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

2017/09/01 01:36:13 104 27 102 105 151 0.5^*1 2.2e+14 1.1e+28 104 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/01 02:00:05 276 59 87 0 0 -10.8^*1 1.2e+14 4.6e+27 286 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/01 10:48:05 237 43 409 476 547 7.8^*1 1.0e+14 8.7e+28 238 C2 C3 PHTX DST Java Movie Poor Event

2017/09/01 22:00:05 286 41 192 243 615 15.0^*1 3.4e+12 6.3e+26 285 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/02 15:48:05 269 94 705 761 744 5.1 5.8e+15 1.4e+31 276 C2 C3 PHTX DST Java Movie

2017/09/03 02:36:05 245 15 264 262 254 -0.3^*1 ---- ---- 234 C2 C3 PHTX DST Java Movie Poor Event

2017/09/03 09:36:05 91 34 166 136 0 -7.9^*1 6.6e+13 9.1e+27 92 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/04 00:48:06 191 29 288 361 869 29.7^*1 2.1e+13 8.7e+27 192 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/04 07:00:05 356 5 188 136 0 -36.4^*1 ---- ---- 356 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/04 19:00:05 233 >205 597 762 1216 52.9 4.9e+15^*2 8.7e+30^*2 240 C2 C3 PHTX DST Java Movie Uncertain Width; Partial Halo

2017/09/04 20:36:05 Halo 360 1418 1636 1611 47.5 7.6e+15^*2 7.6e+31^*2 184 C2 C3 PHTX DST Java Movie The first C2 appearance time was corrected on 2018/09/19.

2017/09/05 15:42:58 261 47 377 394 433 2.5^*1 4.4e+14 3.1e+29 256 C2 C3 PHTX DST Java Movie Poor Event

2017/09/05 17:36:05 216 129 474 538 569 6.4^*1 1.6e+15^*2 1.8e+30^*2 253 C2 C3 PHTX DST Java Movie Poor Event; Partial Halo

2017/09/06 07:12:05 256 64 113 156 407 6.8^*1 7.1e+14 4.6e+28 261 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/06 09:48:06 245 80 391 315 0 -13.8^*1 3.3e+15 2.5e+30 246 C2 C3 PHTX DST Java Movie

2017/09/06 12:24:05 Halo 360 1571 1569 1570 -0.3 2.9e+16^*2 3.6e+32^*2 201 C2 C3 PHTX DST Java Movie

2017/09/07 10:24:06 254 32 470 426 406 -4.0 1.5e+15 1.6e+30 244 C2 C3 PHTX DST Java Movie

2017/09/07 15:12:08 254 58 433 245 309 -9.9 1.2e+16 1.1e+31 246 C2 C3 PHTX DST Java Movie

2017/09/07 18:48:05 259 46 294 451 1104 49.7^*1 4.8e+14 2.1e+29 255 C2 C3 PHTX DST Java Movie Only C2

2017/09/07 23:36:05 261 37 464 501 527 4.0^*1 4.5e+13 4.9e+28 258 C2 C3 PHTX DST Java Movie

2017/09/08 00:48:05 31 35 230 300 652 17.5^*1 4.5e+12 1.2e+27 27 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/08 03:24:06 254 50 500 601 651 11.2^*1 2.0e+15 2.5e+30 254 C2 C3 PHTX DST Java Movie

2017/09/08 07:36:05 252 31 500 432 271 -10.6^*1 6.2e+14 7.7e+29 253 C2 C3 PHTX DST Java Movie

2017/09/08 22:24:05 59 20 481 709 1732 122.3^*1 4.7e+13^*2 5.5e+28^*2 63 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/09 06:12:05 262 43 269 236 0 -5.1^*1 3.0e+14 1.1e+29 265 C2 C3 PHTX DST Java Movie

2017/09/09 16:24:05 260 95 473 537 524 4.4 7.4e+15 8.3e+30 248 C2 C3 PHTX DST Java Movie

2017/09/09 20:48:05 55 7 144 88 0 -42.6^*1 ---- ---- 60 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/09 23:12:10 277 138 1019 877 955 -18.6 1.1e+16^*2 5.8e+31^*2 302 C2 C3 PHTX DST Java Movie Partial Halo

2017/09/10 16:00:05 Halo 360 3163 2558 2868 -232.0 4.8e+16^*2 2.4e+33^*2 262 C2 C3 PHTX DST Java Movie

2017/09/12 08:03:23 124 96 252 186 0 -4.7^*1 2.4e+15 7.5e+29 106 C2 C3 PHTX DST Java Movie

2017/09/12 14:48:05 259 78 286 359 608 13.9^*1 6.9e+14 2.8e+29 274 C2 C3 PHTX DST Java Movie

2017/09/12 19:12:05 271 113 476 592 651 12.2^*1 2.4e+15 2.7e+30 269 C2 C3 PHTX DST Java Movie

2017/09/12 20:12:06 102 89 256 273 323 1.9^*1 7.5e+13 2.4e+28 98 C2 C3 PHTX DST Java Movie Poor Event

2017/09/13 09:12:08 249 26 212 314 492 9.7^*1 3.5e+14 7.9e+28 251 C2 C3 PHTX DST Java Movie Poor Event

2017/09/13 09:12:08 109 43 228 291 593 13.6^*1 7.4e+13 1.9e+28 101 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/13 15:12:08 143 9 325 333 604 11.6^*1 ---- ---- 140 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2017/09/13 16:12:05 257 46 222 266 265 1.7^*1 1.9e+15 4.7e+29 262 C2 C3 PHTX DST Java Movie

2017/09/14 00:00:06 59 47 49 62 136 0.7^*1 3.4e+14 4.1e+27 60 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/14 02:00:05 246 13 314 302 284 -1.0^*1 ---- ---- 246 C2 C3 PHTX DST Java Movie Poor Event

2017/09/15 12:00:05 249 18 270 350 596 12.9^*1 ---- ---- 249 C2 C3 PHTX DST Java Movie Poor Event

2017/09/15 15:36:05 245 11 437 522 858 25.6^*1 ---- ---- 244 C2 C3 PHTX DST Java Movie Poor Event

2017/09/15 19:00:05 110 19 220 240 352 3.5^*1 ---- ---- 112 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/15 19:48:06 75 67 137 109 0 -3.5^*1 2.1e+14 2.0e+28 72 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/15 22:00:06 8 65 104 169 461 8.9^*1 1.9e+14 1.0e+28 2 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/16 01:25:42 50 9 252 215 0 -27.1^*1 ---- ---- 54 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/16 12:12:05 112 8 325 272 51 -6.1^*1 ---- ---- 112 C2 C3 PHTX DST Java Movie Poor Event

2017/09/16 12:12:05 87 222 335 198 0 -17.4^*1 2.8e+15^*2 1.6e+30^*2 49 C2 C3 PHTX DST Java Movie Partial Halo

2017/09/17 12:00:06 Halo 360 1385 1187 1308 -32.8 1.5e+16^*2 1.5e+32^*2 72 C2 C3 PHTX DST Java Movie

2017/09/17 14:24:05 124 230 759 638 631 -15.6 9.6e+15^*2 2.8e+31^*2 128 C2 C3 PHTX DST Java Movie Partial Halo

2017/09/18 15:36:05 99 24 284 264 225 -1.9^*1 1.7e+14 6.7e+28 98 C2 C3 PHTX DST Java Movie

2017/09/19 08:48:05 82 7 181 174 0 -1.7^*1 ---- ---- 87 C2 C3 PHTX DST Java Movie Very Poor Event

2017/09/19 10:00:05 108 10 310 493 918 37.3^*1 ---- ---- 109 C2 C3 PHTX DST Java Movie Very Poor Event

2017/09/20 03:24:05 86 9 180 219 444 8.0^*1 ---- ---- 90 C2 C3 PHTX DST Java Movie Very Poor Event

2017/09/20 17:36:06 21 11 341 355 581 9.5^*1 ---- ---- 24 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/20 20:12:05 262 25 212 142 0 -18.1^*1 9.0e+13 2.0e+28 257 C2 C3 PHTX DST Java Movie Only C2

2017/09/23 00:25:48 259 39 126 154 439 7.7^*1 8.4e+12 6.6e+26 255 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/23 17:24:05 95 87 150 169 299 3.0^*1 4.8e+14 5.4e+28 97 C2 C3 PHTX DST Java Movie Only C2

2017/09/24 11:36:05 7 39 456 476 661 10.3^*1 9.4e+13 9.8e+28 13 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/24 15:36:05 341 7 285 180 0 -74.6^*1 ---- ---- 339 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/25 06:36:05 106 37 184 171 148 -0.7^*1 2.2e+15 3.8e+29 101 C2 C3 PHTX DST Java Movie Poor Event

2017/09/25 12:36:06 265 49 115 199 258 2.9^*1 2.2e+15 1.4e+29 263 C2 C3 PHTX DST Java Movie Poor Event

2017/09/25 18:00:05 62 25 148 202 810 26.6^*1 1.5e+13 1.7e+27 66 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/25 22:12:05 112 104 182 140 0 -3.1^*1 1.1e+15 1.8e+29 104 C2 C3 PHTX DST Java Movie

2017/09/26 03:12:10 68 20 100 108 226 1.8^*1 3.4e+13 1.7e+27 66 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/28 05:48:05 63 27 181 203 575 12.5^*1 1.8e+13 2.9e+27 66 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/30 01:48:05 308 17 221 0 0 -56.7^*1 ---- ---- 299 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/09/30 04:36:05 306 23 192 350 765 24.5^*1 1.4e+15 2.5e+29 303 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/09/30 14:36:05 108 12 191 212 475 8.1^*1 ---- ---- 107 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
2017/09/01	01:36:13	104	27	102	105	151	0.5^*1	2.2e+14	1.1e+28	104	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/01	02:00:05	276	59	87	0	0	-10.8^*1	1.2e+14	4.6e+27	286	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/01	10:48:05	237	43	409	476	547	7.8^*1	1.0e+14	8.7e+28	238	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/01	22:00:05	286	41	192	243	615	15.0^*1	3.4e+12	6.3e+26	285	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/02	15:48:05	269	94	705	761	744	5.1	5.8e+15	1.4e+31	276	C2 C3 PHTX DST Java Movie
2017/09/03	02:36:05	245	15	264	262	254	-0.3^*1	----	----	234	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/03	09:36:05	91	34	166	136	0	-7.9^*1	6.6e+13	9.1e+27	92	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/04	00:48:06	191	29	288	361	869	29.7^*1	2.1e+13	8.7e+27	192	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/04	07:00:05	356	5	188	136	0	-36.4^*1	----	----	356	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/04	19:00:05	233	>205	597	762	1216	52.9	4.9e+15^*2	8.7e+30^*2	240	C2 C3 PHTX DST Java Movie	Uncertain Width; Partial Halo
2017/09/04	20:36:05	Halo	360	1418	1636	1611	47.5	7.6e+15^*2	7.6e+31^*2	184	C2 C3 PHTX DST Java Movie	The first C2 appearance time was corrected on 2018/09/19.
2017/09/05	15:42:58	261	47	377	394	433	2.5^*1	4.4e+14	3.1e+29	256	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/05	17:36:05	216	129	474	538	569	6.4^*1	1.6e+15^*2	1.8e+30^*2	253	C2 C3 PHTX DST Java Movie	Poor Event; Partial Halo
2017/09/06	07:12:05	256	64	113	156	407	6.8^*1	7.1e+14	4.6e+28	261	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/06	09:48:06	245	80	391	315	0	-13.8^*1	3.3e+15	2.5e+30	246	C2 C3 PHTX DST Java Movie
2017/09/06	12:24:05	Halo	360	1571	1569	1570	-0.3	2.9e+16^*2	3.6e+32^*2	201	C2 C3 PHTX DST Java Movie
2017/09/07	10:24:06	254	32	470	426	406	-4.0	1.5e+15	1.6e+30	244	C2 C3 PHTX DST Java Movie
2017/09/07	15:12:08	254	58	433	245	309	-9.9	1.2e+16	1.1e+31	246	C2 C3 PHTX DST Java Movie
2017/09/07	18:48:05	259	46	294	451	1104	49.7^*1	4.8e+14	2.1e+29	255	C2 C3 PHTX DST Java Movie	Only C2
2017/09/07	23:36:05	261	37	464	501	527	4.0^*1	4.5e+13	4.9e+28	258	C2 C3 PHTX DST Java Movie
2017/09/08	00:48:05	31	35	230	300	652	17.5^*1	4.5e+12	1.2e+27	27	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/08	03:24:06	254	50	500	601	651	11.2^*1	2.0e+15	2.5e+30	254	C2 C3 PHTX DST Java Movie
2017/09/08	07:36:05	252	31	500	432	271	-10.6^*1	6.2e+14	7.7e+29	253	C2 C3 PHTX DST Java Movie
2017/09/08	22:24:05	59	20	481	709	1732	122.3^*1	4.7e+13^*2	5.5e+28^*2	63	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/09	06:12:05	262	43	269	236	0	-5.1^*1	3.0e+14	1.1e+29	265	C2 C3 PHTX DST Java Movie
2017/09/09	16:24:05	260	95	473	537	524	4.4	7.4e+15	8.3e+30	248	C2 C3 PHTX DST Java Movie
2017/09/09	20:48:05	55	7	144	88	0	-42.6^*1	----	----	60	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/09	23:12:10	277	138	1019	877	955	-18.6	1.1e+16^*2	5.8e+31^*2	302	C2 C3 PHTX DST Java Movie	Partial Halo
2017/09/10	16:00:05	Halo	360	3163	2558	2868	-232.0	4.8e+16^*2	2.4e+33^*2	262	C2 C3 PHTX DST Java Movie
2017/09/12	08:03:23	124	96	252	186	0	-4.7^*1	2.4e+15	7.5e+29	106	C2 C3 PHTX DST Java Movie
2017/09/12	14:48:05	259	78	286	359	608	13.9^*1	6.9e+14	2.8e+29	274	C2 C3 PHTX DST Java Movie
2017/09/12	19:12:05	271	113	476	592	651	12.2^*1	2.4e+15	2.7e+30	269	C2 C3 PHTX DST Java Movie
2017/09/12	20:12:06	102	89	256	273	323	1.9^*1	7.5e+13	2.4e+28	98	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/13	09:12:08	249	26	212	314	492	9.7^*1	3.5e+14	7.9e+28	251	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/13	09:12:08	109	43	228	291	593	13.6^*1	7.4e+13	1.9e+28	101	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/13	15:12:08	143	9	325	333	604	11.6^*1	----	----	140	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2017/09/13	16:12:05	257	46	222	266	265	1.7^*1	1.9e+15	4.7e+29	262	C2 C3 PHTX DST Java Movie
2017/09/14	00:00:06	59	47	49	62	136	0.7^*1	3.4e+14	4.1e+27	60	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/14	02:00:05	246	13	314	302	284	-1.0^*1	----	----	246	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/15	12:00:05	249	18	270	350	596	12.9^*1	----	----	249	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/15	15:36:05	245	11	437	522	858	25.6^*1	----	----	244	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/15	19:00:05	110	19	220	240	352	3.5^*1	----	----	112	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/15	19:48:06	75	67	137	109	0	-3.5^*1	2.1e+14	2.0e+28	72	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/15	22:00:06	8	65	104	169	461	8.9^*1	1.9e+14	1.0e+28	2	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/16	01:25:42	50	9	252	215	0	-27.1^*1	----	----	54	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/16	12:12:05	112	8	325	272	51	-6.1^*1	----	----	112	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/16	12:12:05	87	222	335	198	0	-17.4^*1	2.8e+15^*2	1.6e+30^*2	49	C2 C3 PHTX DST Java Movie	Partial Halo
2017/09/17	12:00:06	Halo	360	1385	1187	1308	-32.8	1.5e+16^*2	1.5e+32^*2	72	C2 C3 PHTX DST Java Movie
2017/09/17	14:24:05	124	230	759	638	631	-15.6	9.6e+15^*2	2.8e+31^*2	128	C2 C3 PHTX DST Java Movie	Partial Halo
2017/09/18	15:36:05	99	24	284	264	225	-1.9^*1	1.7e+14	6.7e+28	98	C2 C3 PHTX DST Java Movie
2017/09/19	08:48:05	82	7	181	174	0	-1.7^*1	----	----	87	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/09/19	10:00:05	108	10	310	493	918	37.3^*1	----	----	109	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/09/20	03:24:05	86	9	180	219	444	8.0^*1	----	----	90	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/09/20	17:36:06	21	11	341	355	581	9.5^*1	----	----	24	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/20	20:12:05	262	25	212	142	0	-18.1^*1	9.0e+13	2.0e+28	257	C2 C3 PHTX DST Java Movie	Only C2
2017/09/23	00:25:48	259	39	126	154	439	7.7^*1	8.4e+12	6.6e+26	255	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/23	17:24:05	95	87	150	169	299	3.0^*1	4.8e+14	5.4e+28	97	C2 C3 PHTX DST Java Movie	Only C2
2017/09/24	11:36:05	7	39	456	476	661	10.3^*1	9.4e+13	9.8e+28	13	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/24	15:36:05	341	7	285	180	0	-74.6^*1	----	----	339	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/25	06:36:05	106	37	184	171	148	-0.7^*1	2.2e+15	3.8e+29	101	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/25	12:36:06	265	49	115	199	258	2.9^*1	2.2e+15	1.4e+29	263	C2 C3 PHTX DST Java Movie	Poor Event
2017/09/25	18:00:05	62	25	148	202	810	26.6^*1	1.5e+13	1.7e+27	66	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/25	22:12:05	112	104	182	140	0	-3.1^*1	1.1e+15	1.8e+29	104	C2 C3 PHTX DST Java Movie
2017/09/26	03:12:10	68	20	100	108	226	1.8^*1	3.4e+13	1.7e+27	66	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/28	05:48:05	63	27	181	203	575	12.5^*1	1.8e+13	2.9e+27	66	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/30	01:48:05	308	17	221	0	0	-56.7^*1	----	----	299	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/09/30	04:36:05	306	23	192	350	765	24.5^*1	1.4e+15	2.5e+29	303	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/09/30	14:36:05	108	12	191	212	475	8.1^*1	----	----	107	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).