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

2017/12/01 02:48:05 301 16 316 308 277 -1.3^*1 ---- ---- 297 C2 C3 PHTX DST Java Movie Poor Event

2017/12/01 07:36:05 305 33 489 619 856 26.6^*1 1.3e+14 1.5e+29 298 C2 C3 PHTX DST Java Movie Poor Event

2017/12/01 08:48:23 102 52 82 114 628 16.3^*1 1.5e+13 5.1e+26 102 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/01 11:00:06 351 9 305 483 2019 167.7^*1 ---- ---- 352 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/01 14:36:05 282 21 741 609 0 -50.7^*1 5.3e+13 1.4e+29 277 C2 C3 PHTX DST Java Movie

2017/12/02 02:12:05 354 9 375 449 1051 41.6^*1 ---- ---- 353 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/03 02:12:05 304 11 268 311 420 6.2^*1 ---- ---- 297 C2 C3 PHTX DST Java Movie Poor Event

2017/12/03 07:48:05 271 9 229 285 921 33.6^*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/03 22:24:05 57 13 316 343 651 14.0^*1 ---- ---- 64 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/04 21:36:05 278 84 436 468 596 7.8^*1 2.8e+14 2.6e+29 269 C2 C3 PHTX DST Java Movie

2017/12/05 12:00:05 284 88 381 423 555 8.2^*1 4.4e+14 3.2e+29 276 C2 C3 PHTX DST Java Movie

2017/12/05 22:24:05 74 22 363 647 1037 44.2^*1 1.5e+13 1.0e+28 78 C2 C3 PHTX DST Java Movie Poor Event

2017/12/06 02:48:06 75 27 294 531 1387 80.2^*1 1.1e+13 4.8e+27 81 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/06 13:48:06 239 20 178 0 0 -47.2^*1 3.8e+12 6.0e+26 240 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/06 16:00:06 235 25 378 707 1771 132.3^*1 2.3e+13 1.6e+28 239 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/06 21:36:05 65 13 327 419 908 31.8^*1 ---- ---- 71 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/07 23:48:05 300 78 168 218 393 5.8^*1 1.9e+14 2.7e+28 299 C2 C3 PHTX DST Java Movie

2017/12/08 16:36:05 261 19 72 71 51 -0.1^*1 ---- ---- 260 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/09 09:12:08 261 17 247 275 437 6.0^*1 ---- ---- 260 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/09 20:24:05 260 14 269 291 388 3.9^*1 ---- ---- 258 C2 C3 PHTX DST Java Movie Poor Event

2017/12/09 21:48:05 312 8 250 156 0 -59.4^*1 ---- ---- 310 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/13 00:48:05 62 33 128 183 412 6.9^*1 4.5e+13 3.7e+27 63 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/14 07:12:05 114 41 149 159 246 1.7^*1 8.6e+13 9.6e+27 109 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/14 15:24:05 86 10 280 286 350 1.9^*1 ---- ---- 84 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/14 22:24:06 63 46 195 131 0 -9.6^*1 1.5e+14 2.9e+28 80 C2 C3 PHTX DST Java Movie Poor Event

2017/12/15 10:36:05 259 79 192 347 348 4.9 2.2e+15 4.1e+29 254 C2 C3 PHTX DST Java Movie

2017/12/15 14:24:05 119 94 197 174 138 -1.2^*1 9.0e+14 1.8e+29 111 C2 C3 PHTX DST Java Movie

2017/12/16 09:12:08 268 10 216 321 566 13.3^*1 ---- ---- 269 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/16 12:36:05 82 12 100 169 931 35.4^*1 ---- ---- 85 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/17 09:12:09 75 39 129 9 0 -9.6^*1 2.9e+13 2.4e+27 86 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/18 09:24:05 117 9 635 904 2415 248.4^*1 ---- ---- 113 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/18 12:00:05 251 24 198 117 0 -14.0^*1 6.2e+13 1.2e+28 250 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/18 19:01:38 259 10 285 370 709 20.8^*1 ---- ---- 256 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/19 00:36:05 67 64 207 380 724 21.5^*1 1.8e+14 3.9e+28 69 C2 C3 PHTX DST Java Movie Poor Event

2017/12/21 02:24:07 54 79 63 88 176 1.3^*1 2.5e+14 4.9e+27 49 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/21 07:00:05 270 56 465 455 449 -0.9^*1 4.3e+14 4.6e+29 270 C2 C3 PHTX DST Java Movie

2017/12/21 22:00:05 69 35 215 216 235 0.4^*1 9.5e+12 2.2e+27 82 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/21 22:24:05 335 11 279 265 0 -7.0^*1 ---- ---- 333 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/21 22:36:05 284 23 229 282 388 5.0^*1 2.3e+14 6.0e+28 281 C2 C3 PHTX DST Java Movie Poor Event

2017/12/22 02:48:05 232 112 189 197 222 0.7^*1 2.1e+14 3.7e+28 229 C2 C3 PHTX DST Java Movie

2017/12/23 20:24:07 92 32 81 87 154 0.7^*1 3.5e+13 1.2e+27 94 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/25 22:24:05 91 18 124 158 379 6.1^*1 ---- ---- 93 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/26 19:00:05 300 18 223 259 324 3.6^*1 ---- ---- 297 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/27 16:36:05 301 14 408 478 537 7.6^*1 ---- ---- 297 C2 C3 PHTX DST Java Movie Poor Event

2017/12/27 20:57:30 299 25 222 293 464 8.4^*1 5.9e+13 1.5e+28 298 C2 C3 PHTX DST Java Movie Very Poor Event

2017/12/28 00:12:05 262 11 230 403 1217 60.9^*1 ---- ---- 258 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/28 01:48:05 304 11 420 507 556 8.7^*1 ---- ---- 297 C2 C3 PHTX DST Java Movie Poor Event

2017/12/28 20:12:05 94 29 158 26 0 -25.8^*1 2.4e+13 2.9e+27 100 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2017/12/28 23:12:05 95 44 419 356 128 -9.5^*1 2.3e+14 2.0e+29 98 C2 C3 PHTX DST Java Movie

2017/12/29 03:47:17 96 38 221 170 0 -18.3^*1 3.6e+12 8.8e+26 99 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2017/12/29 07:12:06 48 15 474 675 2499 279.0^*1 ---- ---- 53 C2 C3 PHTX DST Java Movie Poor Event; Only 3 points; Only C2

2017/12/29 12:48:06 298 30 124 150 334 4.2^*1 1.5e+13 1.1e+27 296 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
2017/12/01	02:48:05	301	16	316	308	277	-1.3^*1	----	----	297	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/01	07:36:05	305	33	489	619	856	26.6^*1	1.3e+14	1.5e+29	298	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/01	08:48:23	102	52	82	114	628	16.3^*1	1.5e+13	5.1e+26	102	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/01	11:00:06	351	9	305	483	2019	167.7^*1	----	----	352	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/01	14:36:05	282	21	741	609	0	-50.7^*1	5.3e+13	1.4e+29	277	C2 C3 PHTX DST Java Movie
2017/12/02	02:12:05	354	9	375	449	1051	41.6^*1	----	----	353	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/03	02:12:05	304	11	268	311	420	6.2^*1	----	----	297	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/03	07:48:05	271	9	229	285	921	33.6^*1	----	----	272	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/03	22:24:05	57	13	316	343	651	14.0^*1	----	----	64	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/04	21:36:05	278	84	436	468	596	7.8^*1	2.8e+14	2.6e+29	269	C2 C3 PHTX DST Java Movie
2017/12/05	12:00:05	284	88	381	423	555	8.2^*1	4.4e+14	3.2e+29	276	C2 C3 PHTX DST Java Movie
2017/12/05	22:24:05	74	22	363	647	1037	44.2^*1	1.5e+13	1.0e+28	78	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/06	02:48:06	75	27	294	531	1387	80.2^*1	1.1e+13	4.8e+27	81	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/06	13:48:06	239	20	178	0	0	-47.2^*1	3.8e+12	6.0e+26	240	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/06	16:00:06	235	25	378	707	1771	132.3^*1	2.3e+13	1.6e+28	239	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/06	21:36:05	65	13	327	419	908	31.8^*1	----	----	71	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/07	23:48:05	300	78	168	218	393	5.8^*1	1.9e+14	2.7e+28	299	C2 C3 PHTX DST Java Movie
2017/12/08	16:36:05	261	19	72	71	51	-0.1^*1	----	----	260	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/09	09:12:08	261	17	247	275	437	6.0^*1	----	----	260	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/09	20:24:05	260	14	269	291	388	3.9^*1	----	----	258	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/09	21:48:05	312	8	250	156	0	-59.4^*1	----	----	310	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/13	00:48:05	62	33	128	183	412	6.9^*1	4.5e+13	3.7e+27	63	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/14	07:12:05	114	41	149	159	246	1.7^*1	8.6e+13	9.6e+27	109	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/14	15:24:05	86	10	280	286	350	1.9^*1	----	----	84	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/14	22:24:06	63	46	195	131	0	-9.6^*1	1.5e+14	2.9e+28	80	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/15	10:36:05	259	79	192	347	348	4.9	2.2e+15	4.1e+29	254	C2 C3 PHTX DST Java Movie
2017/12/15	14:24:05	119	94	197	174	138	-1.2^*1	9.0e+14	1.8e+29	111	C2 C3 PHTX DST Java Movie
2017/12/16	09:12:08	268	10	216	321	566	13.3^*1	----	----	269	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/16	12:36:05	82	12	100	169	931	35.4^*1	----	----	85	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/17	09:12:09	75	39	129	9	0	-9.6^*1	2.9e+13	2.4e+27	86	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/18	09:24:05	117	9	635	904	2415	248.4^*1	----	----	113	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/18	12:00:05	251	24	198	117	0	-14.0^*1	6.2e+13	1.2e+28	250	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/18	19:01:38	259	10	285	370	709	20.8^*1	----	----	256	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/19	00:36:05	67	64	207	380	724	21.5^*1	1.8e+14	3.9e+28	69	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/21	02:24:07	54	79	63	88	176	1.3^*1	2.5e+14	4.9e+27	49	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/21	07:00:05	270	56	465	455	449	-0.9^*1	4.3e+14	4.6e+29	270	C2 C3 PHTX DST Java Movie
2017/12/21	22:00:05	69	35	215	216	235	0.4^*1	9.5e+12	2.2e+27	82	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/21	22:24:05	335	11	279	265	0	-7.0^*1	----	----	333	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/21	22:36:05	284	23	229	282	388	5.0^*1	2.3e+14	6.0e+28	281	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/22	02:48:05	232	112	189	197	222	0.7^*1	2.1e+14	3.7e+28	229	C2 C3 PHTX DST Java Movie
2017/12/23	20:24:07	92	32	81	87	154	0.7^*1	3.5e+13	1.2e+27	94	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/25	22:24:05	91	18	124	158	379	6.1^*1	----	----	93	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/26	19:00:05	300	18	223	259	324	3.6^*1	----	----	297	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/27	16:36:05	301	14	408	478	537	7.6^*1	----	----	297	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/27	20:57:30	299	25	222	293	464	8.4^*1	5.9e+13	1.5e+28	298	C2 C3 PHTX DST Java Movie	Very Poor Event
2017/12/28	00:12:05	262	11	230	403	1217	60.9^*1	----	----	258	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/28	01:48:05	304	11	420	507	556	8.7^*1	----	----	297	C2 C3 PHTX DST Java Movie	Poor Event
2017/12/28	20:12:05	94	29	158	26	0	-25.8^*1	2.4e+13	2.9e+27	100	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2017/12/28	23:12:05	95	44	419	356	128	-9.5^*1	2.3e+14	2.0e+29	98	C2 C3 PHTX DST Java Movie
2017/12/29	03:47:17	96	38	221	170	0	-18.3^*1	3.6e+12	8.8e+26	99	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2017/12/29	07:12:06	48	15	474	675	2499	279.0^*1	----	----	53	C2 C3 PHTX DST Java Movie	Poor Event; Only 3 points; Only C2
2017/12/29	12:48:06	298	30	124	150	334	4.2^*1	1.5e+13	1.1e+27	296	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).