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

2017/05/01 00:12:05 86 23 191 283 568 14.0^*1 2.8e+13 5.0e+27 87 C2 C3 PHTX DST Java Movie Very Poor Event

2017/05/01 04:24:05 284 66 680 518 0 -38.0^*1 8.4e+14 1.9e+30 290 C2 C3 PHTX DST Java Movie

2017/05/01 13:36:08 288 61 310 396 744 21.0^*1 2.9e+14 1.4e+29 295 C2 C3 PHTX DST Java Movie Poor Event

2017/05/02 02:36:05 73 16 218 392 1701 121.5^*1 ---- ---- 77 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/02 08:36:05 85 63 391 530 497 7.3 3.8e+15 2.9e+30 84 C2 C3 PHTX DST Java Movie

2017/05/03 23:24:05 121 20 308 367 453 6.1^*1 4.7e+14 2.2e+29 130 C2 C3 PHTX DST Java Movie

2017/05/04 00:12:05 128 50 316 367 462 6.4^*1 1.4e+15 6.9e+29 129 C2 C3 PHTX DST Java Movie

2017/05/04 05:24:05 123 31 223 223 213 -0.2^*1 1.7e+13 4.2e+27 126 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/04 10:12:06 130 21 222 224 248 0.6^*1 2.1e+13 5.2e+27 126 C2 C3 PHTX DST Java Movie Poor Event

2017/05/04 20:00:06 51 144 146 246 299 3.7^*1 2.1e+15^*2 2.2e+29^*2 51 C2 C3 PHTX DST Java Movie Poor Event; Partial Halo

2017/05/06 02:00:05 120 56 160 218 293 3.1^*1 1.3e+15 1.6e+29 101 C2 C3 PHTX DST Java Movie Poor Event

2017/05/07 04:00:05 116 12 416 442 554 7.2^*1 ---- ---- 114 C2 C3 PHTX DST Java Movie Poor Event

2017/05/07 18:48:05 274 47 174 164 0 -3.5^*1 5.0e+13 7.6e+27 279 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/08 13:36:08 103 32 198 216 305 2.7^*1 2.2e+14 4.3e+28 101 C2 C3 PHTX DST Java Movie Poor Event

2017/05/09 08:12:06 270 44 103 0 0 -23.1^*1 8.3e+13 4.4e+27 268 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/09 11:12:05 271 49 107 106 99 -0.1^*1 2.3e+14 1.3e+28 282 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/10 10:36:05 198 13 893 735 0 -147.7^*1 ---- ---- 199 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/11 08:12:05 14 9 436 517 1376 74.1^*1 ---- ---- 17 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/11 17:36:05 81 14 340 444 964 36.3^*1 ---- ---- 79 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/12 00:36:06 111 16 203 197 149 -1.0^*1 ---- ---- 107 C2 C3 PHTX DST Java Movie Very Poor Event

2017/05/12 01:36:12 56 49 68 38 0 -7.0^*1 1.1e+14 2.6e+27 59 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/13 11:48:05 76 48 101 105 153 0.6^*1 1.7e+14 8.5e+27 73 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/13 15:36:05 115 37 80 95 169 1.0^*1 3.5e+14 1.1e+28 111 C2 C3 PHTX DST Java Movie Poor Event

2017/05/13 21:36:05 173 206 169 249 377 5.5^*1 2.7e+15^*2 3.8e+29^*2 230 C2 C3 PHTX DST Java Movie Poor Event; Partial Halo

2017/05/14 04:12:05 78 24 171 139 0 -10.4^*1 1.0e+14 1.5e+28 79 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/14 13:48:05 69 61 155 52 0 -27.0^*1 1.3e+14 1.6e+28 69 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/15 01:12:05 279 44 256 363 648 16.3^*1 3.6e+14 1.2e+29 284 C2 C3 PHTX DST Java Movie Poor Event

2017/05/15 04:00:05 52 21 264 331 408 5.8^*1 1.6e+14 5.7e+28 50 C2 C3 PHTX DST Java Movie Poor Event

2017/05/15 17:00:05 206 9 441 348 0 -65.2^*1 ---- ---- 208 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/16 11:00:07 124 12 225 283 762 23.0^*1 ---- ---- 125 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/17 02:24:05 97 28 140 135 0 -3.2^*1 3.5e+13 3.4e+27 100 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/17 03:24:05 96 41 165 135 0 -9.5^*1 6.1e+13 8.3e+27 97 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/17 06:00:05 92 42 189 192 222 0.6^*1 1.6e+14 2.8e+28 94 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/18 17:12:05 92 46 200 138 0 -11.9^*1 ---- ---- 99 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/21 01:00:05 99 44 483 660 827 24.0 1.8e+14 2.1e+29 105 C2 C3 PHTX DST Java Movie

2017/05/21 04:48:05 91 9 518 415 0 -19.8^*1 ---- ---- 97 C2 C3 PHTX DST Java Movie Poor Event

2017/05/22 18:36:05 34 9 371 305 0 -44.5^*1 ---- ---- 34 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/23 05:00:06 215 243 259 338 367 4.1^*1 8.5e+15^*2 2.8e+30^*2 281 C2 C3 PHTX DST Java Movie Partial Halo

2017/05/23 15:24:06 230 12 307 248 0 -15.6^*1 ---- ---- 230 C2 C3 PHTX DST Java Movie Only C2

2017/05/23 19:48:05 294 16 241 315 454 7.5^*1 ---- ---- 297 C2 C3 PHTX DST Java Movie

2017/05/23 20:00:05 278 13 615 615 620 0.3^*1 ---- ---- 281 C2 C3 PHTX DST Java Movie Only C2

2017/05/23 22:36:05 227 35 192 233 410 6.1^*1 5.8e+13 1.1e+28 224 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/23 23:36:05 90 26 164 251 858 30.0^*1 5.7e+13 7.7e+27 88 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/24 00:48:05 279 26 601 773 1447 78.5^*1 1.6e+14 2.8e+29 281 C2 C3 PHTX DST Java Movie Only C2

2017/05/24 01:36:05 220 26 270 294 345 2.4^*1 3.5e+14 1.3e+29 221 C2 C3 PHTX DST Java Movie Poor Event

2017/05/24 04:36:05 230 22 212 229 288 1.9^*1 3.1e+13 6.9e+27 225 C2 C3 PHTX DST Java Movie Poor Event

2017/05/24 06:00:05 295 38 508 388 0 -45.2^*1 2.7e+14 3.5e+29 287 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/24 09:12:09 280 20 326 379 685 16.5^*1 1.0e+14 5.4e+28 281 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/24 23:57:41 306 63 259 285 594 14.1^*1 2.1e+14 7.1e+28 303 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/25 12:24:06 303 22 237 236 232 -0.1^*1 6.0e+13 1.7e+28 302 C2 C3 PHTX DST Java Movie Poor Event

2017/05/25 14:36:05 301 61 321 373 380 3.0^*1 6.7e+14 3.5e+29 301 C2 C3 PHTX DST Java Movie

2017/05/26 01:00:06 88 37 42 43 58 0.1^*1 2.9e+14 2.6e+27 89 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/27 00:24:05 39 14 296 300 359 1.8^*1 ---- ---- 42 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/27 00:48:05 302 29 320 555 1616 122.1^*1 7.3e+13^*2 3.7e+28^*2 300 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/27 22:36:05 350 8 345 678 2029 173.0^*1 ---- ---- 351 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/05/28 02:48:05 257 36 118 169 473 9.1^*1 4.0e+14 2.8e+28 253 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/28 05:24:05 255 33 235 324 471 8.2^*1 3.1e+14 8.4e+28 257 C2 C3 PHTX DST Java Movie

2017/05/29 05:36:05 262 17 193 206 299 2.4^*1 ---- ---- 262 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/29 08:24:05 103 71 266 425 358 4.8 7.5e+15 2.7e+30 97 C2 C3 PHTX DST Java Movie

2017/05/29 20:12:05 264 41 191 168 0 -3.9^*1 4.1e+14 7.5e+28 259 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/30 16:36:05 81 30 195 217 380 4.7^*1 1.3e+14 2.4e+28 95 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/05/30 20:36:05 101 100 137 187 312 3.8^*1 2.7e+14 2.5e+28 95 C2 C3 PHTX DST Java Movie Poor Event

2017/05/31 09:12:10 258 52 212 218 256 1.0^*1 7.9e+14 1.8e+29 258 C2 C3 PHTX DST Java Movie Poor Event

2017/05/31 23:12:11 85 37 71 86 326 4.4^*1 1.3e+14 3.2e+27 94 C2 C3 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
2017/05/01	00:12:05	86	23	191	283	568	14.0^*1	2.8e+13	5.0e+27	87	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/05/01	04:24:05	284	66	680	518	0	-38.0^*1	8.4e+14	1.9e+30	290	C2 C3 PHTX DST Java Movie
2017/05/01	13:36:08	288	61	310	396	744	21.0^*1	2.9e+14	1.4e+29	295	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/02	02:36:05	73	16	218	392	1701	121.5^*1	----	----	77	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/02	08:36:05	85	63	391	530	497	7.3	3.8e+15	2.9e+30	84	C2 C3 PHTX DST Java Movie
2017/05/03	23:24:05	121	20	308	367	453	6.1^*1	4.7e+14	2.2e+29	130	C2 C3 PHTX DST Java Movie
2017/05/04	00:12:05	128	50	316	367	462	6.4^*1	1.4e+15	6.9e+29	129	C2 C3 PHTX DST Java Movie
2017/05/04	05:24:05	123	31	223	223	213	-0.2^*1	1.7e+13	4.2e+27	126	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/04	10:12:06	130	21	222	224	248	0.6^*1	2.1e+13	5.2e+27	126	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/04	20:00:06	51	144	146	246	299	3.7^*1	2.1e+15^*2	2.2e+29^*2	51	C2 C3 PHTX DST Java Movie	Poor Event; Partial Halo
2017/05/06	02:00:05	120	56	160	218	293	3.1^*1	1.3e+15	1.6e+29	101	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/07	04:00:05	116	12	416	442	554	7.2^*1	----	----	114	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/07	18:48:05	274	47	174	164	0	-3.5^*1	5.0e+13	7.6e+27	279	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/08	13:36:08	103	32	198	216	305	2.7^*1	2.2e+14	4.3e+28	101	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/09	08:12:06	270	44	103	0	0	-23.1^*1	8.3e+13	4.4e+27	268	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/09	11:12:05	271	49	107	106	99	-0.1^*1	2.3e+14	1.3e+28	282	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/10	10:36:05	198	13	893	735	0	-147.7^*1	----	----	199	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/11	08:12:05	14	9	436	517	1376	74.1^*1	----	----	17	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/11	17:36:05	81	14	340	444	964	36.3^*1	----	----	79	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/12	00:36:06	111	16	203	197	149	-1.0^*1	----	----	107	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/05/12	01:36:12	56	49	68	38	0	-7.0^*1	1.1e+14	2.6e+27	59	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/13	11:48:05	76	48	101	105	153	0.6^*1	1.7e+14	8.5e+27	73	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/13	15:36:05	115	37	80	95	169	1.0^*1	3.5e+14	1.1e+28	111	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/13	21:36:05	173	206	169	249	377	5.5^*1	2.7e+15^*2	3.8e+29^*2	230	C2 C3 PHTX DST Java Movie	Poor Event; Partial Halo
2017/05/14	04:12:05	78	24	171	139	0	-10.4^*1	1.0e+14	1.5e+28	79	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/14	13:48:05	69	61	155	52	0	-27.0^*1	1.3e+14	1.6e+28	69	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/15	01:12:05	279	44	256	363	648	16.3^*1	3.6e+14	1.2e+29	284	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/15	04:00:05	52	21	264	331	408	5.8^*1	1.6e+14	5.7e+28	50	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/15	17:00:05	206	9	441	348	0	-65.2^*1	----	----	208	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/16	11:00:07	124	12	225	283	762	23.0^*1	----	----	125	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/17	02:24:05	97	28	140	135	0	-3.2^*1	3.5e+13	3.4e+27	100	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/17	03:24:05	96	41	165	135	0	-9.5^*1	6.1e+13	8.3e+27	97	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/17	06:00:05	92	42	189	192	222	0.6^*1	1.6e+14	2.8e+28	94	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/18	17:12:05	92	46	200	138	0	-11.9^*1	----	----	99	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/21	01:00:05	99	44	483	660	827	24.0	1.8e+14	2.1e+29	105	C2 C3 PHTX DST Java Movie
2017/05/21	04:48:05	91	9	518	415	0	-19.8^*1	----	----	97	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/22	18:36:05	34	9	371	305	0	-44.5^*1	----	----	34	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/23	05:00:06	215	243	259	338	367	4.1^*1	8.5e+15^*2	2.8e+30^*2	281	C2 C3 PHTX DST Java Movie	Partial Halo
2017/05/23	15:24:06	230	12	307	248	0	-15.6^*1	----	----	230	C2 C3 PHTX DST Java Movie	Only C2
2017/05/23	19:48:05	294	16	241	315	454	7.5^*1	----	----	297	C2 C3 PHTX DST Java Movie
2017/05/23	20:00:05	278	13	615	615	620	0.3^*1	----	----	281	C2 C3 PHTX DST Java Movie	Only C2
2017/05/23	22:36:05	227	35	192	233	410	6.1^*1	5.8e+13	1.1e+28	224	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/23	23:36:05	90	26	164	251	858	30.0^*1	5.7e+13	7.7e+27	88	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/24	00:48:05	279	26	601	773	1447	78.5^*1	1.6e+14	2.8e+29	281	C2 C3 PHTX DST Java Movie	Only C2
2017/05/24	01:36:05	220	26	270	294	345	2.4^*1	3.5e+14	1.3e+29	221	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/24	04:36:05	230	22	212	229	288	1.9^*1	3.1e+13	6.9e+27	225	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/24	06:00:05	295	38	508	388	0	-45.2^*1	2.7e+14	3.5e+29	287	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/24	09:12:09	280	20	326	379	685	16.5^*1	1.0e+14	5.4e+28	281	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/24	23:57:41	306	63	259	285	594	14.1^*1	2.1e+14	7.1e+28	303	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/25	12:24:06	303	22	237	236	232	-0.1^*1	6.0e+13	1.7e+28	302	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/25	14:36:05	301	61	321	373	380	3.0^*1	6.7e+14	3.5e+29	301	C2 C3 PHTX DST Java Movie
2017/05/26	01:00:06	88	37	42	43	58	0.1^*1	2.9e+14	2.6e+27	89	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/27	00:24:05	39	14	296	300	359	1.8^*1	----	----	42	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/27	00:48:05	302	29	320	555	1616	122.1^*1	7.3e+13^*2	3.7e+28^*2	300	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/27	22:36:05	350	8	345	678	2029	173.0^*1	----	----	351	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/05/28	02:48:05	257	36	118	169	473	9.1^*1	4.0e+14	2.8e+28	253	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/28	05:24:05	255	33	235	324	471	8.2^*1	3.1e+14	8.4e+28	257	C2 C3 PHTX DST Java Movie
2017/05/29	05:36:05	262	17	193	206	299	2.4^*1	----	----	262	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/29	08:24:05	103	71	266	425	358	4.8	7.5e+15	2.7e+30	97	C2 C3 PHTX DST Java Movie
2017/05/29	20:12:05	264	41	191	168	0	-3.9^*1	4.1e+14	7.5e+28	259	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/30	16:36:05	81	30	195	217	380	4.7^*1	1.3e+14	2.4e+28	95	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/05/30	20:36:05	101	100	137	187	312	3.8^*1	2.7e+14	2.5e+28	95	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/31	09:12:10	258	52	212	218	256	1.0^*1	7.9e+14	1.8e+29	258	C2 C3 PHTX DST Java Movie	Poor Event
2017/05/31	23:12:11	85	37	71	86	326	4.4^*1	1.3e+14	3.2e+27	94	C2 C3 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).