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
2023-12-12 08:36	191	22°	416	810	5E13 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-12-12 07:24	280	43°	236	—	7E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-12 05:36	277	30°	197	729	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-12 03:36	279	33°	243	388	1E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-11 19:56	118	34°	312	703	7E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-11 18:36	320	13°	261	—	—	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-11 09:12	185	51°	309	487	9E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-11 07:48	274	48°	184	—	1E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-11 06:36	8	40°	197	198	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-10 23:48	10	22°	167	115	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-10 18:00	135	86°	358	847	5E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-10 16:36	9	27°	546	555	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-10 11:24	64	37°	337	—	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
2023-12-10 10:36	163	140°	401	549	3E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Partial Halo
2023-12-10 00:36	354	41°	311	602	3E13 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
2023-12-09 10:24	118	98°	221	814	1E15 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-09 09:36	354	62°	617	559	1E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-09 08:36	237	78°	234	683	9E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-09 04:00	226	58°	182	—	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-09 03:12	3	201°	925	1 055	1E16 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-12-08 23:36	226	54°	163	459	8E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-08 15:24	Halo	360° · halo	628	578	4E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-08 02:47	349	71°	404	558	2E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-08 01:00	226	47°	496	—	2E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-07 19:36	233	186°	451	444	7E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-12-07 17:48	325	28°	189	—	9E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-07 12:25	Halo	360° · halo	632	584	4E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-07 05:12	254	151°	372	376	6E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-12-07 01:48	74	84°	257	296	8E14 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-06 23:24	348	124°	436	494	6E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-12-06 22:12	317	107°	90	—	8E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-06 21:36	320	27°	396	377	4E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-06 17:48	146	29°	230	609	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-06 16:24	60	130°	343	577	5E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-12-06 14:48	164	29°	460	1 416	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-06 09:48	68	14°	329	842	—	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-12-06 07:24	341	51°	199	—	5E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-06 03:00	235	13°	190	495	—	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event
2023-12-06 00:25	321	36°	331	321	1E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-05 22:48	9	83°	501	386	3E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-05 19:48	294	59°	331	230	1E15 g	Fixed the MVI roll angle issue on 2026-01-30
2023-12-05 17:00	308	21°	186	937	3E13 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
2023-12-05 14:48	250	48°	216	82	1E14 g	Fixed the MVI roll angle issue on 2026-01-30; Very Poor Event; Only C2
2023-12-05 08:48	70	65°	91	149	1E15 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-05 06:36	247	179°	573	648	9E15 g	Fixed the MVI roll angle issue on 2026-01-30; Partial Halo
2023-12-05 05:00	70	46°	176	94	1E15 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-05 04:36	272	21°	280	622	6E13 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Only C2
2023-12-04 23:12	240	43°	361	700	2E14 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-04 21:36	208	13°	416	501	—	Fixed the MVI roll angle issue on 2026-01-30; Poor Event
2023-12-04 05:48	108	277°	327	635	1E15 g	Fixed the MVI roll angle issue on 2026-01-30; Poor Event; Partial Halo

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