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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-18T17:24Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
GOES: CCOR-1
Activity ID: 2026-03-18T17:24:00-CME-001 (version 2)
Note Keyword:
Faint: Faint event; may affect type assignment
GAP: Data gap
Source Signature Keyword:
Morphology Keyword:
Note: Faint CME first seen to the NNE in SOHO LASCO C2 starting around 2026-03-18T17:24Z. It is also seen to the NNE in GOES CCOR-1 for a couple frames but dissipates before leaving the FOV of SOHO LASCO C2. It is covered by a real-time data gap in STEREO A COR2. The source is possibly related to a very small eruption best seen in GOES SUVI 284 at approximately N34E65 starting around 2026-03-18T16:52Z, but measurement indicates that this source candidate is unlikely. 
Version 1 submitted on 2026-03-18T23:23Z by Elizabeth Juelfs
Version 2 submitted on 2026-03-23T16:06Z by Mary Aronne
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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 68.0 277.0 S 25.0 2026-03-19T06:20Z Plane-of-sky measurement chosen due to significant source uncertainty. Not modeled Elizabeth Juelfs on 2026-03-18T23:24Z



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