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

1996/02/03 00:07:03 83 52 306 317 309 0.9^*1 1.9e+15 8.9e+29 80 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3

1996/02/08 05:17:49 263 70 184 126 0 -6.0^*1 1.6e+14 2.7e+28 249 C2 C3 SXT PHTX DST Java Movie Poor Event; Only C3

1996/02/12 05:47:26 91 53 160 211 236 2.0^*1 1.3e+15 1.7e+29 92 C2 C3 SXT PHTX DST Java Movie Poor Event

1996/02/17 02:06:31 279 73 317 378 532 9.9^*1 3.3e+14^*2 1.6e+29^*2 274 C2 C3 SXT PHTX DST Java Movie Very Poor Event

1996/02/17 05:18:59 86 36 171 279 819 27.9^*1 2.1e+14^*2 3.1e+28^*2 88 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

1996/02/19 05:15:48 98 30 266 403 946 36.7^*1 1.3e+14^*2 4.6e+28^*2 94 C2 C3 SXT PHTX DST Java Movie Very Poor Event; Only 3 points; 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
1996/02/03	00:07:03	83	52	306	317	309	0.9^*1	1.9e+15	8.9e+29	80	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/02/08	05:17:49	263	70	184	126	0	-6.0^*1	1.6e+14	2.7e+28	249	C2 C3 SXT PHTX DST Java Movie	Poor Event; Only C3
1996/02/12	05:47:26	91	53	160	211	236	2.0^*1	1.3e+15	1.7e+29	92	C2 C3 SXT PHTX DST Java Movie	Poor Event
1996/02/17	02:06:31	279	73	317	378	532	9.9^*1	3.3e+14^*2	1.6e+29^*2	274	C2 C3 SXT PHTX DST Java Movie	Very Poor Event
1996/02/17	05:18:59	86	36	171	279	819	27.9^*1	2.1e+14^*2	3.1e+28^*2	88	C2 C3 SXT PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
1996/02/19	05:15:48	98	30	266	403	946	36.7^*1	1.3e+14^*2	4.6e+28^*2	94	C2 C3 SXT PHTX DST Java Movie	Very Poor Event; Only 3 points; 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).