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

1996/09/02 09:45:05 66 13 571 464 0 -48.1^*1 ---- ---- 73 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points

1996/09/03 06:25:10 246 52 56 3 0 -15.5^*1 ---- ---- 247 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

1996/09/03 23:10:10 86 31 260 --- --- --- ---- ---- 86 C2 C3 195 SXT PHTX DST Java Movie Only 2 points; Only C2

1996/09/04 23:05:05 243 13 255 234 0 -3.8^*1 ---- ---- 248 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

1996/09/07 09:57:08 294 8 127 148 187 1.1^*1 ---- ---- 292 C2 C3 SXT PHTX DST Java Movie Only C3

1996/09/08 12:45:06 93 46 195 196 196 0.0^*1 5.3e+14 1.0e+29 96 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3

1996/09/09 01:50:06 246 63 146 123 0 -2.0^*1 1.2e+13 1.3e+27 233 C2 C3 SXT PHTX DST Java Movie Poor Event

1996/09/09 07:10:06 285 61 245 384 400 6.8^*1 6.6e+13 2.0e+28 292 C2 C3 SXT PHTX DST Java Movie

1996/09/17 11:10:05 266 27 410 --- --- --- ---- ---- 265 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 2 points; Only C2

1996/09/17 20:50:08 269 15 71 --- --- --- ---- ---- 271 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 2 points; Only C2

1996/09/18 00:10:05 285 59 191 201 215 0.6^*1 4.8e+14 8.7e+28 298 C2 C3 195 SXT PHTX DST Java Movie

1996/09/19 06:20:05 248 28 120 44 0 -17.0^*1 3.2e+13^*2 2.3e+27^*2 247 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

1996/09/20 04:35:08 244 19 128 305 478 9.9^*1 ---- ---- 252 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1996/09/20 18:50:56 75 33 274 415 354 4.4 5.5e+14 2.1e+29 72 C2 C3 195 SXT PHTX DST Java Movie

1996/09/22 02:01:58 70 32 188 225 284 2.7^*1 2.2e+14 3.9e+28 71 C2 C3 195 SXT PHTX DST Java Movie Poor Event

1996/09/24 12:52:05 73 40 250 242 235 -0.6^*1 1.6e+13 5.0e+27 65 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3

1996/09/26 05:05:05 205 103 201 284 355 5.7 ---- ---- 242 C2 C3 195 SXT PHTX DST Java Movie Only C3

1996/09/27 11:42:05 277 17 276 429 632 16.1^*1 ---- ---- 272 C2 C3 195 SXT PHTX DST Java Movie

1996/09/29 07:09:37 313 32 164 234 383 5.9^*1 7.6e+12 1.0e+27 304 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
1996/09/02	09:45:05	66	13	571	464	0	-48.1^*1	----	----	73	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 3 points
1996/09/03	06:25:10	246	52	56	3	0	-15.5^*1	----	----	247	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
1996/09/03	23:10:10	86	31	260	---	---	---	----	----	86	C2 C3 195 SXT PHTX DST Java Movie	Only 2 points; Only C2
1996/09/04	23:05:05	243	13	255	234	0	-3.8^*1	----	----	248	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points
1996/09/07	09:57:08	294	8	127	148	187	1.1^*1	----	----	292	C2 C3 SXT PHTX DST Java Movie	Only C3
1996/09/08	12:45:06	93	46	195	196	196	0.0^*1	5.3e+14	1.0e+29	96	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/09/09	01:50:06	246	63	146	123	0	-2.0^*1	1.2e+13	1.3e+27	233	C2 C3 SXT PHTX DST Java Movie	Poor Event
1996/09/09	07:10:06	285	61	245	384	400	6.8^*1	6.6e+13	2.0e+28	292	C2 C3 SXT PHTX DST Java Movie
1996/09/17	11:10:05	266	27	410	---	---	---	----	----	265	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 2 points; Only C2
1996/09/17	20:50:08	269	15	71	---	---	---	----	----	271	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 2 points; Only C2
1996/09/18	00:10:05	285	59	191	201	215	0.6^*1	4.8e+14	8.7e+28	298	C2 C3 195 SXT PHTX DST Java Movie
1996/09/19	06:20:05	248	28	120	44	0	-17.0^*1	3.2e+13^*2	2.3e+27^*2	247	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
1996/09/20	04:35:08	244	19	128	305	478	9.9^*1	----	----	252	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1996/09/20	18:50:56	75	33	274	415	354	4.4	5.5e+14	2.1e+29	72	C2 C3 195 SXT PHTX DST Java Movie
1996/09/22	02:01:58	70	32	188	225	284	2.7^*1	2.2e+14	3.9e+28	71	C2 C3 195 SXT PHTX DST Java Movie	Poor Event
1996/09/24	12:52:05	73	40	250	242	235	-0.6^*1	1.6e+13	5.0e+27	65	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/09/26	05:05:05	205	103	201	284	355	5.7	----	----	242	C2 C3 195 SXT PHTX DST Java Movie	Only C3
1996/09/27	11:42:05	277	17	276	429	632	16.1^*1	----	----	272	C2 C3 195 SXT PHTX DST Java Movie
1996/09/29	07:09:37	313	32	164	234	383	5.9^*1	7.6e+12	1.0e+27	304	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).