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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-21T17:00Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
GOES: CCOR-1
Activity ID: 2026-03-21T17:00:00-CME-001 (version 2)
Source Location: S12W45
Active Region Number: 14392
Note Keyword:
Faint: Faint event; may affect type assignment
GAP: Data gap
Source Signature Keyword:
DIM: Dimming
Morphology Keyword:
O: Other
Note: Faint CME observed to the SW in SOHO LASCO C2 and GOES CCOR-1, not visible in LASCO C3 in real time due to a downlink gap. Not observed in available STEREO A COR2 imagery likely due to being directed towards STEREO A. The source is likely a dimming region centered around S12W45 slightly N of AR 14392, observed in GOES SUVI 195 starting around 2026-03-21T15:08Z. 
Version 1 submitted on 2026-03-21T21:59Z by Tony Iampietro
Version 2 submitted on 2026-03-23T16:58Z 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 45.0 -12.0 420.0 S 18.0 2026-03-22T01:18Z 3D analysis with one perspective, using SOHO LASCO C2 and GOES CCOR-1, as STEREO A COR2 does not observe the CME front. 1: Result 1 (2.0 AU)
BepiColombo = 2026-03-23T05:33Z
STEREO A = 2026-03-24T16:00Z (PE: 4.2 h)
Juice = 2026-03-28T10:00Z
OSIRIS-APEX = 2026-03-25T00:00Z
2: Result 2 (5.5 AU)
BepiColombo = 2026-03-23T05:34Z
STEREO A = 2026-03-24T16:00Z (PE: 4.2 h)
Europa Clipper = 2026-03-27T18:00Z
Juice = 2026-03-28T08:00Z
OSIRIS-APEX = 2026-03-25T01:00Z
Tony Iampietro on 2026-03-21T22:04Z



All directly linked activities:
2026-03-24T11:51:00-IPS-001
Location: STEREO A


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