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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-05-16T01:48Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
STEREO A: SECCHI/COR2
Activity ID: 2026-05-16T01:48:00-CME-001 (version 3)
Note Keyword:
Faint: Faint event; may affect type assignment
OFL: Outflowing material at the back of the CME
OVR: Event partially overlaps with another CME
Source Signature Keyword:
OFL: Moving/Opening field lines
Morphology Keyword:
O: Other
Note: Faint CME observed to the SE in SOHO LASCO C2 and SW in STEREO A COR2, before it is overtaken by CME: 2026-05-16T03:00Z. No distinct source for this CME is observed, but it is likely far-sided, evidenced by potential field line movement over the GOES SUVI 284 S limb as early as 2026-05-15T20:00Z. 
Version 1 submitted on 2026-05-16T20:02Z by Tony Iampietro
Version 2 submitted on 2026-05-19T13:22Z by Mary Aronne
Version 3 submitted on 2026-05-19T13:23Z 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 SWPC_CAT -165.0 -23.0 306.0 S 34.0 2026-05-16T12:58Z Triangulation between SOHO LASCO C2 and STEREO A COR2, with the few available frames before this front is overtaken by CME: 2026-05-16T03:00Z. 1: Result 1 (2.0 AU)
BepiColombo = 2026-05-17T08:55Z
Solar Orbiter = 2026-05-19T10:00Z
Tony Iampietro on 2026-05-16T20:03Z



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