Sun · coronagraph

Billions of tonnes of plasma

The 36 CMEs of the last days of the catalogue (up to 2026-08-31), replayed as the LASCO C3 coronagraph sees them: each leaves at its position angle, with its width and a speed proportional to its measured speed. A full halo means an ejection aimed at the Earth or directly away from it.

First C2 image: —
Linear speed: —
Width · angle: —

< 500 km/s
500–1000 km/s
≥ 1000 km/s

Latest CME in the catalogue

550 km/s

2026-08-31 05:24 UTC

52°

Fastest since 1996

3,387 km/s

2004-11-10

Full halos

1,035

1996 → 2026

SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26

Schematic: occulting disk ≈ 3 solar radii, field ≈ 13 solar radii. Compressed time, relative speeds kept. Positions and widths from the CDAW catalogue (SOHO/LASCO, manual measurements).

Catalogued CMEs

43,558

1996 → 2026-08-31

SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26 Current · provisional

CMEs over 12 months

1,829

up to 2026-08-31 (end of the catalogue)

SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26 Current · provisional

Full halos

1,035

360° width: towards the Earth or away from it

SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26 Current · provisional

CMEs ≥ 1000 km/s

1,037

of which 416 full halos

SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26 Current · provisional

CMEs detected per year since 1996 SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26 Current · provisional

Show the data as a table

Number of CMEs per calendar year in the CDAW SOHO/LASCO catalogue. The count follows the solar cycle but also depends on the image cadence and the observers’ choices (more small events after 2010). 1998 and 1999 are incomplete (loss of SOHO).

Full halos and fast CMEs per year SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26 Current · provisional

Show the data as a table

Full halos (360° apparent width), CMEs with a linear speed ≥ 1000 km/s, and fast halos: they cause most of the large geomagnetic storms.

The ten fastest CMEs of the catalogue

#	First C2 image (UTC)	Speed (km/s)	Position angle (°)	Width	Kinetic energy	Remarks
1	2004-11-10 01:26	3 387 km/s	Halo	halo	6E32 erg	—
2	2017-09-10 14:00	3 163 km/s	Halo	halo	2E33 erg	—
3	2005-01-15 22:06	2 861 km/s	Halo	halo	7E32 erg	—
4	2023-12-31 21:00	2 852 km/s	Halo	halo	4E32 erg	Fixed the MVI roll angle issue on 2026-01-30
5	2024-02-12 05:36	2 792 km/s	Halo	halo	6E32 erg	—
6	2024-02-09 12:25	2 782 km/s	Halo	halo	4E32 erg	—
7	2022-09-05 14:36	2 776 km/s	Halo	halo	1E32 erg	Fixed the MVI roll angle issue on 2026-01-30; Only 2 points
8	2012-03-06 23:24	2 684 km/s	Halo	halo	5E32 erg	—
9	2003-11-04 18:54	2 657 km/s	Halo	halo	6E32 erg	Only 3 points
10	2013-05-13 23:25	2 625 km/s	Halo	halo	2E32 erg	—

Linear speed projected on the plane of the sky: the true speed of an Earth-directed halo is higher. Kinetic energy estimated from the mass when it is measured.

CME catalogue SOHO/LASCO CME catalogue (CDAW Data Center) · NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · 10/25/26

Year

Minimum speed

Full halos only

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First C2 image (UTC)	Position angle (°)	Width	Speed (km/s)	Speed at 20 R☉	Mass	Remarks
2023-11-15 05:12	358	228°	662	821	2E16 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-15 03:24	254	62°	567	—	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-15 00:25	19	163°	367	150	2E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-14 22:24	232	130°	669	528	2E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-14 20:24	205	33°	233	817	5E14 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-11-14 14:12	234	34°	529	544	2E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-14 11:48	322	108°	291	260	3E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-14 10:12	230	20°	437	263	1E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-14 04:00	119	31°	216	—	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-11-14 03:00	227	24°	521	445	2E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-13 23:48	271	59°	132	514	2E15 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-13 01:36	85	13°	554	1 214	—	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-11-12 14:37	264	95°	344	464	3E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-12 09:12	290	88°	333	362	4E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-11 22:24	216	48°	178	—	3E14 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
2023-11-11 06:48	298	65°	224	349	4E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-11 04:00	326	47°	306	441	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-10 19:00	250	110°	325	395	8E14 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-11-10 11:00	336	37°	289	235	2E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-10 10:00	268	35°	326	534	1E15 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-11-10 02:12	79	49°	165	204	4E12 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-11-09 19:36	290	79°	134	73	2E15 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-11-09 10:48	Halo	360° · halo	573	509	1E16 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-09 07:12	325	65°	192	228	6E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-08 19:36	319	18°	191	328	—	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-08 18:36	115	16°	132	—	—	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
2023-11-08 17:36	299	11°	339	92	—	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-08 06:24	256	149°	834	807	6E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-07 10:36	112	112°	366	445	2E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-07 08:24	4	9°	259	443	—	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-11-06 06:24	242	133°	588	607	6E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-05 22:12	81	34°	207	917	1E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-11-05 19:00	183	78°	234	—	3E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-05 15:12	50	42°	605	702	2E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-05 06:48	105	90°	420	497	2E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-05 01:48	219	91°	334	474	4E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-04 12:48	72	20°	240	325	3E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-03 19:57	344	133°	291	497	9E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-03 17:48	185	24°	277	643	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-11-03 17:48	244	27°	516	413	5E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-03 09:00	213	141°	477	490	4E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-03 04:24	350	226°	693	698	1E16 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-03 00:36	162	133°	300	552	2E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-02 21:36	277	71°	217	290	2E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-11-02 18:36	90	62°	626	—	4E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-02 04:00	104	125°	411	661	6E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-02 02:12	10	201°	561	645	9E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-11-01 22:24	88	29°	332	—	6E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-01 19:36	92	17°	311	—	—	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-11-01 12:36	77	61°	462	535	2E15 g	Fixed the MVI roll angle issue on 2026-01-30

Method and sources

The catalogue of the CDAW Data Center (NASA GSFC and The Catholic University of America, with the Naval Research Laboratory) lists every CME seen since 1996 by the LASCO C2 and C3 coronagraphs on SOHO. For each: time of the first C2 image, central position angle (measured from solar north towards the east), angular width, linear speed (fit to the measured heights), second-order speeds and speed at 20 solar radii, acceleration, mass and energy when estimated.

The single catalogue file is re-read daily; values marked with an asterisk (few measurement points) are kept as published. Yearly counts are computed from the imported rows.

Reading these data

The catalogue is measured by hand and published several weeks to months behind real time. Speeds are projected on the plane of the sky. A halo is seen all around the disk: it can be heading towards the Earth or away from it (far side). SOHO was lost from June to October 1998 and again in early 1999. The number of small CMEs detected increased with the image cadence.

SOURCES OF THIS PAGE

SOHO/LASCO CME catalogue (CDAW Data Center): Yashiro, S., Gopalswamy, N., et al. (2004). A catalog of white light coronal mass ejections observed by the SOHO spacecraft. JGR 109, A07105; Gopalswamy, N., et al. (2009), Earth Moon Planets 104, 295. The CME catalog is generated and maintained at the CDAW Data Center by NASA and The Catholic University of America in cooperation with the Naval Research Laboratory. SOHO is a project of international cooperation between ESA and NASA. · doi:10.1029/2003JA010282 · source page ↗
Licence : NASA, public domain; acknowledgement requested (CDAW, SOHO is an ESA/NASA project) · retrieved on Oct 25, 2026 · SHA-256 68dcf21033fb…
Yashiro et al. (2004): Yashiro, S., Gopalswamy, N., Michalek, G., St. Cyr, O. C., Plunkett, S. P., Rich, N. B., Howard, R. A. (2004). A catalog of white light coronal mass ejections observed by the SOHO spacecraft. Journal of Geophysical Research 109, A07105. · doi:10.1029/2003JA010282
Licence : Published literature; cited
Gopalswamy et al. (2009): Gopalswamy, N., Yashiro, S., Michalek, G., et al. (2009). The SOHO/LASCO CME Catalog. Earth, Moon, and Planets 104, 295–313. · doi:10.1007/s11038-008-9282-7
Licence : Published literature; cited

Coronal mass ejections SOHO/LASCO catalogue since 1996: speeds, halos, fast CMEs

Billions of tonnes of plasma