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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-01-04T21:12Z ( SOHO: LASCO/C2 )

All Detecting Spacecrafts:

SOHO: LASCO/C2

Activity ID: 2026-01-04T21:12:00-CME-001 (version 3)

Note Keyword:

Faint: Faint event; may affect type assignment

FF: Event fails/disappears before exiting COR2

Source Signature Keyword:

OFL: Moving/Opening field lines

Morphology Keyword:

Note: Very faint CME first seen to the SE by SOHO LASCO C2 beginning at 2026-01-04T21:12Z. This CME fades before exiting the field of view in C2 and is therefore not seen in any other coronagraphs. The source of this event is likely some minor field line movement seen along the SE limb in SDO AIA 171 in ISWA starting around 2026-01-04T21:00Z.

Version 1 submitted on 2026-01-05T00:11Z by Melissa Kane
Version 2 submitted on 2026-01-07T12:54Z by Mary Aronne
Version 3 submitted on 2026-01-07T12:55Z by Mary Aronne

No Notification has been sent for this activity yet.

The List of CME Analysis already entered:

Event Type	Catalog	Measurement TypeCME measurement type: Leading Edge (LE), Shock Front (SH), Right Hand Boundary (RHB), Left Hand Boundary (LHB), Black/White Boundary (BW), Prominence Core (COR), Disconnection Front (DIS), Trailing Edge (TE).	Prime?"primary flag" which is either True or False. If there are multiple CME analysis entries for a single CME, this flag would indicate which analysis is considered most accurate per measurement type. This is a helpful flag if you would like to download only one most accurate CME analysis per CME per Measurement Type	Technique	Long	Lat	Speed	Type	Half Width	Time 21.5	Note	WSA-ENLIL+Cone Result(s)	Measured On	Submitted By
CME Analysis	M2M_CATALOG	LE	true	Plane-of-sky	NONE	-40.0	367.0	S	12.0	2026-01-05T06:56Z	Plane-of-sky measurement using a longitude of E90 due to lack of visible coronagraph imagery and source near the limb.	Not modeled		Melissa Kane on 2026-01-05T00:12Z

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