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

2019/08/01 20:56:52 231 11 273 550 2373 233.8^*1 ---- ---- 230 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2019/08/04 12:00:05 228 30 48 59 120 0.6^*1 8.0e+13 9.3e+26 228 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/04 16:00:05 277 12 179 193 319 3.4^*1 ---- ---- 276 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/04 17:36:05 273 37 431 360 136 -9.1^*1 6.9e+13 6.4e+28 274 C2 C3 PHTX DST Java Movie Poor Event

2019/08/05 02:12:05 275 13 154 85 0 -17.3^*1 ---- ---- 273 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/05 03:12:11 75 23 325 222 0 -103.3^*1 4.9e+12^*2 2.6e+27^*2 77 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2019/08/05 19:24:05 223 16 223 261 375 4.6^*1 ---- ---- 226 C2 C3 PHTX DST Java Movie Poor Event

2019/08/05 22:18:05 230 8 357 387 437 3.7^*1 ---- ---- 232 C2 C3 PHTX DST Java Movie Poor Event

2019/08/06 01:36:05 252 68 554 645 727 15.4^*1 1.4e+14 2.2e+29 252 C2 C3 PHTX DST Java Movie Poor Event

2019/08/06 04:12:05 250 55 164 186 292 2.8^*1 1.1e+14 1.5e+28 244 C2 C3 PHTX DST Java Movie Poor Event

2019/08/06 11:48:05 244 87 333 377 450 5.1^*1 1.3e+14 7.1e+28 236 C2 C3 PHTX DST Java Movie Poor Event

2019/08/06 21:48:05 263 36 248 176 0 -14.6^*1 2.1e+13 6.5e+27 272 C2 C3 PHTX DST Java Movie Poor Event

2019/08/07 00:12:05 234 8 451 450 446 -0.3^*1 ---- ---- 231 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/07 05:12:05 252 12 388 462 571 9.6^*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Poor Event

2019/08/09 15:29:55 81 70 152 274 309 3.9^*1 3.4e+13 4.0e+27 79 C2 C3 PHTX DST Java Movie

2019/08/10 12:36:05 79 13 88 118 261 2.9^*1 ---- ---- 81 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/11 19:48:06 54 35 169 155 0 -2.1^*1 7.9e+12 1.1e+27 52 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/12 21:12:09 75 37 224 468 406 7.1 2.2e+15 5.4e+29 80 C2 C3 PHTX DST Java Movie

2019/08/13 15:24:05 79 39 243 261 308 1.9^*1 9.4e+13 2.8e+28 79 C2 C3 PHTX DST Java Movie Poor Event

2019/08/14 15:37:37 215 8 533 475 0 -45.1^*1 ---- ---- 218 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2019/08/16 08:36:06 259 8 278 279 306 0.7^*1 ---- ---- 260 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2019/08/19 04:00:05 259 36 226 301 733 21.9^*1 1.2e+13 3.0e+27 252 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2019/08/19 08:12:05 69 9 250 329 428 6.8^*1 ---- ---- 76 C2 C3 PHTX DST Java Movie Poor Event

2019/08/20 08:12:05 56 5 375 462 958 34.3^*1 ---- ---- 62 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2019/08/21 01:25:43 53 12 373 377 410 1.4^*1 ---- ---- 64 C2 C3 PHTX DST Java Movie Poor Event

2019/08/22 19:00:05 245 11 254 302 784 23.7^*1 ---- ---- 246 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2019/08/25 00:12:05 90 50 132 197 503 11.8^*1 5.4e+13 4.7e+27 97 C2 C3 PHTX DST Java Movie Poor Event

2019/08/25 01:36:15 271 10 236 185 0 -4.7^*1 ---- ---- 269 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/27 10:00:05 283 39 158 260 428 7.6^*1 4.9e+14 6.1e+28 279 C2 C3 PHTX DST Java Movie Poor Event

2019/08/27 21:24:05 274 27 166 201 280 2.7^*1 2.8e+12 3.8e+26 275 C2 C3 PHTX DST Java Movie Poor Event

2019/08/28 09:48:05 226 84 167 172 187 0.4^*1 2.6e+14 3.7e+28 229 C2 C3 PHTX DST Java Movie Very Poor Event

2019/08/29 21:12:10 277 24 139 98 0 -8.1^*1 2.1e+13 2.0e+27 274 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
2019/08/01	20:56:52	231	11	273	550	2373	233.8^*1	----	----	230	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2019/08/04	12:00:05	228	30	48	59	120	0.6^*1	8.0e+13	9.3e+26	228	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/04	16:00:05	277	12	179	193	319	3.4^*1	----	----	276	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/04	17:36:05	273	37	431	360	136	-9.1^*1	6.9e+13	6.4e+28	274	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/05	02:12:05	275	13	154	85	0	-17.3^*1	----	----	273	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/05	03:12:11	75	23	325	222	0	-103.3^*1	4.9e+12^*2	2.6e+27^*2	77	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2019/08/05	19:24:05	223	16	223	261	375	4.6^*1	----	----	226	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/05	22:18:05	230	8	357	387	437	3.7^*1	----	----	232	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/06	01:36:05	252	68	554	645	727	15.4^*1	1.4e+14	2.2e+29	252	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/06	04:12:05	250	55	164	186	292	2.8^*1	1.1e+14	1.5e+28	244	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/06	11:48:05	244	87	333	377	450	5.1^*1	1.3e+14	7.1e+28	236	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/06	21:48:05	263	36	248	176	0	-14.6^*1	2.1e+13	6.5e+27	272	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/07	00:12:05	234	8	451	450	446	-0.3^*1	----	----	231	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/07	05:12:05	252	12	388	462	571	9.6^*1	----	----	252	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/09	15:29:55	81	70	152	274	309	3.9^*1	3.4e+13	4.0e+27	79	C2 C3 PHTX DST Java Movie
2019/08/10	12:36:05	79	13	88	118	261	2.9^*1	----	----	81	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/11	19:48:06	54	35	169	155	0	-2.1^*1	7.9e+12	1.1e+27	52	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/12	21:12:09	75	37	224	468	406	7.1	2.2e+15	5.4e+29	80	C2 C3 PHTX DST Java Movie
2019/08/13	15:24:05	79	39	243	261	308	1.9^*1	9.4e+13	2.8e+28	79	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/14	15:37:37	215	8	533	475	0	-45.1^*1	----	----	218	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2019/08/16	08:36:06	259	8	278	279	306	0.7^*1	----	----	260	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2019/08/19	04:00:05	259	36	226	301	733	21.9^*1	1.2e+13	3.0e+27	252	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2019/08/19	08:12:05	69	9	250	329	428	6.8^*1	----	----	76	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/20	08:12:05	56	5	375	462	958	34.3^*1	----	----	62	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2019/08/21	01:25:43	53	12	373	377	410	1.4^*1	----	----	64	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/22	19:00:05	245	11	254	302	784	23.7^*1	----	----	246	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2019/08/25	00:12:05	90	50	132	197	503	11.8^*1	5.4e+13	4.7e+27	97	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/25	01:36:15	271	10	236	185	0	-4.7^*1	----	----	269	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/27	10:00:05	283	39	158	260	428	7.6^*1	4.9e+14	6.1e+28	279	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/27	21:24:05	274	27	166	201	280	2.7^*1	2.8e+12	3.8e+26	275	C2 C3 PHTX DST Java Movie	Poor Event
2019/08/28	09:48:05	226	84	167	172	187	0.4^*1	2.6e+14	3.7e+28	229	C2 C3 PHTX DST Java Movie	Very Poor Event
2019/08/29	21:12:10	277	24	139	98	0	-8.1^*1	2.1e+13	2.0e+27	274	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).