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

2021/03/01 00:48:05 274 49 478 367 0 -48.3^*1 1.4e+13 1.6e+28 277 C2 C3 PHTX DST Java Movie Only C2

2021/03/01 14:24:06 263 58 320 357 404 3.4^*1 6.7e+14 3.4e+29 265 C2 C3 PHTX DST Java Movie

2021/03/02 07:48:05 71 148 148 218 273 2.8^*1 2.9e+14^*2 3.2e+28^*2 92 C2 C3 PHTX DST Java Movie Poor Event; Partial Halo

2021/03/02 08:36:05 259 18 254 314 482 8.8^*1 ---- ---- 265 C2 C3 PHTX DST Java Movie Very Poor Event

2021/03/02 13:25:42 260 57 472 536 554 5.8^*1 4.2e+14 4.7e+29 258 C2 C3 PHTX DST Java Movie

2021/03/02 19:00:06 262 57 84 145 198 1.6^*1 1.0e+15 3.7e+28 265 C2 C3 PHTX DST Java Movie Very Poor Event

2021/03/03 10:48:06 277 49 116 169 210 1.6^*1 3.2e+14 2.1e+28 276 C2 C3 PHTX DST Java Movie

2021/03/03 21:36:06 247 36 295 284 248 -1.3^*1 5.3e+14 2.3e+29 247 C2 C3 PHTX DST Java Movie Poor Event

2021/03/05 17:12:05 83 49 153 140 0 -1.9^*1 2.6e+14 3.0e+28 90 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/07 07:48:05 123 8 184 195 290 2.2^*1 ---- ---- 121 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/07 11:36:05 229 15 265 350 659 16.8^*1 ---- ---- 233 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/07 16:24:05 226 18 233 203 0 -6.0^*1 ---- ---- 233 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/07 21:12:11 83 70 122 240 267 3.0^*1 1.3e+15 9.9e+28 76 C2 C3 PHTX DST Java Movie

2021/03/08 00:36:05 243 10 180 250 763 24.0^*1 ---- ---- 246 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/08 04:36:05 235 8 377 251 0 -84.4^*1 ---- ---- 242 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/08 16:00:05 177 12 445 558 1142 50.2^*1 ---- ---- 183 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/09 10:00:05 69 23 101 152 485 9.8^*1 6.3e+13 3.2e+27 75 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/09 23:48:05 120 10 347 298 0 -28.7^*1 ---- ---- 112 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/12 14:36:05 91 64 209 455 1074 47.8^*1 7.4e+13 1.6e+28 100 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/15 00:12:05 70 11 148 86 0 -15.5^*1 ---- ---- 74 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/16 08:24:06 175 226 231 366 339 4.2^*1 4.7e+15^*2 1.3e+30^*2 226 C2 C3 PHTX DST Java Movie Partial Halo

2021/03/18 00:12:05 69 54 100 220 305 4.0^*1 1.4e+14 6.9e+27 65 C2 C3 PHTX DST Java Movie Poor Event

2021/03/18 03:24:05 124 23 292 296 307 0.5^*1 1.3e+14 5.7e+28 120 C2 C3 PHTX DST Java Movie Poor Event

2021/03/19 14:12:05 81 39 91 118 242 2.3^*1 3.7e+14 1.5e+28 87 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/20 01:25:45 51 172 337 502 469 7.5^*1 2.3e+15^*2 1.3e+30^*2 96 C2 C3 PHTX DST Java Movie Partial Halo

2021/03/20 06:36:05 248 16 373 287 0 -33.5^*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Poor Event

2021/03/20 08:48:06 59 56 157 280 609 15.1^*1 1.5e+14 1.9e+28 67 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/20 10:12:05 107 43 375 355 308 -2.6^*1 1.7e+12 1.2e+27 116 C2 C3 PHTX DST Java Movie

2021/03/21 06:24:05 86 23 212 218 257 1.0^*1 9.5e+13 2.1e+28 88 C2 C3 PHTX DST Java Movie Poor Event

2021/03/22 00:24:06 99 76 296 332 366 2.6^*1 5.0e+14 2.2e+29 108 C2 C3 PHTX DST Java Movie Poor Event

2021/03/22 02:12:06 294 83 189 152 0 -4.9^*1 9.8e+14 1.8e+29 304 C2 C3 PHTX DST Java Movie Only C2

2021/03/23 00:12:05 108 33 127 156 322 3.9^*1 1.7e+14 1.4e+28 105 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/23 15:48:05 277 69 157 390 383 6.1 2.3e+15 2.9e+29 284 C2 C3 PHTX DST Java Movie

2021/03/25 04:12:05 121 40 267 311 390 4.2^*1 3.6e+13 1.3e+28 123 C2 C3 PHTX DST Java Movie Poor Event

2021/03/25 20:24:06 277 10 158 199 321 3.9^*1 ---- ---- 274 C2 C3 PHTX DST Java Movie Very Poor Event

2021/03/26 04:39:01 98 79 110 190 228 2.0^*1 1.2e+15 7.2e+28 97 C2 C3 PHTX DST Java Movie

2021/03/26 12:12:06 174 211 154 218 286 3.1^*1 1.3e+15^*2 1.6e+29^*2 214 C2 C3 PHTX DST Java Movie Poor Event; Partial Halo

2021/03/26 23:24:05 276 23 129 94 0 -9.7^*1 2.3e+13 1.9e+27 277 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/27 03:36:05 208 10 462 549 1431 81.0^*1 ---- ---- 209 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/27 10:36:05 93 80 93 53 0 -14.5^*1 1.0e+14 4.5e+27 106 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/27 16:00:05 88 78 47 53 110 0.5^*1 5.1e+14 5.6e+27 90 C2 C3 PHTX DST Java Movie Poor Event

2021/03/29 15:48:05 259 49 209 228 370 4.2^*1 1.1e+14 2.3e+28 266 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2021/03/30 05:00:06 112 9 139 100 0 -11.6^*1 ---- ---- 109 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/30 18:00:06 29 67 148 173 372 5.3^*1 6.5e+12 7.1e+26 29 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2021/03/31 03:24:05 274 62 190 399 618 15.8^*1 8.9e+14 1.6e+29 271 C2 C3 PHTX DST Java Movie Poor Event

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
2021/03/01	00:48:05	274	49	478	367	0	-48.3^*1	1.4e+13	1.6e+28	277	C2 C3 PHTX DST Java Movie	Only C2
2021/03/01	14:24:06	263	58	320	357	404	3.4^*1	6.7e+14	3.4e+29	265	C2 C3 PHTX DST Java Movie
2021/03/02	07:48:05	71	148	148	218	273	2.8^*1	2.9e+14^*2	3.2e+28^*2	92	C2 C3 PHTX DST Java Movie	Poor Event; Partial Halo
2021/03/02	08:36:05	259	18	254	314	482	8.8^*1	----	----	265	C2 C3 PHTX DST Java Movie	Very Poor Event
2021/03/02	13:25:42	260	57	472	536	554	5.8^*1	4.2e+14	4.7e+29	258	C2 C3 PHTX DST Java Movie
2021/03/02	19:00:06	262	57	84	145	198	1.6^*1	1.0e+15	3.7e+28	265	C2 C3 PHTX DST Java Movie	Very Poor Event
2021/03/03	10:48:06	277	49	116	169	210	1.6^*1	3.2e+14	2.1e+28	276	C2 C3 PHTX DST Java Movie
2021/03/03	21:36:06	247	36	295	284	248	-1.3^*1	5.3e+14	2.3e+29	247	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/05	17:12:05	83	49	153	140	0	-1.9^*1	2.6e+14	3.0e+28	90	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/07	07:48:05	123	8	184	195	290	2.2^*1	----	----	121	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/07	11:36:05	229	15	265	350	659	16.8^*1	----	----	233	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/07	16:24:05	226	18	233	203	0	-6.0^*1	----	----	233	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/07	21:12:11	83	70	122	240	267	3.0^*1	1.3e+15	9.9e+28	76	C2 C3 PHTX DST Java Movie
2021/03/08	00:36:05	243	10	180	250	763	24.0^*1	----	----	246	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/08	04:36:05	235	8	377	251	0	-84.4^*1	----	----	242	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/08	16:00:05	177	12	445	558	1142	50.2^*1	----	----	183	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/09	10:00:05	69	23	101	152	485	9.8^*1	6.3e+13	3.2e+27	75	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/09	23:48:05	120	10	347	298	0	-28.7^*1	----	----	112	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/12	14:36:05	91	64	209	455	1074	47.8^*1	7.4e+13	1.6e+28	100	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/15	00:12:05	70	11	148	86	0	-15.5^*1	----	----	74	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/16	08:24:06	175	226	231	366	339	4.2^*1	4.7e+15^*2	1.3e+30^*2	226	C2 C3 PHTX DST Java Movie	Partial Halo
2021/03/18	00:12:05	69	54	100	220	305	4.0^*1	1.4e+14	6.9e+27	65	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/18	03:24:05	124	23	292	296	307	0.5^*1	1.3e+14	5.7e+28	120	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/19	14:12:05	81	39	91	118	242	2.3^*1	3.7e+14	1.5e+28	87	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/20	01:25:45	51	172	337	502	469	7.5^*1	2.3e+15^*2	1.3e+30^*2	96	C2 C3 PHTX DST Java Movie	Partial Halo
2021/03/20	06:36:05	248	16	373	287	0	-33.5^*1	----	----	252	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/20	08:48:06	59	56	157	280	609	15.1^*1	1.5e+14	1.9e+28	67	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/20	10:12:05	107	43	375	355	308	-2.6^*1	1.7e+12	1.2e+27	116	C2 C3 PHTX DST Java Movie
2021/03/21	06:24:05	86	23	212	218	257	1.0^*1	9.5e+13	2.1e+28	88	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/22	00:24:06	99	76	296	332	366	2.6^*1	5.0e+14	2.2e+29	108	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/22	02:12:06	294	83	189	152	0	-4.9^*1	9.8e+14	1.8e+29	304	C2 C3 PHTX DST Java Movie	Only C2
2021/03/23	00:12:05	108	33	127	156	322	3.9^*1	1.7e+14	1.4e+28	105	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/23	15:48:05	277	69	157	390	383	6.1	2.3e+15	2.9e+29	284	C2 C3 PHTX DST Java Movie
2021/03/25	04:12:05	121	40	267	311	390	4.2^*1	3.6e+13	1.3e+28	123	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/25	20:24:06	277	10	158	199	321	3.9^*1	----	----	274	C2 C3 PHTX DST Java Movie	Very Poor Event
2021/03/26	04:39:01	98	79	110	190	228	2.0^*1	1.2e+15	7.2e+28	97	C2 C3 PHTX DST Java Movie
2021/03/26	12:12:06	174	211	154	218	286	3.1^*1	1.3e+15^*2	1.6e+29^*2	214	C2 C3 PHTX DST Java Movie	Poor Event; Partial Halo
2021/03/26	23:24:05	276	23	129	94	0	-9.7^*1	2.3e+13	1.9e+27	277	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/27	03:36:05	208	10	462	549	1431	81.0^*1	----	----	209	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/27	10:36:05	93	80	93	53	0	-14.5^*1	1.0e+14	4.5e+27	106	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/27	16:00:05	88	78	47	53	110	0.5^*1	5.1e+14	5.6e+27	90	C2 C3 PHTX DST Java Movie	Poor Event
2021/03/29	15:48:05	259	49	209	228	370	4.2^*1	1.1e+14	2.3e+28	266	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2021/03/30	05:00:06	112	9	139	100	0	-11.6^*1	----	----	109	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/30	18:00:06	29	67	148	173	372	5.3^*1	6.5e+12	7.1e+26	29	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2021/03/31	03:24:05	274	62	190	399	618	15.8^*1	8.9e+14	1.6e+29	271	C2 C3 PHTX DST Java Movie	Poor Event

*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).