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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2025-09-04T20:12Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
Activity ID: 2025-09-04T20:12:00-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:
L: Loop
Note: Faint and narrow CME seen to the W in SOHO LASCO C2 only. Not visible in SOHO LASCO C3 or GOES CCOR-1 due to faintness of event. Not visible in STEREO A COR2 due to a data gap which lasted from 2025-09-04T17:53Z to 2025-09-04T22:08Z. The source may be a small eruption seen as field line movement and possibly a small amount of ejecta emerging from just beyond the W limb, seen starting as early as 2025-09-04T19:27Z at an apparent latitude of N10 in SDO AIA 171/304. 
Version 1 submitted on 2025-09-05T22:21Z by Hannah Hermann
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 5.0 289.0 S 14.0 2025-09-05T08:50Z Plane-of-sky measurement using the three frames of SOHO LASCO C2 in which the CME is visible. Not modeled Hannah Hermann on 2025-09-05T22:23Z



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