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

2020/08/01 16:12:05 72 13 170 163 125 -0.6^*1 ---- ---- 82 C2 C3 PHTX DST Java Movie Poor Event

2020/08/02 00:48:05 256 55 182 134 0 -17.4^*1 8.6e+12 1.4e+27 258 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/03 01:48:05 257 38 107 92 0 -4.0^*1 1.0e+13 5.9e+26 260 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/03 22:24:05 84 46 141 118 0 -3.2^*1 9.3e+13 9.2e+27 85 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/04 00:00:05 263 48 261 397 509 10.0^*1 6.1e+14 2.1e+29 263 C2 C3 PHTX DST Java Movie Poor Event

2020/08/04 20:00:05 265 42 269 251 0 -5.3^*1 2.9e+13 1.0e+28 258 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/05 14:24:05 80 39 121 193 495 10.1^*1 1.4e+14 1.0e+28 86 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/06 02:24:05 86 40 164 77 0 -25.2^*1 5.2e+13 6.9e+27 72 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/06 02:48:05 266 34 283 382 884 31.5^*1 1.7e+13 6.8e+27 266 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/06 12:12:05 41 152 156 115 0 -4.6^*1 1.7e+14^*2 2.1e+28^*2 50 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2; Partial Halo

2020/08/07 10:48:05 72 22 266 131 0 -39.6^*1 9.0e+12 3.2e+27 76 C2 C3 PHTX DST Java Movie Poor Event

2020/08/07 12:48:05 288 12 334 568 1734 126.0^*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/07 15:48:05 84 16 244 296 307 2.6^*1 ---- ---- 81 C2 C3 PHTX DST Java Movie Poor Event

2020/08/08 16:48:05 247 16 250 274 335 2.8^*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Poor Event

2020/08/08 20:57:31 72 12 198 214 269 1.8^*1 ---- ---- 72 C2 C3 PHTX DST Java Movie Very Poor Event

2020/08/09 01:25:40 116 14 705 544 0 -159.7^*1 ---- ---- 108 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/09 04:00:06 86 33 142 107 0 -7.6^*1 8.0e+13 8.1e+27 87 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/09 07:00:05 250 50 112 127 270 2.9^*1 6.5e+13 4.1e+27 262 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/09 17:36:05 253 48 57 60 91 0.2^*1 5.3e+14 8.6e+27 257 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/10 08:12:06 249 45 178 215 234 1.7^*1 3.2e+14 5.0e+28 252 C2 C3 PHTX DST Java Movie Very Poor Event

2020/08/12 04:00:05 79 35 146 101 0 -24.9^*1 1.2e+13 1.3e+27 85 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/13 10:36:05 269 39 146 116 0 -9.3^*1 1.4e+13 1.5e+27 269 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/13 17:24:05 78 43 249 253 313 1.6^*1 2.4e+13 7.4e+27 85 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/14 04:17:42 108 27 161 138 0 -10.1^*1 1.1e+14 1.4e+28 103 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/14 06:36:05 111 23 136 165 352 4.7^*1 3.5e+14 3.2e+28 102 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/14 11:24:05 76 24 190 223 571 12.3^*1 8.0e+12 1.5e+27 65 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/15 07:12:06 262 58 298 264 172 -3.3 8.5e+14 3.8e+29 270 C2 C3 PHTX DST Java Movie

2020/08/15 12:48:05 81 49 95 56 0 -9.8^*1 2.3e+13 1.0e+27 81 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/15 15:24:05 253 21 108 170 293 3.8^*1 5.2e+11 3.0e+25 261 C2 C3 PHTX DST Java Movie Poor Event

2020/08/16 00:00:06 93 81 361 558 496 9.1^*1 3.2e+15 2.1e+30 88 C2 C3 PHTX DST Java Movie

2020/08/16 05:48:05 260 61 300 261 0 -6.2^*1 1.4e+14 6.5e+28 268 C2 C3 PHTX DST Java Movie

2020/08/16 18:12:07 104 123 437 595 612 12.5 1.7e+15^*2 1.7e+30^*2 99 C2 C3 PHTX DST Java Movie Partial Halo

2020/08/16 22:36:05 174 12 679 658 0 -29.7^*1 ---- ---- 171 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2020/08/17 01:25:40 268 48 412 344 0 -33.7^*1 7.9e+13 6.7e+28 274 C2 C3 PHTX DST Java Movie Only C2

2020/08/17 08:00:05 89 19 245 254 300 1.4^*1 ---- ---- 96 C2 C3 PHTX DST Java Movie Very Poor Event

2020/08/17 23:24:05 279 66 141 171 229 1.6^*1 2.1e+14 2.1e+28 277 C2 C3 PHTX DST Java Movie

2020/08/18 03:24:05 96 28 169 146 0 -5.5^*1 5.4e+13 7.7e+27 93 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/18 06:00:05 99 33 120 72 0 -24.6^*1 2.8e+13 2.0e+27 98 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/18 19:12:06 258 31 160 145 0 -2.0^*1 2.8e+14 3.6e+28 265 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/19 11:24:05 97 52 33 32 18 -0.0^*1 6.6e+14 3.6e+27 92 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/20 00:24:05 269 10 185 158 0 -5.9^*1 ---- ---- 262 C2 C3 PHTX DST Java Movie Very Poor Event

2020/08/20 03:12:11 81 23 251 232 0 -5.4^*1 1.9e+13 6.0e+27 84 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/20 06:36:05 272 22 258 284 385 4.0^*1 3.8e+12 1.3e+27 270 C2 C3 PHTX DST Java Movie Poor Event

2020/08/20 15:48:05 63 13 325 108 0 -72.5^*1 ---- ---- 76 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/21 17:08:47 275 26 218 213 140 -1.2^*1 1.7e+13 4.0e+27 268 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/21 20:40:09 112 10 187 221 540 11.1^*1 ---- ---- 108 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/21 23:12:11 50 11 349 306 0 -59.4^*1 ---- ---- 51 C2 C3 PHTX DST Java Movie Poor Event; Only 3 points; Only C2

2020/08/21 23:36:07 271 29 233 211 0 -4.5^*1 2.1e+13 5.8e+27 269 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/22 01:48:06 103 30 225 327 448 8.6^*1 4.3e+11 1.1e+26 97 C2 C3 PHTX DST Java Movie Poor Event

2020/08/22 16:48:06 107 31 197 412 471 10.2^*1 3.6e+13 6.9e+27 98 C2 C3 PHTX DST Java Movie Poor Event

2020/08/22 17:00:06 74 16 200 271 666 17.7^*1 ---- ---- 69 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/22 23:12:22 269 26 169 200 326 4.2^*1 2.7e+14 3.9e+28 271 C2 C3 PHTX DST Java Movie Poor Event

2020/08/23 14:24:05 168 16 408 580 1596 103.9^*1 ---- ---- 164 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2020/08/24 07:00:05 105 11 290 384 584 13.8^*1 ---- ---- 100 C2 C3 PHTX DST Java Movie Poor Event

2020/08/24 12:00:05 76 44 57 0 0 -7.2^*1 3.4e+14 5.5e+27 80 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/24 22:24:05 273 17 211 248 364 4.3^*1 ---- ---- 271 C2 C3 PHTX DST Java Movie Poor Event

2020/08/27 00:48:05 273 69 123 175 229 2.0^*1 1.2e+15 8.8e+28 279 C2 C3 PHTX DST Java Movie Poor Event

2020/08/27 10:36:05 89 87 241 348 311 3.1 6.0e+15 1.7e+30 82 C2 C3 PHTX DST Java Movie

2020/08/28 03:47:14 277 11 284 419 607 15.3^*1 ---- ---- 281 C2 C3 PHTX DST Java Movie Very Poor Event

2020/08/28 14:36:05 280 11 222 258 358 4.6^*1 ---- ---- 279 C2 C3 PHTX DST Java Movie Very Poor Event

2020/08/29 00:00:05 86 16 281 339 478 8.4^*1 ---- ---- 89 C2 C3 PHTX DST Java Movie Poor Event

2020/08/29 10:48:05 286 11 189 220 531 10.6^*1 ---- ---- 280 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2020/08/29 15:36:05 284 11 196 163 0 -4.8^*1 ---- ---- 282 C2 C3 PHTX DST Java Movie Poor Event

2020/08/29 19:48:05 285 10 218 204 79 -2.0^*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Poor Event

2020/08/30 01:25:44 258 42 117 213 286 3.5^*1 4.6e+14 3.1e+28 250 C2 C3 PHTX DST Java Movie Poor Event

2020/08/31 02:12:05 74 53 213 182 0 -5.2^*1 5.2e+14 1.2e+29 82 C2 C3 PHTX DST Java Movie Poor Event

2020/08/31 03:36:06 78 91 63 58 0 -0.2^*1 4.3e+14 8.5e+27 82 C2 C3 PHTX DST Java Movie 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
2020/08/01	16:12:05	72	13	170	163	125	-0.6^*1	----	----	82	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/02	00:48:05	256	55	182	134	0	-17.4^*1	8.6e+12	1.4e+27	258	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/03	01:48:05	257	38	107	92	0	-4.0^*1	1.0e+13	5.9e+26	260	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/03	22:24:05	84	46	141	118	0	-3.2^*1	9.3e+13	9.2e+27	85	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/04	00:00:05	263	48	261	397	509	10.0^*1	6.1e+14	2.1e+29	263	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/04	20:00:05	265	42	269	251	0	-5.3^*1	2.9e+13	1.0e+28	258	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/05	14:24:05	80	39	121	193	495	10.1^*1	1.4e+14	1.0e+28	86	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/06	02:24:05	86	40	164	77	0	-25.2^*1	5.2e+13	6.9e+27	72	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/06	02:48:05	266	34	283	382	884	31.5^*1	1.7e+13	6.8e+27	266	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/06	12:12:05	41	152	156	115	0	-4.6^*1	1.7e+14^*2	2.1e+28^*2	50	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2; Partial Halo
2020/08/07	10:48:05	72	22	266	131	0	-39.6^*1	9.0e+12	3.2e+27	76	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/07	12:48:05	288	12	334	568	1734	126.0^*1	----	----	282	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/07	15:48:05	84	16	244	296	307	2.6^*1	----	----	81	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/08	16:48:05	247	16	250	274	335	2.8^*1	----	----	252	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/08	20:57:31	72	12	198	214	269	1.8^*1	----	----	72	C2 C3 PHTX DST Java Movie	Very Poor Event
2020/08/09	01:25:40	116	14	705	544	0	-159.7^*1	----	----	108	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/09	04:00:06	86	33	142	107	0	-7.6^*1	8.0e+13	8.1e+27	87	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/09	07:00:05	250	50	112	127	270	2.9^*1	6.5e+13	4.1e+27	262	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/09	17:36:05	253	48	57	60	91	0.2^*1	5.3e+14	8.6e+27	257	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/10	08:12:06	249	45	178	215	234	1.7^*1	3.2e+14	5.0e+28	252	C2 C3 PHTX DST Java Movie	Very Poor Event
2020/08/12	04:00:05	79	35	146	101	0	-24.9^*1	1.2e+13	1.3e+27	85	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/13	10:36:05	269	39	146	116	0	-9.3^*1	1.4e+13	1.5e+27	269	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/13	17:24:05	78	43	249	253	313	1.6^*1	2.4e+13	7.4e+27	85	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/14	04:17:42	108	27	161	138	0	-10.1^*1	1.1e+14	1.4e+28	103	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/14	06:36:05	111	23	136	165	352	4.7^*1	3.5e+14	3.2e+28	102	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/14	11:24:05	76	24	190	223	571	12.3^*1	8.0e+12	1.5e+27	65	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/15	07:12:06	262	58	298	264	172	-3.3	8.5e+14	3.8e+29	270	C2 C3 PHTX DST Java Movie
2020/08/15	12:48:05	81	49	95	56	0	-9.8^*1	2.3e+13	1.0e+27	81	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/15	15:24:05	253	21	108	170	293	3.8^*1	5.2e+11	3.0e+25	261	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/16	00:00:06	93	81	361	558	496	9.1^*1	3.2e+15	2.1e+30	88	C2 C3 PHTX DST Java Movie
2020/08/16	05:48:05	260	61	300	261	0	-6.2^*1	1.4e+14	6.5e+28	268	C2 C3 PHTX DST Java Movie
2020/08/16	18:12:07	104	123	437	595	612	12.5	1.7e+15^*2	1.7e+30^*2	99	C2 C3 PHTX DST Java Movie	Partial Halo
2020/08/16	22:36:05	174	12	679	658	0	-29.7^*1	----	----	171	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2020/08/17	01:25:40	268	48	412	344	0	-33.7^*1	7.9e+13	6.7e+28	274	C2 C3 PHTX DST Java Movie	Only C2
2020/08/17	08:00:05	89	19	245	254	300	1.4^*1	----	----	96	C2 C3 PHTX DST Java Movie	Very Poor Event
2020/08/17	23:24:05	279	66	141	171	229	1.6^*1	2.1e+14	2.1e+28	277	C2 C3 PHTX DST Java Movie
2020/08/18	03:24:05	96	28	169	146	0	-5.5^*1	5.4e+13	7.7e+27	93	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/18	06:00:05	99	33	120	72	0	-24.6^*1	2.8e+13	2.0e+27	98	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/18	19:12:06	258	31	160	145	0	-2.0^*1	2.8e+14	3.6e+28	265	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/19	11:24:05	97	52	33	32	18	-0.0^*1	6.6e+14	3.6e+27	92	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/20	00:24:05	269	10	185	158	0	-5.9^*1	----	----	262	C2 C3 PHTX DST Java Movie	Very Poor Event
2020/08/20	03:12:11	81	23	251	232	0	-5.4^*1	1.9e+13	6.0e+27	84	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/20	06:36:05	272	22	258	284	385	4.0^*1	3.8e+12	1.3e+27	270	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/20	15:48:05	63	13	325	108	0	-72.5^*1	----	----	76	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/21	17:08:47	275	26	218	213	140	-1.2^*1	1.7e+13	4.0e+27	268	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/21	20:40:09	112	10	187	221	540	11.1^*1	----	----	108	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/21	23:12:11	50	11	349	306	0	-59.4^*1	----	----	51	C2 C3 PHTX DST Java Movie	Poor Event; Only 3 points; Only C2
2020/08/21	23:36:07	271	29	233	211	0	-4.5^*1	2.1e+13	5.8e+27	269	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/22	01:48:06	103	30	225	327	448	8.6^*1	4.3e+11	1.1e+26	97	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/22	16:48:06	107	31	197	412	471	10.2^*1	3.6e+13	6.9e+27	98	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/22	17:00:06	74	16	200	271	666	17.7^*1	----	----	69	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/22	23:12:22	269	26	169	200	326	4.2^*1	2.7e+14	3.9e+28	271	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/23	14:24:05	168	16	408	580	1596	103.9^*1	----	----	164	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2020/08/24	07:00:05	105	11	290	384	584	13.8^*1	----	----	100	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/24	12:00:05	76	44	57	0	0	-7.2^*1	3.4e+14	5.5e+27	80	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/24	22:24:05	273	17	211	248	364	4.3^*1	----	----	271	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/27	00:48:05	273	69	123	175	229	2.0^*1	1.2e+15	8.8e+28	279	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/27	10:36:05	89	87	241	348	311	3.1	6.0e+15	1.7e+30	82	C2 C3 PHTX DST Java Movie
2020/08/28	03:47:14	277	11	284	419	607	15.3^*1	----	----	281	C2 C3 PHTX DST Java Movie	Very Poor Event
2020/08/28	14:36:05	280	11	222	258	358	4.6^*1	----	----	279	C2 C3 PHTX DST Java Movie	Very Poor Event
2020/08/29	00:00:05	86	16	281	339	478	8.4^*1	----	----	89	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/29	10:48:05	286	11	189	220	531	10.6^*1	----	----	280	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2020/08/29	15:36:05	284	11	196	163	0	-4.8^*1	----	----	282	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/29	19:48:05	285	10	218	204	79	-2.0^*1	----	----	272	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/30	01:25:44	258	42	117	213	286	3.5^*1	4.6e+14	3.1e+28	250	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/31	02:12:05	74	53	213	182	0	-5.2^*1	5.2e+14	1.2e+29	82	C2 C3 PHTX DST Java Movie	Poor Event
2020/08/31	03:36:06	78	91	63	58	0	-0.2^*1	4.3e+14	8.5e+27	82	C2 C3 PHTX DST Java Movie	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).