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

2018/09/01 02:24:05 267 32 175 222 475 8.9^*1 1.4e+13 2.2e+27 264 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/01 05:12:05 112 26 49 75 267 3.0^*1 1.3e+14 1.6e+27 110 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/02 00:00:05 268 41 202 234 253 1.5^*1 2.5e+14 5.0e+28 267 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/02 10:00:05 71 11 399 556 1515 92.1^*1 ---- ---- 78 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/02 12:24:06 67 13 191 257 804 25.8^*1 ---- ---- 72 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/02 19:12:05 55 109 214 193 120 -1.6^*1 9.4e+13 2.1e+28 52 C2 C3 PHTX DST Java Movie

2018/09/03 04:36:05 278 29 93 65 0 -3.1^*1 2.5e+14 1.1e+28 275 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/03 08:48:05 37 10 456 810 2155 198.4^*1 ---- ---- 43 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/06 01:25:41 265 28 121 85 0 -5.0^*1 2.3e+14 1.7e+28 267 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/07 12:00:05 279 60 184 368 577 14.0^*1 4.4e+14 7.5e+28 271 C2 C3 PHTX DST Java Movie Poor Event

2018/09/08 12:36:06 279 18 408 541 594 12.3 ---- ---- 272 C2 C3 PHTX DST Java Movie

2018/09/08 19:00:05 208 17 228 309 492 9.5^*1 ---- ---- 212 C2 C3 PHTX DST Java Movie Poor Event

2018/09/09 06:24:06 268 40 95 134 315 4.1^*1 2.1e+14 9.6e+27 266 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/09 07:36:05 240 15 178 227 312 3.5^*1 ---- ---- 236 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/11 08:00:05 149 11 300 266 0 -12.9^*1 ---- ---- 146 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/09/12 12:24:06 87 21 94 109 266 2.6^*1 4.1e+13 1.8e+27 92 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/09/12 18:00:05 147 15 557 644 1473 80.6^*1 ---- ---- 145 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/13 14:00:05 113 9 427 547 1446 83.4^*1 ---- ---- 117 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/16 04:36:05 244 16 262 154 0 -26.0^*1 ---- ---- 244 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/16 11:36:05 275 55 710 794 939 20.3 2.4e+14 5.9e+29 273 C2 C3 PHTX DST Java Movie

2018/09/16 15:05:47 284 25 460 393 0 -32.5^*1 3.9e+13 4.1e+28 273 C2 C3 PHTX DST Java Movie Only C2

2018/09/18 21:36:05 81 16 207 97 0 -45.7^*1 ---- ---- 92 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/19 01:36:09 234 20 398 640 1189 60.0^*1 4.5e+13 3.5e+28 238 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/19 08:24:05 290 41 406 535 1198 56.5^*1 6.7e+13 5.5e+28 281 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/20 16:48:05 7 15 469 510 937 28.8^*1 ---- ---- 8 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/21 08:24:05 263 11 500 638 1384 74.1^*1 ---- ---- 263 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/21 12:48:07 256 12 160 174 363 4.6^*1 ---- ---- 262 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/09/22 04:36:05 287 33 377 351 348 -1.8 9.9e+12 7.1e+27 288 C2 C3 PHTX DST Java Movie

2018/09/23 14:24:05 111 30 171 118 0 -20.9^*1 3.8e+13 5.5e+27 106 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/23 15:37:14 294 10 362 391 503 6.8^*1 ---- ---- 284 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/23 16:48:07 241 13 256 305 593 12.9^*1 ---- ---- 249 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/09/24 01:48:05 116 17 212 293 585 14.0^*1 ---- ---- 115 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/24 12:36:05 62 54 153 238 527 11.3^*1 1.9e+14 2.2e+28 66 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/27 06:48:05 81 19 142 234 363 5.6^*1 ---- ---- 91 C2 C3 PHTX DST Java Movie Very Poor Event

2018/09/28 08:12:05 88 24 189 247 518 10.4^*1 5.6e+12 1.0e+27 88 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/30 14:48:05 66 12 261 323 616 14.1^*1 ---- ---- 72 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/09/30 18:36:06 198 12 426 530 1229 58.1^*1 ---- ---- 199 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/09/30 21:36:05 194 8 338 236 0 -39.1^*1 ---- ---- 199 C2 C3 PHTX DST Java Movie Very 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
2018/09/01	02:24:05	267	32	175	222	475	8.9^*1	1.4e+13	2.2e+27	264	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/01	05:12:05	112	26	49	75	267	3.0^*1	1.3e+14	1.6e+27	110	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/02	00:00:05	268	41	202	234	253	1.5^*1	2.5e+14	5.0e+28	267	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/02	10:00:05	71	11	399	556	1515	92.1^*1	----	----	78	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/02	12:24:06	67	13	191	257	804	25.8^*1	----	----	72	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/02	19:12:05	55	109	214	193	120	-1.6^*1	9.4e+13	2.1e+28	52	C2 C3 PHTX DST Java Movie
2018/09/03	04:36:05	278	29	93	65	0	-3.1^*1	2.5e+14	1.1e+28	275	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/03	08:48:05	37	10	456	810	2155	198.4^*1	----	----	43	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/06	01:25:41	265	28	121	85	0	-5.0^*1	2.3e+14	1.7e+28	267	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/07	12:00:05	279	60	184	368	577	14.0^*1	4.4e+14	7.5e+28	271	C2 C3 PHTX DST Java Movie	Poor Event
2018/09/08	12:36:06	279	18	408	541	594	12.3	----	----	272	C2 C3 PHTX DST Java Movie
2018/09/08	19:00:05	208	17	228	309	492	9.5^*1	----	----	212	C2 C3 PHTX DST Java Movie	Poor Event
2018/09/09	06:24:06	268	40	95	134	315	4.1^*1	2.1e+14	9.6e+27	266	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/09	07:36:05	240	15	178	227	312	3.5^*1	----	----	236	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/11	08:00:05	149	11	300	266	0	-12.9^*1	----	----	146	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/09/12	12:24:06	87	21	94	109	266	2.6^*1	4.1e+13	1.8e+27	92	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/09/12	18:00:05	147	15	557	644	1473	80.6^*1	----	----	145	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/13	14:00:05	113	9	427	547	1446	83.4^*1	----	----	117	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/16	04:36:05	244	16	262	154	0	-26.0^*1	----	----	244	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/16	11:36:05	275	55	710	794	939	20.3	2.4e+14	5.9e+29	273	C2 C3 PHTX DST Java Movie
2018/09/16	15:05:47	284	25	460	393	0	-32.5^*1	3.9e+13	4.1e+28	273	C2 C3 PHTX DST Java Movie	Only C2
2018/09/18	21:36:05	81	16	207	97	0	-45.7^*1	----	----	92	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/19	01:36:09	234	20	398	640	1189	60.0^*1	4.5e+13	3.5e+28	238	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/19	08:24:05	290	41	406	535	1198	56.5^*1	6.7e+13	5.5e+28	281	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/20	16:48:05	7	15	469	510	937	28.8^*1	----	----	8	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/21	08:24:05	263	11	500	638	1384	74.1^*1	----	----	263	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/21	12:48:07	256	12	160	174	363	4.6^*1	----	----	262	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/09/22	04:36:05	287	33	377	351	348	-1.8	9.9e+12	7.1e+27	288	C2 C3 PHTX DST Java Movie
2018/09/23	14:24:05	111	30	171	118	0	-20.9^*1	3.8e+13	5.5e+27	106	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/23	15:37:14	294	10	362	391	503	6.8^*1	----	----	284	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/23	16:48:07	241	13	256	305	593	12.9^*1	----	----	249	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/09/24	01:48:05	116	17	212	293	585	14.0^*1	----	----	115	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/24	12:36:05	62	54	153	238	527	11.3^*1	1.9e+14	2.2e+28	66	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/27	06:48:05	81	19	142	234	363	5.6^*1	----	----	91	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/09/28	08:12:05	88	24	189	247	518	10.4^*1	5.6e+12	1.0e+27	88	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/30	14:48:05	66	12	261	323	616	14.1^*1	----	----	72	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/09/30	18:36:06	198	12	426	530	1229	58.1^*1	----	----	199	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/09/30	21:36:05	194	8	338	236	0	-39.1^*1	----	----	199	C2 C3 PHTX DST Java Movie	Very 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).