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

2018/04/01 00:12:05 77 23 258 272 325 2.1^*1 2.4e+12 8.0e+26 82 C2 C3 PHTX DST Java Movie Very Poor Event

2018/04/02 11:24:05 257 21 204 56 0 -64.7^*1 1.1e+13 2.2e+27 258 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/02 12:36:07 259 33 197 244 613 14.6^*1 2.0e+13 3.9e+27 258 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/03 17:24:05 25 10 653 668 855 13.4^*1 ---- ---- 28 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/04 13:48:05 93 58 276 396 1090 50.8^*1 1.0e+13 3.9e+27 101 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/05 11:48:05 290 7 457 551 1277 63.3^*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/06 00:24:06 103 47 70 72 100 0.2^*1 7.1e+13 1.7e+27 99 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/06 05:36:05 266 32 136 202 598 15.0^*1 1.1e+13 1.1e+27 263 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/06 12:36:05 262 22 138 107 0 -9.7^*1 4.4e+12 4.2e+26 261 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/06 22:24:06 207 20 283 247 0 -16.8^*1 4.8e+12^*2 1.9e+27^*2 204 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/06 23:48:05 261 35 154 191 467 8.4^*1 3.1e+13 3.7e+27 264 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/08 15:48:06 261 6 208 190 0 -5.6^*1 ---- ---- 263 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/08 23:12:10 263 27 149 66 0 -25.1^*1 1.0e+13 1.2e+27 264 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/09 14:12:05 263 33 187 183 137 -0.7^*1 3.2e+13 5.6e+27 263 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/04/10 02:00:05 257 28 139 73 0 -14.6^*1 2.2e+12 2.1e+26 258 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/10 09:12:09 13 9 477 424 0 -49.0^*1 ---- ---- 20 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/11 01:36:10 263 41 211 303 410 6.2^*1 3.4e+14 7.5e+28 263 C2 C3 PHTX DST Java Movie Poor Event

2018/04/13 03:47:12 182 9 325 579 1813 141.1^*1 ---- ---- 184 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/13 08:48:23 181 10 338 500 1803 143.4^*1 ---- ---- 185 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/04/14 00:12:05 110 16 286 174 0 -39.0^*1 ---- ---- 103 C2 C3 PHTX DST Java Movie Poor Event

2018/04/14 19:48:05 101 48 225 260 383 4.6^*1 2.3e+14 5.9e+28 99 C2 C3 PHTX DST Java Movie Poor Event

2018/04/15 00:48:05 100 44 252 249 218 -0.7^*1 1.7e+14 5.4e+28 99 C2 C3 PHTX DST Java Movie Poor Event

2018/04/15 05:36:05 99 52 336 339 341 0.2 1.0e+15 5.8e+29 92 C2 C3 PHTX DST Java Movie

2018/04/16 16:48:05 102 21 318 402 505 9.1^*1 2.2e+13 1.1e+28 97 C2 C3 PHTX DST Java Movie Very Poor Event

2018/04/17 04:12:05 247 55 250 484 532 11.6^*1 9.7e+14 3.0e+29 249 C2 C3 PHTX DST Java Movie

2018/04/17 12:48:05 76 13 210 340 1078 48.4^*1 ---- ---- 78 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/18 01:36:09 252 8 273 320 421 5.7^*1 ---- ---- 256 C2 C3 PHTX DST Java Movie Very Poor Event

2018/04/18 07:24:05 252 9 323 303 229 -2.7^*1 ---- ---- 254 C2 C3 PHTX DST Java Movie Poor Event

2018/04/18 12:48:05 195 99 96 151 374 5.7^*1 2.1e+14 9.8e+27 190 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/19 17:12:05 223 33 256 337 730 21.7^*1 2.0e+13 6.6e+27 242 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/19 19:00:06 166 55 225 279 423 6.3^*1 8.3e+13 2.1e+28 166 C2 C3 PHTX DST Java Movie Very Poor Event

2018/04/20 00:12:05 282 34 74 64 0 -1.3^*1 1.2e+14 3.4e+27 281 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/20 14:48:05 282 23 243 391 400 6.6^*1 1.5e+14 4.3e+28 276 C2 C3 PHTX DST Java Movie Poor Event

2018/04/21 02:00:05 82 54 136 136 122 -0.2^*1 2.9e+13 2.7e+27 82 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/21 08:48:05 275 31 465 456 457 -0.6^*1 1.6e+14 1.8e+29 272 C2 C3 PHTX DST Java Movie

2018/04/21 20:00:05 268 17 252 204 0 -14.8^*1 ---- ---- 273 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/22 16:24:05 91 37 200 192 126 -1.2^*1 4.2e+13 8.5e+27 88 C2 C3 PHTX DST Java Movie Poor Event

2018/04/22 22:24:05 344 6 302 322 567 10.3^*1 ---- ---- 342 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/23 05:36:05 91 21 255 268 281 0.9^*1 3.7e+12 1.2e+27 96 C2 C3 PHTX DST Java Movie Very Poor Event

2018/04/23 14:48:06 85 15 242 318 495 9.2^*1 ---- ---- 90 C2 C3 PHTX DST Java Movie Very Poor Event

2018/04/24 02:48:05 278 33 169 199 699 19.5^*1 8.5e+12^*2 1.2e+27^*2 275 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/24 23:36:05 275 26 124 0 0 -23.9^*1 3.2e+13 2.5e+27 277 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/25 02:48:06 247 7 352 426 841 27.0^*1 ---- ---- 248 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/04/26 02:48:05 93 36 202 204 228 0.5^*1 1.4e+14 2.8e+28 97 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/04/26 08:48:05 86 12 288 442 798 27.4^*1 ---- ---- 89 C2 C3 PHTX DST Java Movie Poor Event

2018/04/27 20:36:05 300 11 422 730 1828 139.5^*1 ---- ---- 296 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/04/29 03:02:52 85 28 139 65 0 -5.7^*1 1.2e+14 1.2e+28 86 C3 PHTX DST Java Movie Very Poor Event; Only C3

2018/04/30 03:04:05 109 26 127 154 238 2.3^*1 8.6e+12 6.9e+26 104 C3 PHTX DST Java Movie Poor Event; Only C3

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
2018/04/01	00:12:05	77	23	258	272	325	2.1^*1	2.4e+12	8.0e+26	82	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/04/02	11:24:05	257	21	204	56	0	-64.7^*1	1.1e+13	2.2e+27	258	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/02	12:36:07	259	33	197	244	613	14.6^*1	2.0e+13	3.9e+27	258	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/03	17:24:05	25	10	653	668	855	13.4^*1	----	----	28	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/04	13:48:05	93	58	276	396	1090	50.8^*1	1.0e+13	3.9e+27	101	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/05	11:48:05	290	7	457	551	1277	63.3^*1	----	----	282	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/06	00:24:06	103	47	70	72	100	0.2^*1	7.1e+13	1.7e+27	99	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/06	05:36:05	266	32	136	202	598	15.0^*1	1.1e+13	1.1e+27	263	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/06	12:36:05	262	22	138	107	0	-9.7^*1	4.4e+12	4.2e+26	261	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/06	22:24:06	207	20	283	247	0	-16.8^*1	4.8e+12^*2	1.9e+27^*2	204	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/06	23:48:05	261	35	154	191	467	8.4^*1	3.1e+13	3.7e+27	264	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/08	15:48:06	261	6	208	190	0	-5.6^*1	----	----	263	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/08	23:12:10	263	27	149	66	0	-25.1^*1	1.0e+13	1.2e+27	264	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/09	14:12:05	263	33	187	183	137	-0.7^*1	3.2e+13	5.6e+27	263	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/04/10	02:00:05	257	28	139	73	0	-14.6^*1	2.2e+12	2.1e+26	258	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/10	09:12:09	13	9	477	424	0	-49.0^*1	----	----	20	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/11	01:36:10	263	41	211	303	410	6.2^*1	3.4e+14	7.5e+28	263	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/13	03:47:12	182	9	325	579	1813	141.1^*1	----	----	184	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/13	08:48:23	181	10	338	500	1803	143.4^*1	----	----	185	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/04/14	00:12:05	110	16	286	174	0	-39.0^*1	----	----	103	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/14	19:48:05	101	48	225	260	383	4.6^*1	2.3e+14	5.9e+28	99	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/15	00:48:05	100	44	252	249	218	-0.7^*1	1.7e+14	5.4e+28	99	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/15	05:36:05	99	52	336	339	341	0.2	1.0e+15	5.8e+29	92	C2 C3 PHTX DST Java Movie
2018/04/16	16:48:05	102	21	318	402	505	9.1^*1	2.2e+13	1.1e+28	97	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/04/17	04:12:05	247	55	250	484	532	11.6^*1	9.7e+14	3.0e+29	249	C2 C3 PHTX DST Java Movie
2018/04/17	12:48:05	76	13	210	340	1078	48.4^*1	----	----	78	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/18	01:36:09	252	8	273	320	421	5.7^*1	----	----	256	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/04/18	07:24:05	252	9	323	303	229	-2.7^*1	----	----	254	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/18	12:48:05	195	99	96	151	374	5.7^*1	2.1e+14	9.8e+27	190	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/19	17:12:05	223	33	256	337	730	21.7^*1	2.0e+13	6.6e+27	242	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/19	19:00:06	166	55	225	279	423	6.3^*1	8.3e+13	2.1e+28	166	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/04/20	00:12:05	282	34	74	64	0	-1.3^*1	1.2e+14	3.4e+27	281	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/20	14:48:05	282	23	243	391	400	6.6^*1	1.5e+14	4.3e+28	276	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/21	02:00:05	82	54	136	136	122	-0.2^*1	2.9e+13	2.7e+27	82	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/21	08:48:05	275	31	465	456	457	-0.6^*1	1.6e+14	1.8e+29	272	C2 C3 PHTX DST Java Movie
2018/04/21	20:00:05	268	17	252	204	0	-14.8^*1	----	----	273	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/22	16:24:05	91	37	200	192	126	-1.2^*1	4.2e+13	8.5e+27	88	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/22	22:24:05	344	6	302	322	567	10.3^*1	----	----	342	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/23	05:36:05	91	21	255	268	281	0.9^*1	3.7e+12	1.2e+27	96	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/04/23	14:48:06	85	15	242	318	495	9.2^*1	----	----	90	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/04/24	02:48:05	278	33	169	199	699	19.5^*1	8.5e+12^*2	1.2e+27^*2	275	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/24	23:36:05	275	26	124	0	0	-23.9^*1	3.2e+13	2.5e+27	277	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/25	02:48:06	247	7	352	426	841	27.0^*1	----	----	248	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/04/26	02:48:05	93	36	202	204	228	0.5^*1	1.4e+14	2.8e+28	97	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/04/26	08:48:05	86	12	288	442	798	27.4^*1	----	----	89	C2 C3 PHTX DST Java Movie	Poor Event
2018/04/27	20:36:05	300	11	422	730	1828	139.5^*1	----	----	296	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/04/29	03:02:52	85	28	139	65	0	-5.7^*1	1.2e+14	1.2e+28	86	C3 PHTX DST Java Movie	Very Poor Event; Only C3
2018/04/30	03:04:05	109	26	127	154	238	2.3^*1	8.6e+12	6.9e+26	104	C3 PHTX DST Java Movie	Poor Event; Only C3

*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).