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

2009/05/01 06:26:04 254 31 279 356 340 3.2^*1 5.0e+12 1.9e+27 257 C2 C3 195 PHTX DST Java Movie

2009/05/01 12:06:04 11 7 265 290 506 8.3^*1 ---- ---- 14 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/02 12:25:48 259 26 253 348 359 4.9^*1 4.7e+14 1.5e+29 266 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/03 08:00:03 301 14 338 293 169 -5.2^*1 ---- ---- 288 C2 C3 PHTX DST Java Movie Poor Event

2009/05/04 14:12:03 89 38 184 135 0 -6.9^*1 4.9e+13 8.3e+27 87 C2 C3 PHTX DST Java Movie Very Poor Event

2009/05/05 23:12:03 80 52 372 338 330 -2.2 1.6e+15 1.1e+30 75 C2 C3 PHTX DST Java Movie

2009/05/06 11:12:03 85 53 336 327 313 -0.8^*1 1.1e+14 6.5e+28 72 C2 C3 PHTX DST Java Movie

2009/05/06 12:12:03 68 23 203 218 334 3.1^*1 2.3e+14 4.7e+28 71 C2 C3 PHTX DST Java Movie Only C2

2009/05/06 23:12:03 223 4 315 231 0 -61.4^*1 ---- ---- 229 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/07 00:36:03 70 8 123 144 359 4.9^*1 ---- ---- 70 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/07 05:36:03 253 9 230 351 1273 66.2^*1 ---- ---- 256 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/07 09:48:04 102 9 434 557 1470 86.4^*1 ---- ---- 101 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/08 02:12:03 76 29 260 323 1133 50.7^*1 3.8e+13 1.3e+28 68 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/05/09 04:26:07 65 8 263 193 0 -12.2^*1 ---- ---- 72 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/10 11:26:03 297 7 467 317 0 -63.4^*1 ---- ---- 293 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/05/10 12:06:03 180 7 328 448 1283 67.5^*1 ---- ---- 178 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/11 12:50:04 267 54 54 41 0 -1.7^*1 7.8e+13 1.1e+27 266 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/13 05:42:03 103 60 275 254 305 -2.6^*1 2.7e+14 1.0e+29 102 C2 C3 195 PHTX DST Java Movie due to data gap this CME was observed only in C3; Poor Event; Only C3

2009/05/13 11:54:04 78 54 185 316 324 4.1^*1 6.1e+14 1.0e+29 84 C2 C3 195 PHTX DST Java Movie

2009/05/13 18:30:03 219 11 541 410 0 -73.8^*1 ---- ---- 223 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/14 18:54:04 82 13 223 197 170 -1.4^*1 ---- ---- 81 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/15 08:30:03 14 9 401 380 0 -11.9^*1 ---- ---- 18 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/15 10:30:19 69 24 273 248 248 -1.1^*1 3.8e+14 1.4e+29 76 C2 C3 195 PHTX DST Java Movie

2009/05/15 12:06:05 14 10 549 279 0 -66.0^*1 ---- ---- 19 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/16 02:30:03 248 7 312 364 505 7.9^*1 ---- ---- 253 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/05/16 13:31:39 142 9 237 216 0 -12.4^*1 ---- ---- 135 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/18 19:31:37 340 7 167 119 0 -21.3^*1 ---- ---- 336 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/20 13:31:39 272 9 141 270 270 3.1^*1 ---- ---- 273 C2 C3 195 PHTX DST Java Movie

2009/05/20 19:31:37 243 8 526 839 2607 290.7^*1 ---- ---- 249 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/05/21 12:30:03 116 41 235 433 370 5.6 1.4e+15 3.8e+29 113 C2 C3 195 PHTX DST Java Movie

2009/05/22 11:54:03 248 10 206 230 444 7.2^*1 ---- ---- 253 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/22 12:30:03 114 9 249 356 448 8.4^*1 ---- ---- 112 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/05/22 16:30:03 105 37 220 320 371 5.1^*1 1.1e+13 2.6e+27 93 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/05/23 02:30:03 116 8 260 360 417 6.4^*1 ---- ---- 113 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/05/23 05:54:03 108 13 273 434 604 15.1^*1 ---- ---- 104 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/23 06:30:03 288 16 141 157 335 4.1^*1 ---- ---- 281 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/23 23:06:46 17 8 324 363 851 27.7^*1 ---- ---- 18 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/05/24 04:06:03 273 36 117 156 504 10.4^*1 4.7e+13 3.2e+27 276 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/25 14:30:03 322 8 355 422 978 38.2^*1 ---- ---- 318 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/26 14:06:04 207 6 219 260 721 20.2^*1 ---- ---- 212 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/05/26 16:27:41 357 6 385 352 0 -18.1^*1 ---- ---- 358 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/05/27 02:30:03 60 6 223 315 1384 78.2^*1 ---- ---- 66 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/05/27 23:06:03 356 6 300 309 493 6.7^*1 ---- ---- 354 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/05/29 01:31:36 211 8 458 614 1822 144.6^*1 ---- ---- 219 C2 C3 195 PHTX DST Java Movie Poor Event; Only 3 points; Only C2

2009/05/29 09:30:03 258 74 139 349 318 4.3^*1 3.5e+15 3.4e+29 259 C2 C3 195 PHTX DST Java Movie

2009/05/30 18:54:03 84 63 143 339 302 3.9^*1 1.9e+15 1.9e+29 88 C2 C3 195 PHTX DST Java Movie Poor Event

2009/05/31 12:30:03 289 25 248 319 370 4.3^*1 3.2e+14 9.8e+28 282 C2 C3 195 PHTX DST Java Movie Poor Event

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
2009/05/01	06:26:04	254	31	279	356	340	3.2^*1	5.0e+12	1.9e+27	257	C2 C3 195 PHTX DST Java Movie
2009/05/01	12:06:04	11	7	265	290	506	8.3^*1	----	----	14	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/02	12:25:48	259	26	253	348	359	4.9^*1	4.7e+14	1.5e+29	266	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/03	08:00:03	301	14	338	293	169	-5.2^*1	----	----	288	C2 C3 PHTX DST Java Movie	Poor Event
2009/05/04	14:12:03	89	38	184	135	0	-6.9^*1	4.9e+13	8.3e+27	87	C2 C3 PHTX DST Java Movie	Very Poor Event
2009/05/05	23:12:03	80	52	372	338	330	-2.2	1.6e+15	1.1e+30	75	C2 C3 PHTX DST Java Movie
2009/05/06	11:12:03	85	53	336	327	313	-0.8^*1	1.1e+14	6.5e+28	72	C2 C3 PHTX DST Java Movie
2009/05/06	12:12:03	68	23	203	218	334	3.1^*1	2.3e+14	4.7e+28	71	C2 C3 PHTX DST Java Movie	Only C2
2009/05/06	23:12:03	223	4	315	231	0	-61.4^*1	----	----	229	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/07	00:36:03	70	8	123	144	359	4.9^*1	----	----	70	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/07	05:36:03	253	9	230	351	1273	66.2^*1	----	----	256	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/07	09:48:04	102	9	434	557	1470	86.4^*1	----	----	101	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/08	02:12:03	76	29	260	323	1133	50.7^*1	3.8e+13	1.3e+28	68	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/05/09	04:26:07	65	8	263	193	0	-12.2^*1	----	----	72	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/10	11:26:03	297	7	467	317	0	-63.4^*1	----	----	293	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/05/10	12:06:03	180	7	328	448	1283	67.5^*1	----	----	178	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/11	12:50:04	267	54	54	41	0	-1.7^*1	7.8e+13	1.1e+27	266	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/13	05:42:03	103	60	275	254	305	-2.6^*1	2.7e+14	1.0e+29	102	C2 C3 195 PHTX DST Java Movie	due to data gap this CME was observed only in C3; Poor Event; Only C3
2009/05/13	11:54:04	78	54	185	316	324	4.1^*1	6.1e+14	1.0e+29	84	C2 C3 195 PHTX DST Java Movie
2009/05/13	18:30:03	219	11	541	410	0	-73.8^*1	----	----	223	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/14	18:54:04	82	13	223	197	170	-1.4^*1	----	----	81	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/15	08:30:03	14	9	401	380	0	-11.9^*1	----	----	18	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/15	10:30:19	69	24	273	248	248	-1.1^*1	3.8e+14	1.4e+29	76	C2 C3 195 PHTX DST Java Movie
2009/05/15	12:06:05	14	10	549	279	0	-66.0^*1	----	----	19	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/16	02:30:03	248	7	312	364	505	7.9^*1	----	----	253	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/05/16	13:31:39	142	9	237	216	0	-12.4^*1	----	----	135	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/18	19:31:37	340	7	167	119	0	-21.3^*1	----	----	336	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/20	13:31:39	272	9	141	270	270	3.1^*1	----	----	273	C2 C3 195 PHTX DST Java Movie
2009/05/20	19:31:37	243	8	526	839	2607	290.7^*1	----	----	249	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/05/21	12:30:03	116	41	235	433	370	5.6	1.4e+15	3.8e+29	113	C2 C3 195 PHTX DST Java Movie
2009/05/22	11:54:03	248	10	206	230	444	7.2^*1	----	----	253	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/22	12:30:03	114	9	249	356	448	8.4^*1	----	----	112	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/05/22	16:30:03	105	37	220	320	371	5.1^*1	1.1e+13	2.6e+27	93	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/05/23	02:30:03	116	8	260	360	417	6.4^*1	----	----	113	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/05/23	05:54:03	108	13	273	434	604	15.1^*1	----	----	104	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/23	06:30:03	288	16	141	157	335	4.1^*1	----	----	281	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/23	23:06:46	17	8	324	363	851	27.7^*1	----	----	18	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/05/24	04:06:03	273	36	117	156	504	10.4^*1	4.7e+13	3.2e+27	276	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/25	14:30:03	322	8	355	422	978	38.2^*1	----	----	318	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/26	14:06:04	207	6	219	260	721	20.2^*1	----	----	212	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/05/26	16:27:41	357	6	385	352	0	-18.1^*1	----	----	358	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/05/27	02:30:03	60	6	223	315	1384	78.2^*1	----	----	66	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/05/27	23:06:03	356	6	300	309	493	6.7^*1	----	----	354	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/05/29	01:31:36	211	8	458	614	1822	144.6^*1	----	----	219	C2 C3 195 PHTX DST Java Movie	Poor Event; Only 3 points; Only C2
2009/05/29	09:30:03	258	74	139	349	318	4.3^*1	3.5e+15	3.4e+29	259	C2 C3 195 PHTX DST Java Movie
2009/05/30	18:54:03	84	63	143	339	302	3.9^*1	1.9e+15	1.9e+29	88	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/05/31	12:30:03	289	25	248	319	370	4.3^*1	3.2e+14	9.8e+28	282	C2 C3 195 PHTX DST Java Movie	Poor Event

*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).