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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-17T16:53Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
SOHO: LASCO/C2
Activity ID: 2026-03-17T16:53:00-CME-001 (version 1)
Note Keyword:
DFL: Likely deflection of the event within the FOV
Faint: Faint event; may affect type assignment
Source Signature Keyword:
Morphology Keyword:
O: Other
Note: Faint, less than 10 degree half-width CME, observed best to the E in STEREO A COR2 and faintly to the W in SOHO LASCO C2, before fading and not visible in LASCO C3 and GOES CCOR-1. No on-disk source is observed, with the analysis triangulating to S07W23, decently far from the more active AR 14392 (S16E06) for any potential deflection. 
Version 1 submitted on 2026-03-17T22:36Z by Tony Iampietro
A Notification with ID 20260318-AL-001 was sent on 2026-03-18T00:25Z

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 SWPC_CAT 23.0 -7.0 508.0 C 10.0 2026-03-17T22:53Z Triangulation between STEREO A COR2 and faint frames of the front in SOHO LASCO C2. CME half width is less than 10 degrees, perhaps around 5 degrees, limited by the 10 degree half-width minimum in swpc_cat. 1: Result 1 (2.0 AU)
BepiColombo = 2026-03-18T20:00Z
OSIRIS-APEX = 2026-03-21T04:00Z
2: Result 2 (5.5 AU)
BepiColombo = 2026-03-18T20:00Z
OSIRIS-APEX = 2026-03-21T04:00Z
Tony Iampietro on 2026-03-17T22:37Z



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