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

2009/08/01 03:56:26 271 7 245 463 1513 97.3^*1 ---- ---- 266 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/01 03:56:26 77 33 175 197 223 1.1^*1 1.2e+13 1.9e+27 74 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/02 03:31:40 27 10 378 609 2263 214.0^*1 ---- ---- 31 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/08/02 10:33:57 77 9 224 255 458 7.3^*1 ---- ---- 78 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/04 05:06:03 180 7 418 288 0 -90.6^*1 ---- ---- 179 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/08/04 11:54:03 236 96 159 208 202 1.1^*1 6.6e+14 8.4e+28 243 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/05 12:00:35 235 7 384 381 340 -1.4^*1 ---- ---- 243 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2009/08/08 14:12:03 105 41 208 288 288 3.1^*1 1.5e+15 3.2e+29 102 C2 C3 PHTX DST Java Movie

2009/08/13 20:24:24 261 39 234 235 235 0.0^*1 1.8e+14 4.8e+28 268 C2 195 PHTX DST Java Movie Poor Event

2009/08/14 01:30:03 311 11 363 323 0 -16.5^*1 ---- ---- 302 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/14 07:54:03 266 57 109 215 207 1.8^*1 7.9e+14 4.7e+28 268 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/15 06:30:03 102 18 244 246 249 0.1^*1 ---- ---- 105 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/15 17:06:03 264 9 300 234 0 -21.9^*1 ---- ---- 265 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/08/16 02:30:03 7 6 315 474 1139 53.3^*1 ---- ---- 12 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/16 09:54:03 105 6 163 249 741 23.6^*1 ---- ---- 106 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/16 09:54:03 69 7 124 172 408 6.8^*1 ---- ---- 66 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/16 17:30:03 254 31 238 213 0 -3.7^*1 3.8e+13 1.1e+28 261 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/08/17 01:30:03 338 13 347 390 660 14.1^*1 ---- ---- 332 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/08/17 11:30:03 103 29 370 336 0 -13.3^*1 4.5e+13 3.1e+28 100 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/18 17:06:03 102 45 39 46 96 0.3^*1 2.0e+14 1.5e+27 92 C2 C3 195 PHTX DST Java Movie system of a diffuse loop front; Very Poor Event; Only C2

2009/08/19 03:30:03 307 79 258 427 429 7.5^*1 1.0e+15 3.4e+29 308 C2 C3 195 PHTX DST Java Movie

2009/08/19 16:06:03 308 7 167 176 200 0.6^*1 ---- ---- 308 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/08/19 16:30:03 294 8 292 281 266 -0.9^*1 ---- ---- 289 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/19 22:30:03 311 28 255 274 340 2.6^*1 3.4e+13 1.1e+28 303 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/08/20 18:06:04 79 10 140 186 378 5.8^*1 ---- ---- 83 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/08/20 19:31:37 114 13 168 156 0 -2.5^*1 ---- ---- 109 C2 C3 195 PHTX DST Java Movie Very Poor Event

2009/08/21 02:30:03 358 5 431 439 538 4.7^*1 ---- ---- 358 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/21 20:06:24 128 6 121 190 808 26.7^*1 ---- ---- 127 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/22 14:08:38 4 7 341 425 1001 38.9^*1 ---- ---- 3 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/22 18:54:25 14 8 295 145 0 -147.3^*1 ---- ---- 16 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/08/22 21:30:06 3 7 480 499 682 10.7^*1 ---- ---- 2 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/23 00:06:03 263 10 290 404 496 9.6^*1 ---- ---- 262 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/24 00:54:03 57 22 536 613 586 5.6^*1 3.2e+14 4.6e+29 69 C2 C3 195 PHTX DST Java Movie

2009/08/25 02:54:03 15 7 350 331 0 -10.3^*1 ---- ---- 14 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/25 06:30:03 82 67 237 452 439 8.1^*1 1.1e+15 3.2e+29 74 C2 C3 195 PHTX DST Java Movie

2009/08/26 00:30:03 262 28 96 159 187 1.4^*1 2.5e+14 1.2e+28 261 C2 C3 195 PHTX DST Java Movie

2009/08/26 07:31:37 197 8 296 389 1447 85.9^*1 ---- ---- 200 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/08/26 12:54:03 266 23 314 432 1144 53.2^*1 1.2e+13 5.7e+27 267 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/08/26 14:30:03 149 8 280 309 817 24.9^*1 ---- ---- 145 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2009/08/26 14:30:03 111 9 176 215 261 2.1^*1 ---- ---- 107 C2 C3 195 PHTX DST Java Movie Poor Event

2009/08/27 19:54:03 263 34 136 90 0 -9.7^*1 3.2e+13 2.9e+27 262 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/28 06:06:04 205 7 234 134 0 -28.9^*1 ---- ---- 213 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/28 06:30:03 4 7 290 218 0 -26.2^*1 ---- ---- 9 C2 C3 195 PHTX DST Java Movie Very Poor Event; Only C2

2009/08/30 15:30:03 77 69 199 340 290 3.2 2.5e+15 4.9e+29 73 C2 C3 195 PHTX DST Java Movie

2009/08/30 19:31:38 238 12 205 112 0 -25.3^*1 ---- ---- 244 C2 C3 195 PHTX DST Java Movie Poor Event; Only C2

2009/08/30 20:30:03 290 9 330 166 0 -62.7^*1 ---- ---- 285 C2 C3 195 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
2009/08/01	03:56:26	271	7	245	463	1513	97.3^*1	----	----	266	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/01	03:56:26	77	33	175	197	223	1.1^*1	1.2e+13	1.9e+27	74	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/02	03:31:40	27	10	378	609	2263	214.0^*1	----	----	31	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/08/02	10:33:57	77	9	224	255	458	7.3^*1	----	----	78	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/04	05:06:03	180	7	418	288	0	-90.6^*1	----	----	179	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/08/04	11:54:03	236	96	159	208	202	1.1^*1	6.6e+14	8.4e+28	243	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/05	12:00:35	235	7	384	381	340	-1.4^*1	----	----	243	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2009/08/08	14:12:03	105	41	208	288	288	3.1^*1	1.5e+15	3.2e+29	102	C2 C3 PHTX DST Java Movie
2009/08/13	20:24:24	261	39	234	235	235	0.0^*1	1.8e+14	4.8e+28	268	C2 195 PHTX DST Java Movie	Poor Event
2009/08/14	01:30:03	311	11	363	323	0	-16.5^*1	----	----	302	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/14	07:54:03	266	57	109	215	207	1.8^*1	7.9e+14	4.7e+28	268	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/15	06:30:03	102	18	244	246	249	0.1^*1	----	----	105	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/15	17:06:03	264	9	300	234	0	-21.9^*1	----	----	265	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/08/16	02:30:03	7	6	315	474	1139	53.3^*1	----	----	12	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/16	09:54:03	105	6	163	249	741	23.6^*1	----	----	106	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/16	09:54:03	69	7	124	172	408	6.8^*1	----	----	66	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/16	17:30:03	254	31	238	213	0	-3.7^*1	3.8e+13	1.1e+28	261	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/08/17	01:30:03	338	13	347	390	660	14.1^*1	----	----	332	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/08/17	11:30:03	103	29	370	336	0	-13.3^*1	4.5e+13	3.1e+28	100	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/18	17:06:03	102	45	39	46	96	0.3^*1	2.0e+14	1.5e+27	92	C2 C3 195 PHTX DST Java Movie	system of a diffuse loop front; Very Poor Event; Only C2
2009/08/19	03:30:03	307	79	258	427	429	7.5^*1	1.0e+15	3.4e+29	308	C2 C3 195 PHTX DST Java Movie
2009/08/19	16:06:03	308	7	167	176	200	0.6^*1	----	----	308	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/08/19	16:30:03	294	8	292	281	266	-0.9^*1	----	----	289	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/19	22:30:03	311	28	255	274	340	2.6^*1	3.4e+13	1.1e+28	303	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/08/20	18:06:04	79	10	140	186	378	5.8^*1	----	----	83	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/08/20	19:31:37	114	13	168	156	0	-2.5^*1	----	----	109	C2 C3 195 PHTX DST Java Movie	Very Poor Event
2009/08/21	02:30:03	358	5	431	439	538	4.7^*1	----	----	358	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/21	20:06:24	128	6	121	190	808	26.7^*1	----	----	127	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/22	14:08:38	4	7	341	425	1001	38.9^*1	----	----	3	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/22	18:54:25	14	8	295	145	0	-147.3^*1	----	----	16	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/08/22	21:30:06	3	7	480	499	682	10.7^*1	----	----	2	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/23	00:06:03	263	10	290	404	496	9.6^*1	----	----	262	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/24	00:54:03	57	22	536	613	586	5.6^*1	3.2e+14	4.6e+29	69	C2 C3 195 PHTX DST Java Movie
2009/08/25	02:54:03	15	7	350	331	0	-10.3^*1	----	----	14	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/25	06:30:03	82	67	237	452	439	8.1^*1	1.1e+15	3.2e+29	74	C2 C3 195 PHTX DST Java Movie
2009/08/26	00:30:03	262	28	96	159	187	1.4^*1	2.5e+14	1.2e+28	261	C2 C3 195 PHTX DST Java Movie
2009/08/26	07:31:37	197	8	296	389	1447	85.9^*1	----	----	200	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/08/26	12:54:03	266	23	314	432	1144	53.2^*1	1.2e+13	5.7e+27	267	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/08/26	14:30:03	149	8	280	309	817	24.9^*1	----	----	145	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2009/08/26	14:30:03	111	9	176	215	261	2.1^*1	----	----	107	C2 C3 195 PHTX DST Java Movie	Poor Event
2009/08/27	19:54:03	263	34	136	90	0	-9.7^*1	3.2e+13	2.9e+27	262	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/28	06:06:04	205	7	234	134	0	-28.9^*1	----	----	213	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/28	06:30:03	4	7	290	218	0	-26.2^*1	----	----	9	C2 C3 195 PHTX DST Java Movie	Very Poor Event; Only C2
2009/08/30	15:30:03	77	69	199	340	290	3.2	2.5e+15	4.9e+29	73	C2 C3 195 PHTX DST Java Movie
2009/08/30	19:31:38	238	12	205	112	0	-25.3^*1	----	----	244	C2 C3 195 PHTX DST Java Movie	Poor Event; Only C2
2009/08/30	20:30:03	290	9	330	166	0	-62.7^*1	----	----	285	C2 C3 195 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).