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

2018/02/01 13:25:42 168 5 551 689 2249 208.4^*1 ---- ---- 167 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/02/02 02:00:05 173 8 227 260 757 22.6^*1 ---- ---- 169 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/02/02 15:12:08 0 6 305 449 2214 200.5^*1 ---- ---- 358 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/02/02 23:12:05 278 56 67 66 30 -0.2^*1 1.9e+14 4.3e+27 269 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/04 05:48:06 271 40 137 75 0 -10.0^*1 7.4e+13 6.9e+27 270 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/02/04 10:00:05 275 37 110 33 0 -8.9^*1 1.2e+14 7.3e+27 268 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/04 20:48:05 113 29 145 129 0 -1.4^*1 4.2e+14 4.4e+28 107 C2 C3 PHTX DST Java Movie Poor Event

2018/02/05 08:12:05 86 46 119 160 602 14.8^*1 1.2e+13 8.6e+26 89 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/06 04:12:05 311 18 140 279 769 25.0^*1 ---- ---- 312 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/06 09:48:05 257 17 183 165 0 -4.6^*1 ---- ---- 261 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/07 01:36:12 305 15 285 204 0 -27.5^*1 ---- ---- 298 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/02/08 07:48:06 114 16 232 340 558 12.1^*1 ---- ---- 109 C2 C3 PHTX DST Java Movie Poor Event

2018/02/08 10:36:05 271 12 151 195 549 11.9^*1 ---- ---- 269 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/09 01:25:24 301 9 221 187 0 -10.9^*1 ---- ---- 293 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/02/09 06:12:12 108 13 122 146 328 4.2^*1 ---- ---- 106 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/10 02:24:05 259 21 182 282 876 31.2^*1 7.0e+12 1.2e+27 258 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/12 01:25:18 Halo 360 661 754 734 9.2 6.2e+15^*2 1.3e+31^*2 247 C2 C3 PHTX DST Java Movie

2018/02/12 20:57:24 74 78 75 94 194 1.5^*1 2.1e+14 6.0e+27 76 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/02/13 17:48:05 65 74 269 206 0 -10.4^*1 7.5e+12 2.7e+27 69 C2 C3 PHTX DST Java Movie Very Poor Event

2018/02/15 00:12:05 259 22 87 108 393 6.4^*1 1.8e+13 7.0e+26 256 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/17 01:36:10 96 37 93 94 106 0.1^*1 5.6e+13 2.4e+27 93 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/17 04:48:05 266 33 201 492 837 29.3^*1 2.1e+14 4.3e+28 269 C2 C3 PHTX DST Java Movie Poor Event

2018/02/17 08:24:05 267 27 130 107 0 -3.7^*1 3.0e+13 2.5e+27 266 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/19 07:48:05 250 18 56 42 0 -0.9^*1 ---- ---- 251 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/02/19 15:48:05 263 75 292 311 320 1.1 2.2e+15 9.4e+29 261 C2 C3 PHTX DST Java Movie

2018/02/24 00:48:05 160 8 475 923 2382 239.6^*1 ---- ---- 155 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/24 01:36:09 282 41 165 96 0 -19.7^*1 4.5e+13 6.1e+27 284 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/25 00:12:05 12 6 187 17 0 -78.9^*1 ---- ---- 13 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/25 00:36:06 295 60 167 377 387 6.9^*1 1.6e+15 2.3e+29 291 C2 C3 PHTX DST Java Movie

2018/02/25 14:00:06 29 9 223 97 0 -35.7^*1 ---- ---- 30 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/27 10:12:07 37 9 279 278 248 -0.7^*1 ---- ---- 40 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/02/27 12:36:05 51 8 142 179 427 7.1^*1 ---- ---- 56 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/02/28 15:12:08 280 31 178 248 657 17.9^*1 1.4e+14 2.2e+28 280 C2 C3 PHTX DST Java Movie Poor Event; 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
2018/02/01	13:25:42	168	5	551	689	2249	208.4^*1	----	----	167	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/02/02	02:00:05	173	8	227	260	757	22.6^*1	----	----	169	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/02/02	15:12:08	0	6	305	449	2214	200.5^*1	----	----	358	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/02/02	23:12:05	278	56	67	66	30	-0.2^*1	1.9e+14	4.3e+27	269	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/04	05:48:06	271	40	137	75	0	-10.0^*1	7.4e+13	6.9e+27	270	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/02/04	10:00:05	275	37	110	33	0	-8.9^*1	1.2e+14	7.3e+27	268	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/04	20:48:05	113	29	145	129	0	-1.4^*1	4.2e+14	4.4e+28	107	C2 C3 PHTX DST Java Movie	Poor Event
2018/02/05	08:12:05	86	46	119	160	602	14.8^*1	1.2e+13	8.6e+26	89	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/06	04:12:05	311	18	140	279	769	25.0^*1	----	----	312	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/06	09:48:05	257	17	183	165	0	-4.6^*1	----	----	261	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/07	01:36:12	305	15	285	204	0	-27.5^*1	----	----	298	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/02/08	07:48:06	114	16	232	340	558	12.1^*1	----	----	109	C2 C3 PHTX DST Java Movie	Poor Event
2018/02/08	10:36:05	271	12	151	195	549	11.9^*1	----	----	269	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/09	01:25:24	301	9	221	187	0	-10.9^*1	----	----	293	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/02/09	06:12:12	108	13	122	146	328	4.2^*1	----	----	106	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/10	02:24:05	259	21	182	282	876	31.2^*1	7.0e+12	1.2e+27	258	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/12	01:25:18	Halo	360	661	754	734	9.2	6.2e+15^*2	1.3e+31^*2	247	C2 C3 PHTX DST Java Movie
2018/02/12	20:57:24	74	78	75	94	194	1.5^*1	2.1e+14	6.0e+27	76	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/02/13	17:48:05	65	74	269	206	0	-10.4^*1	7.5e+12	2.7e+27	69	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/02/15	00:12:05	259	22	87	108	393	6.4^*1	1.8e+13	7.0e+26	256	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/17	01:36:10	96	37	93	94	106	0.1^*1	5.6e+13	2.4e+27	93	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/17	04:48:05	266	33	201	492	837	29.3^*1	2.1e+14	4.3e+28	269	C2 C3 PHTX DST Java Movie	Poor Event
2018/02/17	08:24:05	267	27	130	107	0	-3.7^*1	3.0e+13	2.5e+27	266	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/19	07:48:05	250	18	56	42	0	-0.9^*1	----	----	251	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/02/19	15:48:05	263	75	292	311	320	1.1	2.2e+15	9.4e+29	261	C2 C3 PHTX DST Java Movie
2018/02/24	00:48:05	160	8	475	923	2382	239.6^*1	----	----	155	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/24	01:36:09	282	41	165	96	0	-19.7^*1	4.5e+13	6.1e+27	284	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/25	00:12:05	12	6	187	17	0	-78.9^*1	----	----	13	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/25	00:36:06	295	60	167	377	387	6.9^*1	1.6e+15	2.3e+29	291	C2 C3 PHTX DST Java Movie
2018/02/25	14:00:06	29	9	223	97	0	-35.7^*1	----	----	30	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/27	10:12:07	37	9	279	278	248	-0.7^*1	----	----	40	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/02/27	12:36:05	51	8	142	179	427	7.1^*1	----	----	56	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/02/28	15:12:08	280	31	178	248	657	17.9^*1	1.4e+14	2.2e+28	280	C2 C3 PHTX DST Java Movie	Poor Event; 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).