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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-05-18T22:00Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2026-05-18T22:00:00-CME-001 (version 1)
Note Keyword:
DPL: CME exhibits dimpled front
Faint: Faint event; may affect type assignment
GAP: Data gap
Source Signature Keyword:
OFL: Moving/Opening field lines
Morphology Keyword:
O: Other
Note: Faint but fast CME with a dimpled, unclear front seen to the E in SOHO LASCO C2/C3 and GOES CCOR-1 coronagraphs but fully covered by the night-time data gap in STEREO A COR2. The source of it is clearly far-sided, as indicated by a minor but clear movement/opening of field lines seen behind the E limb only in GOES SUVI 195 starting at 2026-05-18T21:05Z. 
Version 1 submitted on 2026-05-19T01:08Z by Anna Chulaki
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 3.0 594.0 C 10.0 2026-05-19T03:57Z The CME is fully covered by the night-time data gap in STEREO A COR2 coronagraph and its far-sided source is behind the east limb, as indicated by the opening of field lines seen in GOES SUVI 195. Only plane-of-sky analysis can be done. Not modeled Anna Chulaki on 2026-05-19T01:10Z



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