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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2025-12-17T20:36Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
Activity ID: 2025-12-17T20:36:00-CME-001 (version 1)
Note Keyword:
Faint: Faint event; may affect type assignment
GAP: Data gap
Source Signature Keyword:
OFL: Moving/Opening field lines
Morphology Keyword:
O: Other
Note: Faint CME observed to the SE only in SOHO LASCO C2, and even more faint in LASCO C3; not seen in STEREO A COR2 due to a data gap beginning at 2025-12-17T20:38Z, nor in GOES CCOR-1 likely due to faintness. The source may be weak/slow field line movement observed over the SE limb starting around 2025-12-17T18:15Z in SDO AIA 171, which appears to be far-sided in origin. 
Version 1 submitted on 2025-12-18T12:46Z by Tony Iampietro
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 -43.0 286.0 S 27.0 2025-12-18T09:13Z SOHO LASCO C2/C3 only plane-of-sky due to the uncertain, likely far-sided, source with no STEREO A COR2 to triangulate with. CME front fades after a few C2 frames, and is near unresolvable in later C3 frames. Not modeled Tony Iampietro on 2025-12-18T12:47Z



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