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

1996/04/02 02:36:21 267 37 192 263 246 2.7^*1 7.4e+14 1.4e+29 263 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3

1996/04/03 14:30:40 257 36 ---- --- --- --- ---- ---- 255 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure

1996/04/05 06:11:28 273 47 323 272 367 -6.7^*1 1.3e+15^*2 6.7e+29^*2 271 C2 C3 SXT PHTX DST Java Movie Only 3 points; Only C3

1996/04/06 00:51:12 268 37 293 419 350 8.7^*1 8.8e+13^*2 3.8e+28^*2 270 C2 C3 SXT PHTX DST Java Movie Only C3

1996/04/07 06:59:24 258 42 324 481 488 9.2^*1 4.3e+14 2.3e+29 269 C2 C3 SXT PHTX DST Java Movie

1996/04/08 01:03:21 266 29 314 279 330 -3.4^*1 2.2e+12^*2 1.1e+27^*2 269 C2 C3 SXT PHTX DST Java Movie Poor Event; Only 3 points; Only C3

1996/04/08 04:12:26 258 15 124 94 0 -1.3^*1 ---- ---- 262 C2 C3 SXT PHTX DST Java Movie

1996/04/08 07:53:42 105 22 128 161 227 2.0^*1 ---- ---- 99 C2 C3 SXT PHTX DST Java Movie Poor Event

1996/04/11 11:17:09 88 49 272 278 303 0.9^*1 ---- ---- 89 C2 C3 SXT PHTX DST Java Movie Poor Event

1996/04/12 04:45:24 275 57 100 117 154 0.8^*1 5.2e+14^*2 2.6e+28^*2 272 C2 C3 SXT PHTX DST Java Movie Very Poor Event

1996/04/13 00:52:12 265 39 157 171 190 1.0^*1 4.9e+13^*2 6.0e+27^*2 266 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3

1996/04/13 04:02:02 262 46 114 115 116 0.0^*1 ---- ---- 253 C2 C3 SXT PHTX DST Java Movie

1996/04/15 03:00:25 98 22 97 82 0 -1.4^*1 ---- ---- 96 C2 C3 SXT PHTX DST Java Movie Only 3 points; Only C2

1996/04/15 10:53:48 282 17 ---- --- --- --- ---- ---- 275 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C2; Unable to measure

1996/04/17 09:49:57 94 13 225 244 272 1.9^*1 ---- ---- 94 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3

1996/04/25 11:30:16 272 68 186 208 189 1.1^*1 2.1e+15^*2 3.7e+29^*2 284 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only C3

1996/04/29 14:38:48 Halo (S) 360 65 --- --- --- ---- ---- 149 C2 C3 SXT PHTX DST Java Movie Faint; Very Poor Event; Only 2 points; Only C2

1996/04/30 13:43:42 92 56 112 129 172 1.0^*1 5.6e+14 3.5e+28 89 C2 C3 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
1996/04/02	02:36:21	267	37	192	263	246	2.7^*1	7.4e+14	1.4e+29	263	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/04/03	14:30:40	257	36	----	---	---	---	----	----	255	C2 C3 SXT PHTX DST Java Movie	Very Poor Event; Only C2; Unable to measure
1996/04/05	06:11:28	273	47	323	272	367	-6.7^*1	1.3e+15^*2	6.7e+29^*2	271	C2 C3 SXT PHTX DST Java Movie	Only 3 points; Only C3
1996/04/06	00:51:12	268	37	293	419	350	8.7^*1	8.8e+13^*2	3.8e+28^*2	270	C2 C3 SXT PHTX DST Java Movie	Only C3
1996/04/07	06:59:24	258	42	324	481	488	9.2^*1	4.3e+14	2.3e+29	269	C2 C3 SXT PHTX DST Java Movie
1996/04/08	01:03:21	266	29	314	279	330	-3.4^*1	2.2e+12^*2	1.1e+27^*2	269	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only 3 points; Only C3
1996/04/08	04:12:26	258	15	124	94	0	-1.3^*1	----	----	262	C2 C3 SXT PHTX DST Java Movie
1996/04/08	07:53:42	105	22	128	161	227	2.0^*1	----	----	99	C2 C3 SXT PHTX DST Java Movie	Poor Event
1996/04/11	11:17:09	88	49	272	278	303	0.9^*1	----	----	89	C2 C3 SXT PHTX DST Java Movie	Poor Event
1996/04/12	04:45:24	275	57	100	117	154	0.8^*1	5.2e+14^*2	2.6e+28^*2	272	C2 C3 SXT PHTX DST Java Movie	Very Poor Event
1996/04/13	00:52:12	265	39	157	171	190	1.0^*1	4.9e+13^*2	6.0e+27^*2	266	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/04/13	04:02:02	262	46	114	115	116	0.0^*1	----	----	253	C2 C3 SXT PHTX DST Java Movie
1996/04/15	03:00:25	98	22	97	82	0	-1.4^*1	----	----	96	C2 C3 SXT PHTX DST Java Movie	Only 3 points; Only C2
1996/04/15	10:53:48	282	17	----	---	---	---	----	----	275	C2 C3 SXT PHTX DST Java Movie	Very Poor Event; Only C2; Unable to measure
1996/04/17	09:49:57	94	13	225	244	272	1.9^*1	----	----	94	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/04/25	11:30:16	272	68	186	208	189	1.1^*1	2.1e+15^*2	3.7e+29^*2	284	C2 C3 SXT PHTX DST Java Movie	Very Poor Event; Only C3
1996/04/29	14:38:48	Halo (S)	360	65	---	---	---	----	----	149	C2 C3 SXT PHTX DST Java Movie	Faint; Very Poor Event; Only 2 points; Only C2
1996/04/30	13:43:42	92	56	112	129	172	1.0^*1	5.6e+14	3.5e+28	89	C2 C3 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).