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

1997/04/01 06:22:00 79 68 267 229 0 -4.8^*1 1.3e+14 4.8e+28 83 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/04/01 09:24:33 69 74 496 743 1756 125.4^*1 ---- ---- 93 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2005/12/21; Poor Event

1997/04/01 12:05:23 80 58 272 253 0 -11.2^*1 ---- ---- 73 C2 C3 195 SXT PHTX DST Java Movie Newly inserted on 2005/12/21; Poor Event; Only 3 points; Only C2

1997/04/01 15:18:38 74 79 312 293 243 -2.2^*1 3.1e+14 1.5e+29 73 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/04/02 07:17:02 75 82 367 418 895 31.0^*1 6.4e+13^*2 4.3e+28^*2 84 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C2

1997/04/04 05:09:14 280 72 185 283 291 3.1 4.3e+15 7.3e+29 285 C2 C3 195 SXT PHTX DST Java Movie

1997/04/04 18:57:00 95 41 206 202 169 -0.7^*1 1.9e+14 3.9e+28 90 C2 C3 195 SXT PHTX DST Java Movie

1997/04/05 21:37:22 170 5 382 --- --- --- ---- ---- 168 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 2 points; Only C2

1997/04/06 01:24:33 301 7 675 842 1475 84.0^*1 ---- ---- 295 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

1997/04/07 06:26:05 320 >143 145 143 137 -0.1^*1 4.2e+14^*2 4.4e+28^*2 319 C2 C3 195 SXT PHTX DST Java Movie Uncertain Width; Partial Halo

1997/04/07 14:27:44 Halo (S) 360 878 905 896 3.3 1.0e+16^*2 4.0e+31^*2 123 C2 C3 195 SXT PHTX DST Java Movie

1997/04/09 12:06:52 277 63 485 519 529 3.2 1.4e+15 1.7e+30 263 C2 C3 195 SXT PHTX DST Java Movie

1997/04/11 02:06:28 96 41 155 144 29 -1.2^*1 1.4e+14 1.6e+28 99 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/04/13 16:12:26 269 43 391 467 415 3.9 ---- ---- 257 C2 C3 195 SXT PHTX DST Java Movie UVCS Only C3

1997/04/13 23:54:09 258 43 598 820 1448 84.3^*1 2.8e+14^*2 5.1e+29^*2 252 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/04/14 17:14:00 256 33 399 343 225 -6.8^*1 1.6e+14^*2 1.3e+29^*2 255 C2 C3 195 SXT PHTX DST Java Movie

1997/04/14 19:55:05 275 74 658 639 462 -10.7^*1 2.2e+14^*2 4.8e+29^*2 250 C2 C3 195 SXT PHTX DST Java Movie

1997/04/16 01:34:03 256 41 325 338 347 0.9 2.9e+14 1.5e+29 264 C2 C3 195 SXT PHTX DST Java Movie

1997/04/16 07:35:54 103 113 87 231 323 4.6 1.7e+15 6.6e+28 89 C2 C3 195 SXT PHTX DST Java Movie

1997/04/20 19:45:05 272 48 303 410 610 14.9^*1 4.8e+14 2.2e+29 274 C2 C3 195 SXT PHTX DST Java Movie

1997/04/22 22:57:05 63 33 176 181 214 0.7^*1 5.2e+13^*2 8.1e+27^*2 75 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1997/04/23 05:30:05 76 45 634 674 647 3.0^*1 ---- ---- 71 C2 C3 195 SXT PHTX DST Java Movie UVCS

1997/04/27 00:31:02 250 187 399 370 366 -2.4 1.4e+15^*2 1.1e+30^*2 267 C2 C3 195 SXT PHTX DST Java Movie Partial Halo

1997/04/27 10:26:05 Halo (S) 360 280 271 268 -0.5 4.5e+14^*2 1.7e+29^*2 268 C2 C3 195 SXT PHTX DST Java Movie

1997/04/27 14:59:05 Halo (BA) 360 255 180 0 -4.9 2.5e+14^*2 8.1e+28^*2 270 C2 C3 195 SXT PHTX DST Java Movie

1997/04/30 04:50:38 84 71 286 294 294 0.4 2.4e+15 9.6e+29 81 C2 C3 195 SXT PHTX DST Java Movie

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
1997/04/01	06:22:00	79	68	267	229	0	-4.8^*1	1.3e+14	4.8e+28	83	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/04/01	09:24:33	69	74	496	743	1756	125.4^*1	----	----	93	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2005/12/21; Poor Event
1997/04/01	12:05:23	80	58	272	253	0	-11.2^*1	----	----	73	C2 C3 195 SXT PHTX DST Java Movie	Newly inserted on 2005/12/21; Poor Event; Only 3 points; Only C2
1997/04/01	15:18:38	74	79	312	293	243	-2.2^*1	3.1e+14	1.5e+29	73	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/04/02	07:17:02	75	82	367	418	895	31.0^*1	6.4e+13^*2	4.3e+28^*2	84	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 3 points; Only C2
1997/04/04	05:09:14	280	72	185	283	291	3.1	4.3e+15	7.3e+29	285	C2 C3 195 SXT PHTX DST Java Movie
1997/04/04	18:57:00	95	41	206	202	169	-0.7^*1	1.9e+14	3.9e+28	90	C2 C3 195 SXT PHTX DST Java Movie
1997/04/05	21:37:22	170	5	382	---	---	---	----	----	168	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 2 points; Only C2
1997/04/06	01:24:33	301	7	675	842	1475	84.0^*1	----	----	295	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points
1997/04/07	06:26:05	320	>143	145	143	137	-0.1^*1	4.2e+14^*2	4.4e+28^*2	319	C2 C3 195 SXT PHTX DST Java Movie	Uncertain Width; Partial Halo
1997/04/07	14:27:44	Halo (S)	360	878	905	896	3.3	1.0e+16^*2	4.0e+31^*2	123	C2 C3 195 SXT PHTX DST Java Movie
1997/04/09	12:06:52	277	63	485	519	529	3.2	1.4e+15	1.7e+30	263	C2 C3 195 SXT PHTX DST Java Movie
1997/04/11	02:06:28	96	41	155	144	29	-1.2^*1	1.4e+14	1.6e+28	99	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/04/13	16:12:26	269	43	391	467	415	3.9	----	----	257	C2 C3 195 SXT PHTX DST Java Movie UVCS	Only C3
1997/04/13	23:54:09	258	43	598	820	1448	84.3^*1	2.8e+14^*2	5.1e+29^*2	252	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/04/14	17:14:00	256	33	399	343	225	-6.8^*1	1.6e+14^*2	1.3e+29^*2	255	C2 C3 195 SXT PHTX DST Java Movie
1997/04/14	19:55:05	275	74	658	639	462	-10.7^*1	2.2e+14^*2	4.8e+29^*2	250	C2 C3 195 SXT PHTX DST Java Movie
1997/04/16	01:34:03	256	41	325	338	347	0.9	2.9e+14	1.5e+29	264	C2 C3 195 SXT PHTX DST Java Movie
1997/04/16	07:35:54	103	113	87	231	323	4.6	1.7e+15	6.6e+28	89	C2 C3 195 SXT PHTX DST Java Movie
1997/04/20	19:45:05	272	48	303	410	610	14.9^*1	4.8e+14	2.2e+29	274	C2 C3 195 SXT PHTX DST Java Movie
1997/04/22	22:57:05	63	33	176	181	214	0.7^*1	5.2e+13^*2	8.1e+27^*2	75	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1997/04/23	05:30:05	76	45	634	674	647	3.0^*1	----	----	71	C2 C3 195 SXT PHTX DST Java Movie UVCS
1997/04/27	00:31:02	250	187	399	370	366	-2.4	1.4e+15^*2	1.1e+30^*2	267	C2 C3 195 SXT PHTX DST Java Movie	Partial Halo
1997/04/27	10:26:05	Halo (S)	360	280	271	268	-0.5	4.5e+14^*2	1.7e+29^*2	268	C2 C3 195 SXT PHTX DST Java Movie
1997/04/27	14:59:05	Halo (BA)	360	255	180	0	-4.9	2.5e+14^*2	8.1e+28^*2	270	C2 C3 195 SXT PHTX DST Java Movie
1997/04/30	04:50:38	84	71	286	294	294	0.4	2.4e+15	9.6e+29	81	C2 C3 195 SXT PHTX DST Java Movie

*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).