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

2008/08/01 07:06:04 171 8 142 163 481 8.9^*1 ---- ---- 171 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/01 13:06:04 58 5 387 400 469 3.4^*1 ---- ---- 65 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/01 17:30:04 64 8 387 329 0 -18.1^*1 ---- ---- 71 C2 C3 195 PHTX DST Java Movie

2008/08/03 10:34:01 20 10 257 296 789 24.1^*1 ---- ---- 25 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/03 17:54:04 296 26 102 108 139 0.4^*1 6.4e+13 3.3e+27 293 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/03 21:30:07 20 5 559 902 2644 303.8^*1 ---- ---- 26 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2008/08/04 22:30:05 124 23 251 375 421 6.9^*1 9.1e+12 2.9e+27 119 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/05 03:30:04 121 20 286 377 645 17.7^*1 6.5e+12 2.7e+27 110 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/06 22:30:04 114 32 118 125 158 0.5^*1 2.5e+14 1.7e+28 109 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/07 00:30:04 284 15 225 382 1131 52.0^*1 ---- ---- 284 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/07 01:31:39 109 48 130 250 273 3.2^*1 1.1e+15 9.4e+28 110 C2 C3 195 PHTX DST Java Movie Poor Event

2008/08/07 02:06:04 354 6 386 452 862 26.7^*1 ---- ---- 355 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/08 02:54:04 42 7 244 302 796 25.5^*1 ---- ---- 48 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/08 06:30:04 127 8 213 254 327 3.3^*1 ---- ---- 119 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/08 06:54:26 69 14 118 119 149 0.4^*1 ---- ---- 70 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/08 17:12:36 99 8 339 238 0 -94.0^*1 ---- ---- 95 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/08 20:00:04 285 13 311 394 538 9.8^*1 ---- ---- 284 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/10 13:00:04 99 8 299 232 0 -12.7^*1 ---- ---- 94 C2 C3 PHTX DST Java Movie Very Poor Event

2008/08/10 14:24:04 111 12 294 203 0 -10.4^*1 ---- ---- 113 C2 C3 PHTX DST Java Movie Very Poor Event

2008/08/11 07:24:04 73 20 258 336 789 23.9^*1 1.7e+13 5.6e+27 72 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/12 17:00:04 208 12 343 334 208 -3.4^*1 ---- ---- 213 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/14 22:36:06 251 8 175 234 351 5.0^*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Very Poor Event

2008/08/15 09:00:04 82 61 140 218 247 2.5^*1 1.2e+15 1.2e+29 84 C2 C3 PHTX DST Java Movie

2008/08/16 14:36:04 263 26 201 184 116 -1.4^*1 5.7e+13 1.2e+28 257 C2 C3 PHTX DST Java Movie Poor Event

2008/08/16 19:24:04 259 40 237 407 452 8.2 8.4e+14 2.3e+29 268 C2 C3 PHTX DST Java Movie

2008/08/17 00:24:04 258 35 334 374 355 1.6 8.6e+14 4.8e+29 275 C2 C3 PHTX DST Java Movie

2008/08/19 13:24:04 94 34 170 329 300 3.9^*1 1.1e+15 1.5e+29 89 C2 C3 PHTX DST Java Movie

2008/08/22 21:50:36 252 7 242 231 0 -3.1^*1 ---- ---- 257 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/23 19:30:05 314 10 546 429 166 -17.3 ---- ---- 303 C2 C3 195 PHTX DST Java Movie

2008/08/24 10:44:11 270 19 263 230 126 -3.4^*1 ---- ---- 280 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/24 21:30:07 199 5 213 --- --- --- ---- ---- 103 C2 C3 195 PHTX DST Java Movie only two points; Very Poor Event; Only 2 points; Only C2

2008/08/25 05:30:04 305 6 147 179 249 2.0^*1 ---- ---- 304 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/25 06:54:04 267 15 214 262 300 2.7^*1 ---- ---- 273 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/25 09:54:04 85 6 300 145 0 -90.3^*1 ---- ---- 91 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/26 06:30:04 68 5 230 234 332 2.5^*1 ---- ---- 67 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2008/08/26 10:54:04 195 5 644 303 0 -331.2^*1 ---- ---- 200 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2008/08/26 23:30:04 272 37 271 369 651 16.5^*1 1.2e+14 4.6e+28 268 C2 C3 195 PHTX DST Java Movie Poor Event

2008/08/27 00:06:04 69 20 125 115 0 -1.5^*1 1.6e+14 1.3e+28 66 C2 C3 195 PHTX DST Java Movie Poor Event

2008/08/27 22:06:04 75 4 192 212 558 11.6^*1 ---- ---- 76 C2 C3 195 PHTX DST Java Movie Poor Event; Only 3 points; Only C2

2008/08/28 01:30:04 75 9 277 215 0 -18.5^*1 ---- ---- 76 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/28 16:30:05 355 9 251 167 0 -35.3^*1 ---- ---- 353 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/28 19:30:04 112 12 259 334 419 6.8^*1 ---- ---- 111 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/29 00:30:04 190 5 434 329 0 -59.2^*1 ---- ---- 194 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/29 08:54:28 357 9 431 464 785 18.7^*1 ---- ---- 354 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2008/08/29 13:06:04 30 7 348 309 0 -27.1^*1 ---- ---- 32 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2008/08/29 21:08:02 72 29 158 165 184 0.5^*1 1.7e+14 2.1e+28 71 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/30 01:30:04 271 53 62 96 229 2.1^*1 2.2e+14 4.3e+27 277 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2008/08/30 15:06:04 285 51 158 218 333 4.9^*1 8.1e+14 1.0e+29 273 C2 C3 195 PHTX DST Java Movie Very Poor Event

2008/08/30 17:30:05 186 146 190 390 390 6.5^*1 1.2e+15^*2 2.2e+29^*2 174 C2 C3 195 PHTX DST Java Movie Poor Event; Partial Halo

2008/08/31 01:06:04 279 36 266 229 197 -2.1^*1 1.5e+14 5.2e+28 276 C2 C3 195 PHTX DST Java Movie Poor Event

2008/08/31 09:30:04 192 6 518 415 0 -56.1^*1 ---- ---- 195 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2008/08/31 21:54:04 109 22 205 238 476 8.3^*1 6.3e+13 1.3e+28 102 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

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
2008/08/01	07:06:04	171	8	142	163	481	8.9^*1	----	----	171	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/01	13:06:04	58	5	387	400	469	3.4^*1	----	----	65	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/01	17:30:04	64	8	387	329	0	-18.1^*1	----	----	71	C2 C3 195 PHTX DST Java Movie
2008/08/03	10:34:01	20	10	257	296	789	24.1^*1	----	----	25	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/03	17:54:04	296	26	102	108	139	0.4^*1	6.4e+13	3.3e+27	293	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/03	21:30:07	20	5	559	902	2644	303.8^*1	----	----	26	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2008/08/04	22:30:05	124	23	251	375	421	6.9^*1	9.1e+12	2.9e+27	119	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/05	03:30:04	121	20	286	377	645	17.7^*1	6.5e+12	2.7e+27	110	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/06	22:30:04	114	32	118	125	158	0.5^*1	2.5e+14	1.7e+28	109	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/07	00:30:04	284	15	225	382	1131	52.0^*1	----	----	284	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/07	01:31:39	109	48	130	250	273	3.2^*1	1.1e+15	9.4e+28	110	C2 C3 195 PHTX DST Java Movie	Poor Event
2008/08/07	02:06:04	354	6	386	452	862	26.7^*1	----	----	355	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/08	02:54:04	42	7	244	302	796	25.5^*1	----	----	48	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/08	06:30:04	127	8	213	254	327	3.3^*1	----	----	119	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/08	06:54:26	69	14	118	119	149	0.4^*1	----	----	70	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/08	17:12:36	99	8	339	238	0	-94.0^*1	----	----	95	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/08	20:00:04	285	13	311	394	538	9.8^*1	----	----	284	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/10	13:00:04	99	8	299	232	0	-12.7^*1	----	----	94	C2 C3 PHTX DST Java Movie	Very Poor Event
2008/08/10	14:24:04	111	12	294	203	0	-10.4^*1	----	----	113	C2 C3 PHTX DST Java Movie	Very Poor Event
2008/08/11	07:24:04	73	20	258	336	789	23.9^*1	1.7e+13	5.6e+27	72	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/12	17:00:04	208	12	343	334	208	-3.4^*1	----	----	213	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/14	22:36:06	251	8	175	234	351	5.0^*1	----	----	252	C2 C3 PHTX DST Java Movie	Very Poor Event
2008/08/15	09:00:04	82	61	140	218	247	2.5^*1	1.2e+15	1.2e+29	84	C2 C3 PHTX DST Java Movie
2008/08/16	14:36:04	263	26	201	184	116	-1.4^*1	5.7e+13	1.2e+28	257	C2 C3 PHTX DST Java Movie	Poor Event
2008/08/16	19:24:04	259	40	237	407	452	8.2	8.4e+14	2.3e+29	268	C2 C3 PHTX DST Java Movie
2008/08/17	00:24:04	258	35	334	374	355	1.6	8.6e+14	4.8e+29	275	C2 C3 PHTX DST Java Movie
2008/08/19	13:24:04	94	34	170	329	300	3.9^*1	1.1e+15	1.5e+29	89	C2 C3 PHTX DST Java Movie
2008/08/22	21:50:36	252	7	242	231	0	-3.1^*1	----	----	257	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/23	19:30:05	314	10	546	429	166	-17.3	----	----	303	C2 C3 195 PHTX DST Java Movie
2008/08/24	10:44:11	270	19	263	230	126	-3.4^*1	----	----	280	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/24	21:30:07	199	5	213	---	---	---	----	----	103	C2 C3 195 PHTX DST Java Movie	only two points; Very Poor Event; Only 2 points; Only C2
2008/08/25	05:30:04	305	6	147	179	249	2.0^*1	----	----	304	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/25	06:54:04	267	15	214	262	300	2.7^*1	----	----	273	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/25	09:54:04	85	6	300	145	0	-90.3^*1	----	----	91	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/26	06:30:04	68	5	230	234	332	2.5^*1	----	----	67	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2008/08/26	10:54:04	195	5	644	303	0	-331.2^*1	----	----	200	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2008/08/26	23:30:04	272	37	271	369	651	16.5^*1	1.2e+14	4.6e+28	268	C2 C3 195 PHTX DST Java Movie	Poor Event
2008/08/27	00:06:04	69	20	125	115	0	-1.5^*1	1.6e+14	1.3e+28	66	C2 C3 195 PHTX DST Java Movie	Poor Event
2008/08/27	22:06:04	75	4	192	212	558	11.6^*1	----	----	76	C2 C3 195 PHTX DST Java Movie	Poor Event; Only 3 points; Only C2
2008/08/28	01:30:04	75	9	277	215	0	-18.5^*1	----	----	76	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/28	16:30:05	355	9	251	167	0	-35.3^*1	----	----	353	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/28	19:30:04	112	12	259	334	419	6.8^*1	----	----	111	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/29	00:30:04	190	5	434	329	0	-59.2^*1	----	----	194	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/29	08:54:28	357	9	431	464	785	18.7^*1	----	----	354	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2008/08/29	13:06:04	30	7	348	309	0	-27.1^*1	----	----	32	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2008/08/29	21:08:02	72	29	158	165	184	0.5^*1	1.7e+14	2.1e+28	71	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/30	01:30:04	271	53	62	96	229	2.1^*1	2.2e+14	4.3e+27	277	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2008/08/30	15:06:04	285	51	158	218	333	4.9^*1	8.1e+14	1.0e+29	273	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2008/08/30	17:30:05	186	146	190	390	390	6.5^*1	1.2e+15^*2	2.2e+29^*2	174	C2 C3 195 PHTX DST Java Movie	Poor Event; Partial Halo
2008/08/31	01:06:04	279	36	266	229	197	-2.1^*1	1.5e+14	5.2e+28	276	C2 C3 195 PHTX DST Java Movie	Poor Event
2008/08/31	09:30:04	192	6	518	415	0	-56.1^*1	----	----	195	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2008/08/31	21:54:04	109	22	205	238	476	8.3^*1	6.3e+13	1.3e+28	102	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2

*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).