*1	----	----	295	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event
1998/10/26	16:18:06	90	158	544	512	478	-4.3	1.8e+15^*2	2.6e+30^*2	143	C2 C3 195 SXT PHTX DST Java Movie	Partial Halo
1998/10/26	17:18:05	288	17	799	784	774	-2.6	----	----	284	C2 C3 195 SXT PHTX DST Java Movie
1998/10/26	21:37:30	287	7	475	751	883	30.4	----	----	282	C2 C3 195 SXT PHTX DST Java Movie
1998/10/27	01:26:00	293	5	426	377	0	-13.2^*1	----	----	288	C2 C3 195 SXT PHTX DST Java Movie
1998/10/27	11:18:06	288	15	342	77	0	-122.5^*1	----	----	288	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points
1998/10/27	11:18:06	281	35	614	501	508	-11.6	1.0e+15	1.9e+30	283	C2 C3 195 SXT PHTX DST Java Movie
1998/10/28	02:54:05	121	58	268	283	312	1.4	1.7e+15	6.2e+29	107	C2 C3 195 SXT PHTX DST Java Movie
1998/10/28	04:54:05	40	59	208	246	330	3.3^*1	7.2e+14	1.5e+29	45	C2 C3 195 SXT PHTX DST Java Movie
1998/10/28	07:54:05	120	66	486	451	374	-5.6	1.1e+15	1.3e+30	94	C2 C3 195 SXT PHTX DST Java Movie
1998/10/28	13:25:56	299	15	244	263	270	1.0^*1	----	----	292	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event
1998/10/29	00:54:05	62	91	364	392	397	1.8	3.4e+15	2.2e+30	60	C2 C3 195 SXT PHTX DST Java Movie
1998/10/29	06:18:05	308	18	452	777	1884	148.4^*1	----	----	302	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Very Poor Event
1998/10/29	08:54:06	294	9	610	672	1261	55.0^*1	----	----	285	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points
1998/10/29	12:18:05	118	56	577	630	622	4.8	9.3e+14	1.5e+30	110	C2 C3 195 SXT PHTX DST Java Movie
1998/10/29	16:54:06	248	41	369	339	226	-4.5^*1	1.0e+14	7.1e+28	259	C2 C3 195 SXT PHTX DST Java Movie
1998/10/30	04:54:05	291	9	401	253	0	-54.3^*1	----	----	284	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points
1998/10/30	16:18:05	264	60	213	200	0	-2.2^*1	7.6e+13	1.7e+28	280	C2 C3 195 SXT PHTX DST Java Movie
1998/10/30	17:54:05	17	23	345	552	542	11.6	1.3e+14	7.5e+28	16	C2 C3 195 SXT PHTX DST Java Movie
1998/10/30	23:31:30	300	16	392	265	0	-18.3^*1	----	----	296	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2024/05/01.; Poor Event
1998/10/31	01:54:05	243	37	227	309	421	6.4	1.0e+15	2.6e+29	247	C2 C3 195 SXT PHTX DST Java Movie
1998/10/31	02:18:08	126	48	79	---	---	---	1.6e+14^*2	4.9e+27^*2	121	C2 C3 195 SXT PHTX DST Java Movie	Only 2 points; Only C2
1998/10/31	16:54:05	143	24	354	431	607	12.1	1.2e+14	7.3e+28	137	C2 C3 195 SXT PHTX DST Java Movie
1998/10/31	22:50:54	83	59	283	434	1109	51.4^*1	2.0e+14^*2	8.1e+28^*2	82	C2 C3 195 SXT PHTX DST Java Movie

*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).