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

2018/03/01 20:48:05 283 37 202 204 214 0.3^*1 7.8e+12 1.6e+27 278 C2 C3 PHTX DST Java Movie Poor Event

2018/03/01 21:28:03 124 25 77 90 278 3.1^*1 3.1e+13 9.1e+26 119 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/02 01:25:40 271 55 359 360 369 0.4^*1 7.9e+14 5.1e+29 280 C2 C3 PHTX DST Java Movie

2018/03/03 04:48:07 267 34 285 211 0 -20.2^*1 8.3e+12 3.4e+27 277 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/03 07:24:05 273 31 242 364 441 8.0^*1 1.0e+13 3.0e+27 269 C2 C3 PHTX DST Java Movie Very Poor Event

2018/03/03 22:12:05 271 42 132 102 0 -4.6^*1 5.3e+13 4.6e+27 282 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/05 01:25:43 112 16 129 209 551 13.1^*1 ---- ---- 108 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/05 07:24:05 268 35 222 305 639 16.0^*1 1.9e+14 4.8e+28 268 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/05 16:36:05 287 6 220 274 647 16.1^*1 ---- ---- 280 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/06 01:25:41 234 136 127 157 284 3.0^*1 2.0e+14^*2 1.6e+28^*2 250 C2 C3 PHTX DST Java Movie Very Poor Event; Partial Halo

2018/03/07 22:36:05 266 20 144 184 580 13.6^*1 1.3e+12 1.4e+26 260 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/09 13:25:43 286 11 229 251 654 16.3^*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/10 02:12:06 99 43 204 155 0 -5.6^*1 8.9e+13 1.9e+28 86 C2 C3 PHTX DST Java Movie Very Poor Event

2018/03/11 08:12:05 256 18 103 43 0 -14.1^*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/11 16:12:05 240 8 374 545 1496 91.8^*1 ---- ---- 245 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/11 23:48:36 102 26 186 128 0 -8.9^*1 8.0e+13 1.4e+28 99 C2 C3 PHTX DST Java Movie Poor Event

2018/03/12 04:24:07 211 10 359 418 1028 40.1^*1 ---- ---- 214 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/12 12:48:05 108 68 172 274 318 4.0^*1 4.7e+14 6.9e+28 93 C2 C3 PHTX DST Java Movie Poor Event

2018/03/15 04:36:05 297 16 234 277 353 3.9^*1 ---- ---- 293 C2 C3 PHTX DST Java Movie Poor Event

2018/03/17 16:12:05 83 23 190 136 0 -29.2^*1 6.2e+12 1.1e+27 82 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/18 08:48:05 29 8 199 505 2540 270.9^*1 ---- ---- 29 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/03/19 09:12:09 263 28 162 182 353 4.7^*1 4.1e+11 5.4e+25 261 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/19 18:24:05 297 11 302 347 698 17.3^*1 ---- ---- 294 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/20 00:00:06 30 10 173 81 0 -32.0^*1 ---- ---- 38 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/20 09:12:11 32 9 277 354 941 35.4^*1 ---- ---- 36 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/20 15:12:10 26 7 330 159 0 -142.7^*1 ---- ---- 32 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/22 00:48:05 40 12 282 707 2332 222.2^*1 ---- ---- 42 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/22 14:36:05 91 32 243 250 383 3.8^*1 7.7e+12 2.3e+27 91 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/24 11:12:05 266 103 667 650 653 -1.5 1.8e+15 4.1e+30 271 C2 C3 PHTX DST Java Movie

2018/03/25 00:48:05 286 16 226 392 1086 48.6^*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/03/25 12:48:05 103 15 231 180 0 -18.0^*1 ---- ---- 102 C2 C3 PHTX DST Java Movie Very Poor Event

2018/03/25 13:48:05 281 23 230 282 420 6.2^*1 2.5e+13 6.6e+27 277 C2 C3 PHTX DST Java Movie Very Poor Event

2018/03/25 17:24:06 263 63 291 155 0 -15.1^*1 3.3e+14 1.4e+29 262 C2 C3 PHTX DST Java Movie Poor Event

2018/03/26 10:36:05 100 48 136 124 0 -1.9^*1 3.4e+14 3.2e+28 103 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/27 01:25:42 265 80 297 244 0 -6.3^*1 2.7e+14 1.2e+29 267 C2 C3 PHTX DST Java Movie

2018/03/27 05:00:05 111 73 202 204 212 0.2^*1 7.9e+14 1.6e+29 108 C2 C3 PHTX DST Java Movie Poor Event

2018/03/28 12:00:05 103 59 194 216 315 2.9^*1 4.0e+14 7.6e+28 107 C2 C3 PHTX DST Java Movie Poor Event

2018/03/29 11:24:05 74 78 134 302 342 5.1^*1 1.7e+15 1.5e+29 80 C2 C3 PHTX DST Java Movie Poor Event

2018/03/29 20:12:05 276 36 209 155 0 -13.7^*1 1.7e+14 3.7e+28 273 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/30 05:00:05 91 59 217 128 0 -17.3^*1 6.7e+13 1.6e+28 105 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/30 08:48:22 94 59 274 308 502 8.2^*1 3.9e+14 1.5e+29 99 C2 C3 PHTX DST Java Movie Poor Event

2018/03/30 18:48:05 93 65 262 303 449 6.3^*1 1.8e+14 6.3e+28 104 C2 C3 PHTX DST Java Movie Poor Event

2018/03/31 02:36:05 96 44 296 343 518 8.6^*1 1.7e+14 7.4e+28 111 C2 C3 PHTX DST Java Movie Poor Event

2018/03/31 03:36:06 80 14 262 326 410 5.4^*1 ---- ---- 80 C2 C3 PHTX DST Java Movie Poor Event

2018/03/31 08:12:05 113 24 200 240 494 9.0^*1 4.5e+14 8.9e+28 114 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/03/31 09:48:05 97 64 354 281 248 -4.8^*1 1.8e+15 1.1e+30 108 C2 C3 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
2018/03/01	20:48:05	283	37	202	204	214	0.3^*1	7.8e+12	1.6e+27	278	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/01	21:28:03	124	25	77	90	278	3.1^*1	3.1e+13	9.1e+26	119	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/02	01:25:40	271	55	359	360	369	0.4^*1	7.9e+14	5.1e+29	280	C2 C3 PHTX DST Java Movie
2018/03/03	04:48:07	267	34	285	211	0	-20.2^*1	8.3e+12	3.4e+27	277	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/03	07:24:05	273	31	242	364	441	8.0^*1	1.0e+13	3.0e+27	269	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/03/03	22:12:05	271	42	132	102	0	-4.6^*1	5.3e+13	4.6e+27	282	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/05	01:25:43	112	16	129	209	551	13.1^*1	----	----	108	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/05	07:24:05	268	35	222	305	639	16.0^*1	1.9e+14	4.8e+28	268	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/05	16:36:05	287	6	220	274	647	16.1^*1	----	----	280	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/06	01:25:41	234	136	127	157	284	3.0^*1	2.0e+14^*2	1.6e+28^*2	250	C2 C3 PHTX DST Java Movie	Very Poor Event; Partial Halo
2018/03/07	22:36:05	266	20	144	184	580	13.6^*1	1.3e+12	1.4e+26	260	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/09	13:25:43	286	11	229	251	654	16.3^*1	----	----	282	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/10	02:12:06	99	43	204	155	0	-5.6^*1	8.9e+13	1.9e+28	86	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/03/11	08:12:05	256	18	103	43	0	-14.1^*1	----	----	252	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/11	16:12:05	240	8	374	545	1496	91.8^*1	----	----	245	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/11	23:48:36	102	26	186	128	0	-8.9^*1	8.0e+13	1.4e+28	99	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/12	04:24:07	211	10	359	418	1028	40.1^*1	----	----	214	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/12	12:48:05	108	68	172	274	318	4.0^*1	4.7e+14	6.9e+28	93	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/15	04:36:05	297	16	234	277	353	3.9^*1	----	----	293	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/17	16:12:05	83	23	190	136	0	-29.2^*1	6.2e+12	1.1e+27	82	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/18	08:48:05	29	8	199	505	2540	270.9^*1	----	----	29	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/03/19	09:12:09	263	28	162	182	353	4.7^*1	4.1e+11	5.4e+25	261	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/19	18:24:05	297	11	302	347	698	17.3^*1	----	----	294	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/20	00:00:06	30	10	173	81	0	-32.0^*1	----	----	38	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/20	09:12:11	32	9	277	354	941	35.4^*1	----	----	36	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/20	15:12:10	26	7	330	159	0	-142.7^*1	----	----	32	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/22	00:48:05	40	12	282	707	2332	222.2^*1	----	----	42	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/22	14:36:05	91	32	243	250	383	3.8^*1	7.7e+12	2.3e+27	91	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/24	11:12:05	266	103	667	650	653	-1.5	1.8e+15	4.1e+30	271	C2 C3 PHTX DST Java Movie
2018/03/25	00:48:05	286	16	226	392	1086	48.6^*1	----	----	282	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/03/25	12:48:05	103	15	231	180	0	-18.0^*1	----	----	102	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/03/25	13:48:05	281	23	230	282	420	6.2^*1	2.5e+13	6.6e+27	277	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/03/25	17:24:06	263	63	291	155	0	-15.1^*1	3.3e+14	1.4e+29	262	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/26	10:36:05	100	48	136	124	0	-1.9^*1	3.4e+14	3.2e+28	103	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/27	01:25:42	265	80	297	244	0	-6.3^*1	2.7e+14	1.2e+29	267	C2 C3 PHTX DST Java Movie
2018/03/27	05:00:05	111	73	202	204	212	0.2^*1	7.9e+14	1.6e+29	108	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/28	12:00:05	103	59	194	216	315	2.9^*1	4.0e+14	7.6e+28	107	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/29	11:24:05	74	78	134	302	342	5.1^*1	1.7e+15	1.5e+29	80	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/29	20:12:05	276	36	209	155	0	-13.7^*1	1.7e+14	3.7e+28	273	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/30	05:00:05	91	59	217	128	0	-17.3^*1	6.7e+13	1.6e+28	105	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/30	08:48:22	94	59	274	308	502	8.2^*1	3.9e+14	1.5e+29	99	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/30	18:48:05	93	65	262	303	449	6.3^*1	1.8e+14	6.3e+28	104	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/31	02:36:05	96	44	296	343	518	8.6^*1	1.7e+14	7.4e+28	111	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/31	03:36:06	80	14	262	326	410	5.4^*1	----	----	80	C2 C3 PHTX DST Java Movie	Poor Event
2018/03/31	08:12:05	113	24	200	240	494	9.0^*1	4.5e+14	8.9e+28	114	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/03/31	09:48:05	97	64	354	281	248	-4.8^*1	1.8e+15	1.1e+30	108	C2 C3 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).