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

1997/03/03 07:35:58 90 58 240 494 1489 101.9^*1 2.5e+13^*2 7.2e+27^*2 78 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

1997/03/03 12:30:05 76 25 208 282 373 6.3^*1 ---- ---- 84 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3

1997/03/05 22:30:07 313 20 460 437 265 -7.3^*1 2.0e+13^*2 2.1e+28^*2 301 C2 C3 195 SXT PHTX DST Java Movie Only 3 points

1997/03/06 01:36:10 104 27 301 188 0 -21.4^*1 ---- ---- 101 C2 C3 195 SXT PHTX DST Java Movie UVCS

1997/03/09 04:30:06 54 146 517 650 595 8.4 2.6e+15^*2 3.5e+30^*2 69 C2 C3 195 SXT PHTX DST Java Movie Partial Halo

1997/03/11 11:30:06 10 5 125 185 299 3.6 ---- ---- 12 C2 C3 195 SXT PHTX DST Java Movie

1997/03/12 12:30:05 260 47 290 267 259 -1.3 1.3e+15 5.5e+29 273 C2 C3 195 SXT PHTX DST Java Movie

1997/03/15 13:35:59 264 45 221 313 364 5.6^*1 ---- ---- 272 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only C3

1997/03/15 17:30:05 263 59 329 378 445 5.8^*1 3.7e+14 2.0e+29 261 C2 C3 195 SXT PHTX DST Java Movie Only C3

1997/03/17 02:30:56 254 118 443 606 549 9.3 1.5e+15 1.5e+30 255 C2 C3 195 SXT PHTX DST Java Movie

1997/03/23 15:04:14 268 44 31 35 69 0.2^*1 ---- ---- 269 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C2

1997/03/24 07:37:25 232 162 140 177 360 5.2^*1 9.2e+13^*2 9.0e+27^*2 254 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Partial Halo

1997/03/25 22:45:05 87 45 ---- --- --- --- ---- ---- 88 C2 C3 195 SXT PHTX DST Java Movie UVCS Very Poor Event; Unable to measure

1997/03/26 00:30:41 94 52 173 149 0 -4.3^*1 2.6e+14^*2 3.9e+28^*2 84 C2 C3 195 SXT PHTX DST Java Movie Poor Event; Only 3 points

1997/03/27 15:05:05 271 70 83 107 279 3.4^*1 1.1e+14 3.7e+27 293 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C2

1997/03/28 02:55:05 89 35 309 350 358 3.2^*1 ---- ---- 90 C2 C3 195 SXT PHTX DST Java Movie Very Poor Event; Only C3

1997/03/28 18:17:46 112 56 146 140 87 -0.7^*1 6.1e+14 6.5e+28 105 C2 C3 195 SXT PHTX DST Java Movie

1997/03/31 05:30:05 274 56 225 208 172 -1.3^*1 7.7e+13^*2 1.9e+28^*2 266 C2 C3 195 SXT 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
1997/03/03	07:35:58	90	58	240	494	1489	101.9^*1	2.5e+13^*2	7.2e+27^*2	78	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
1997/03/03	12:30:05	76	25	208	282	373	6.3^*1	----	----	84	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only C3
1997/03/05	22:30:07	313	20	460	437	265	-7.3^*1	2.0e+13^*2	2.1e+28^*2	301	C2 C3 195 SXT PHTX DST Java Movie	Only 3 points
1997/03/06	01:36:10	104	27	301	188	0	-21.4^*1	----	----	101	C2 C3 195 SXT PHTX DST Java Movie UVCS
1997/03/09	04:30:06	54	146	517	650	595	8.4	2.6e+15^*2	3.5e+30^*2	69	C2 C3 195 SXT PHTX DST Java Movie	Partial Halo
1997/03/11	11:30:06	10	5	125	185	299	3.6	----	----	12	C2 C3 195 SXT PHTX DST Java Movie
1997/03/12	12:30:05	260	47	290	267	259	-1.3	1.3e+15	5.5e+29	273	C2 C3 195 SXT PHTX DST Java Movie
1997/03/15	13:35:59	264	45	221	313	364	5.6^*1	----	----	272	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only C3
1997/03/15	17:30:05	263	59	329	378	445	5.8^*1	3.7e+14	2.0e+29	261	C2 C3 195 SXT PHTX DST Java Movie	Only C3
1997/03/17	02:30:56	254	118	443	606	549	9.3	1.5e+15	1.5e+30	255	C2 C3 195 SXT PHTX DST Java Movie
1997/03/23	15:04:14	268	44	31	35	69	0.2^*1	----	----	269	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C2
1997/03/24	07:37:25	232	162	140	177	360	5.2^*1	9.2e+13^*2	9.0e+27^*2	254	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Partial Halo
1997/03/25	22:45:05	87	45	----	---	---	---	----	----	88	C2 C3 195 SXT PHTX DST Java Movie UVCS	Very Poor Event; Unable to measure
1997/03/26	00:30:41	94	52	173	149	0	-4.3^*1	2.6e+14^*2	3.9e+28^*2	84	C2 C3 195 SXT PHTX DST Java Movie	Poor Event; Only 3 points
1997/03/27	15:05:05	271	70	83	107	279	3.4^*1	1.1e+14	3.7e+27	293	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only C2
1997/03/28	02:55:05	89	35	309	350	358	3.2^*1	----	----	90	C2 C3 195 SXT PHTX DST Java Movie	Very Poor Event; Only C3
1997/03/28	18:17:46	112	56	146	140	87	-0.7^*1	6.1e+14	6.5e+28	105	C2 C3 195 SXT PHTX DST Java Movie
1997/03/31	05:30:05	274	56	225	208	172	-1.3^*1	7.7e+13^*2	1.9e+28^*2	266	C2 C3 195 SXT 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).