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

2018/05/01 11:24:05 301 5 306 428 1420 82.5^*1 ---- ---- 299 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/01 13:25:40 183 3 860 492 0 -553.3^*1 ---- ---- 182 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/05/01 21:12:11 102 24 270 164 0 -29.0^*1 3.0e+13 1.1e+28 108 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/03 12:00:05 86 15 198 280 618 15.3^*1 ---- ---- 86 C2 C3 PHTX DST Java Movie Very Poor Event

2018/05/03 13:25:40 288 12 303 229 0 -34.1^*1 ---- ---- 279 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/05/03 17:00:05 129 302 533 397 0 -22.1^*1 2.2e+15^*2 3.1e+30^*2 101 C2 C3 PHTX DST Java Movie Partial Halo

2018/05/04 22:36:05 84 17 263 297 568 12.1^*1 ---- ---- 85 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/05 14:24:05 266 21 243 232 0 -3.7^*1 7.6e+12 2.2e+27 267 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/06 04:12:05 43 9 257 267 401 4.2^*1 ---- ---- 53 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/07 01:48:05 285 15 205 291 855 33.7^*1 ---- ---- 289 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/07 22:00:05 78 28 147 115 0 -6.3^*1 8.9e+13 9.6e+27 83 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/07 22:00:05 276 38 355 491 569 12.5^*1 2.1e+13 1.3e+28 277 C2 C3 PHTX DST Java Movie

2018/05/08 02:24:05 93 14 95 107 355 5.0^*1 ---- ---- 100 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/09 17:42:05 251 19 562 554 550 -1.2^*1 ---- ---- 246 C2 C3 PHTX DST Java Movie Poor Event; Only C3

2018/05/09 21:20:25 246 34 700 692 657 -3.6^*1 5.4e+13 1.3e+29 252 C2 C3 PHTX DST Java Movie Poor Event; Only C3

2018/05/10 03:24:05 285 9 369 512 1186 58.5^*1 ---- ---- 288 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/05/10 11:48:05 102 13 211 229 307 2.8^*1 ---- ---- 106 C2 C3 PHTX DST Java Movie Poor Event

2018/05/11 01:24:06 1 9 620 518 0 -99.4^*1 ---- ---- 360 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/05/11 16:00:07 244 11 290 280 255 -1.0^*1 ---- ---- 241 C2 C3 PHTX DST Java Movie Poor Event

2018/05/12 08:48:05 74 15 139 277 1706 122.3^*1 ---- ---- 79 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/05/14 06:48:05 10 15 652 585 0 -94.0^*1 ---- ---- 10 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/05/14 18:12:05 270 38 102 105 143 0.5^*1 2.1e+14 1.1e+28 273 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/15 11:06:05 271 6 293 345 458 7.5^*1 ---- ---- 272 C2 C3 PHTX DST Java Movie Poor Event; Only C3

2018/05/16 14:24:06 99 25 56 0 0 -8.6^*1 1.9e+13 2.9e+26 98 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/18 05:42:05 257 33 250 364 407 7.8^*1 1.3e+15 4.0e+29 256 C2 C3 PHTX DST Java Movie Only C3

2018/05/19 08:24:06 76 55 146 151 157 0.2^*1 9.7e+14 1.0e+29 76 C2 C3 PHTX DST Java Movie Poor Event

2018/05/19 19:00:06 88 52 326 428 987 40.3^*1 3.0e+13 1.6e+28 78 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/05/20 04:48:05 113 14 244 287 655 16.3^*1 ---- ---- 113 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/20 06:24:05 272 38 85 95 175 1.0^*1 3.8e+14 1.4e+28 273 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/05/20 07:24:06 77 14 197 254 530 11.1^*1 ---- ---- 76 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/21 03:06:06 85 28 341 335 319 -0.9^*1 1.2e+14 6.9e+28 85 C2 C3 PHTX DST Java Movie Very Poor Event; Only C3

2018/05/21 09:06:05 89 26 468 422 0 -13.4^*1 6.9e+13 7.5e+28 87 C2 C3 PHTX DST Java Movie Poor Event; Only C3

2018/05/22 15:36:05 281 24 85 61 0 -3.4^*1 1.8e+14 6.5e+27 277 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/23 10:00:05 79 35 59 63 139 0.7^*1 4.6e+13 8.0e+26 78 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/25 13:25:40 43 14 1101 984 0 -176.4^*1 ---- ---- 49 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/05/25 21:36:05 94 339 167 166 151 -0.2^*1 3.8e+14^*2 5.3e+28^*2 272 C2 C3 PHTX DST Java Movie Very Poor Event; Partial Halo

2018/05/26 05:18:05 263 11 272 207 0 -10.8^*1 ---- ---- 252 C2 C3 PHTX DST Java Movie Very Poor Event; Only C3

2018/05/27 00:12:05 97 32 217 108 0 -28.5^*1 4.3e+13 1.0e+28 97 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/27 01:25:42 0 9 643 701 1536 88.2^*1 ---- ---- 1 C2 C3 PHTX DST Java Movie Very Poor Event; Only 3 points; Only C2

2018/05/27 06:12:05 99 25 227 208 0 -7.5^*1 2.0e+13 5.0e+27 100 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/27 22:00:06 52 11 476 607 1719 120.5^*1 ---- ---- 56 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/28 11:24:06 94 37 199 263 792 25.4^*1 4.7e+13 9.2e+27 96 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/28 12:48:05 34 7 600 1145 2623 285.0^*1 ---- ---- 41 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/28 17:00:05 88 35 69 85 189 1.4^*1 6.3e+12 1.5e+26 91 C2 C3 PHTX DST Java Movie Poor Event; Only C2

2018/05/30 03:24:05 88 62 184 200 232 1.1^*1 7.8e+14 1.3e+29 91 C2 C3 PHTX DST Java Movie

2018/05/31 12:36:05 263 29 246 387 1053 46.4^*1 1.4e+13 4.2e+27 263 C2 C3 PHTX DST Java Movie Very Poor Event; Only C2

2018/05/31 14:00:05 90 67 278 153 0 -9.6^*1 1.1e+15 4.3e+29 85 C2 C3 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
2018/05/01	11:24:05	301	5	306	428	1420	82.5^*1	----	----	299	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/01	13:25:40	183	3	860	492	0	-553.3^*1	----	----	182	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/05/01	21:12:11	102	24	270	164	0	-29.0^*1	3.0e+13	1.1e+28	108	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/03	12:00:05	86	15	198	280	618	15.3^*1	----	----	86	C2 C3 PHTX DST Java Movie	Very Poor Event
2018/05/03	13:25:40	288	12	303	229	0	-34.1^*1	----	----	279	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/05/03	17:00:05	129	302	533	397	0	-22.1^*1	2.2e+15^*2	3.1e+30^*2	101	C2 C3 PHTX DST Java Movie	Partial Halo
2018/05/04	22:36:05	84	17	263	297	568	12.1^*1	----	----	85	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/05	14:24:05	266	21	243	232	0	-3.7^*1	7.6e+12	2.2e+27	267	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/06	04:12:05	43	9	257	267	401	4.2^*1	----	----	53	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/07	01:48:05	285	15	205	291	855	33.7^*1	----	----	289	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/07	22:00:05	78	28	147	115	0	-6.3^*1	8.9e+13	9.6e+27	83	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/07	22:00:05	276	38	355	491	569	12.5^*1	2.1e+13	1.3e+28	277	C2 C3 PHTX DST Java Movie
2018/05/08	02:24:05	93	14	95	107	355	5.0^*1	----	----	100	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/09	17:42:05	251	19	562	554	550	-1.2^*1	----	----	246	C2 C3 PHTX DST Java Movie	Poor Event; Only C3
2018/05/09	21:20:25	246	34	700	692	657	-3.6^*1	5.4e+13	1.3e+29	252	C2 C3 PHTX DST Java Movie	Poor Event; Only C3
2018/05/10	03:24:05	285	9	369	512	1186	58.5^*1	----	----	288	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/05/10	11:48:05	102	13	211	229	307	2.8^*1	----	----	106	C2 C3 PHTX DST Java Movie	Poor Event
2018/05/11	01:24:06	1	9	620	518	0	-99.4^*1	----	----	360	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/05/11	16:00:07	244	11	290	280	255	-1.0^*1	----	----	241	C2 C3 PHTX DST Java Movie	Poor Event
2018/05/12	08:48:05	74	15	139	277	1706	122.3^*1	----	----	79	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/05/14	06:48:05	10	15	652	585	0	-94.0^*1	----	----	10	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/05/14	18:12:05	270	38	102	105	143	0.5^*1	2.1e+14	1.1e+28	273	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/15	11:06:05	271	6	293	345	458	7.5^*1	----	----	272	C2 C3 PHTX DST Java Movie	Poor Event; Only C3
2018/05/16	14:24:06	99	25	56	0	0	-8.6^*1	1.9e+13	2.9e+26	98	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/18	05:42:05	257	33	250	364	407	7.8^*1	1.3e+15	4.0e+29	256	C2 C3 PHTX DST Java Movie	Only C3
2018/05/19	08:24:06	76	55	146	151	157	0.2^*1	9.7e+14	1.0e+29	76	C2 C3 PHTX DST Java Movie	Poor Event
2018/05/19	19:00:06	88	52	326	428	987	40.3^*1	3.0e+13	1.6e+28	78	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/05/20	04:48:05	113	14	244	287	655	16.3^*1	----	----	113	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/20	06:24:05	272	38	85	95	175	1.0^*1	3.8e+14	1.4e+28	273	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/05/20	07:24:06	77	14	197	254	530	11.1^*1	----	----	76	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/21	03:06:06	85	28	341	335	319	-0.9^*1	1.2e+14	6.9e+28	85	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C3
2018/05/21	09:06:05	89	26	468	422	0	-13.4^*1	6.9e+13	7.5e+28	87	C2 C3 PHTX DST Java Movie	Poor Event; Only C3
2018/05/22	15:36:05	281	24	85	61	0	-3.4^*1	1.8e+14	6.5e+27	277	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/23	10:00:05	79	35	59	63	139	0.7^*1	4.6e+13	8.0e+26	78	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/25	13:25:40	43	14	1101	984	0	-176.4^*1	----	----	49	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/05/25	21:36:05	94	339	167	166	151	-0.2^*1	3.8e+14^*2	5.3e+28^*2	272	C2 C3 PHTX DST Java Movie	Very Poor Event; Partial Halo
2018/05/26	05:18:05	263	11	272	207	0	-10.8^*1	----	----	252	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C3
2018/05/27	00:12:05	97	32	217	108	0	-28.5^*1	4.3e+13	1.0e+28	97	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/27	01:25:42	0	9	643	701	1536	88.2^*1	----	----	1	C2 C3 PHTX DST Java Movie	Very Poor Event; Only 3 points; Only C2
2018/05/27	06:12:05	99	25	227	208	0	-7.5^*1	2.0e+13	5.0e+27	100	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/27	22:00:06	52	11	476	607	1719	120.5^*1	----	----	56	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/28	11:24:06	94	37	199	263	792	25.4^*1	4.7e+13	9.2e+27	96	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/28	12:48:05	34	7	600	1145	2623	285.0^*1	----	----	41	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/28	17:00:05	88	35	69	85	189	1.4^*1	6.3e+12	1.5e+26	91	C2 C3 PHTX DST Java Movie	Poor Event; Only C2
2018/05/30	03:24:05	88	62	184	200	232	1.1^*1	7.8e+14	1.3e+29	91	C2 C3 PHTX DST Java Movie
2018/05/31	12:36:05	263	29	246	387	1053	46.4^*1	1.4e+13	4.2e+27	263	C2 C3 PHTX DST Java Movie	Very Poor Event; Only C2
2018/05/31	14:00:05	90	67	278	153	0	-9.6^*1	1.1e+15	4.3e+29	85	C2 C3 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).