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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-20T12:38Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2026-03-20T12:38:00-CME-001 (version 2)
Note Keyword:
HAL: Halo CME
Source Signature Keyword:
Morphology Keyword:
FS: Flux Rope and Shock Candidate
Note: Partial halo CME visible in SOHO LASCO C2/C3 and GOES CCOR-1 imagery. The CME is also visible to the west in STEREO A COR2 imagery. The source is likely farsided. 
Version 1 submitted on 2026-03-20T17:00Z by Mary Aronne
Version 2 submitted on 2026-03-20T19:30Z by Carina Alden
A Notification with ID 20260320-AL-002 was sent on 2026-03-20T18:59Z

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 -170.0 -2.0 1095.0 O 42.0 2026-03-20T16:01Z Preliminary analysis based on the best fit between STEREO A COR2, SOHO LASCO C2/C3, and GOES CCOR-1 imagery in SWPC_CAT. 1: Result 1 (2.0 AU)
Solar Orbiter = 2026-03-21T10:16Z
2: Result 2 (2.0 AU)
Solar Orbiter = 2026-03-21T10:15Z
Mars = 2026-03-25T14:00Z
Psyche = 2026-03-26T02:00Z
2026-03-20T16:58Z Mary Aronne on 2026-03-20T17:01Z



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