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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2025-12-13T21:12Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2025-12-13T21:12:00-CME-001 (version 2)
Note Keyword:
Faint: Faint event; may affect type assignment
Source Signature Keyword:
Morphology Keyword:
Note: Faint CME first seen to the SE in SOHO LASCO C2 starting around 2025-12-13T21:12Z part way into the FOV. CME is also seen to the SE in SOHO LASCO C3 and GOES CCOR-1. Not visible in STEREO A COR2 due to a data gap. There is no definitive source for this CME on the Earth-facing disk but could be related to some very minor activity and fluctuation across the SE quadrant visible for several hours prior to the CME start time. This CME is much easier to see in running difference imagery. 
Version 1 submitted on 2025-12-14T00:36Z by Elizabeth Juelfs
Version 2 submitted on 2025-12-15T14:52Z 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 -43.0 427.0 S 23.0 2025-12-14T04:22Z Plane-of-sky measurement chosen due to lack of available coronagraph triangulation and lack of definitive source candidate. Not modeled Mary Aronne on 2025-12-15T14:52Z



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