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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-22T16:23Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2026-03-22T16:23:00-CME-001 (version 7)
Note Keyword:
3P: 3-part structure CME
COL: Possible collision with previous CME
DFL: Likely deflection of the event within the FOV
FOV: Front Bright front; may be evidence of pileup
GAP: Data gap
Ha: Bright emission (likely H-alpha emission)
HAL: Halo CME
Source Signature Keyword:
PEA: Post eruption arcade
FIL: Filament eruption
OFL: Moving/Opening field lines
BR: Brightening
DIM: Dimming
EUVW: EUV Wave
Morphology Keyword:
FS: Flux Rope and Shock Candidate
Note: This somewhat asymmetric bright CME is visible to the SE in SOHO LASCO C2/C3 and GOES CCOR-1 coronagraph and for a couple of frames before the usual overnight data gap in STEREO A COR2. Its source is a significant filament eruption with associated brightening/dimming starting around 2026-03-22T15:30Z, followed by high-rising post-eruptive arcades, as seen in GOES SUVI 304/284/195/131 centered around S20E15, south of Active Region 14398, and seen as ejecta and opening of field lines in STEREO A EUV 195/403 on/close to the SE limb. It appears that there may be some SE deflection/directionality to it,. as it erupts and progresses outward in the GOES SUVI 284 field of view. There is a bright bulk front and a wider faint shock front seen in all three coronagraphs. 
Version 1 submitted on 2026-03-22T18:47Z by Carina Alden
Version 2 submitted on 2026-03-22T23:50Z by Anna Chulaki
Version 3 submitted on 2026-03-22T23:51Z by Anna Chulaki
Version 4 submitted on 2026-03-22T23:55Z by Anna Chulaki
Version 5 submitted on 2026-03-22T23:57Z by Anna Chulaki
Version 6 submitted on 2026-03-23T00:39Z by Anna Chulaki
Version 7 submitted on 2026-03-23T02:45Z by Anna Chulaki
A Notification with ID 20260323-AL-001 was sent on 2026-03-23T00:08Z
A Notification with ID 20260323-AL-002 was sent on 2026-03-23T11:11Z

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 -34.0 -36.0 655.0 C 38.0 2026-03-22T21:49Z Final analysis of this CME with later imagery from SOHO LASCO and GOES CCOR-1 and with a few early timestamps of STEREO A COR2 before the routine evening data gap. 1: Result 1 (2.0 AU)
Earth = 2026-03-25T08:55Z
2: Result 2 (5.5 AU)
Earth = 2026-03-25T08:55Z
Anna Chulaki on 2026-03-22T23:38Z
CME Analysis M2M_CATALOG SH true SWPC_CAT -15.0 -26.0 863.0 C 49.0 2026-03-22T20:45Z Analysis of the fainter wider shock front based on the fit with the imagery from SOHO LASCO and STEREO A COR2 coronagraphs, including the early imagery from STEREO A COR2 before the usual evening data gap and fully available SOHO LASCO imagery. 1: Result 1 (2.0 AU)
Earth = 2026-03-24T17:30Z
OSIRIS-APEX = 2026-03-25T01:49Z
BepiColombo = 2026-03-23T18:00Z
Anna Chulaki on 2026-03-22T23:37Z
CME Analysis M2M_CATALOG LE false SWPC_CAT -36.0 -31.0 468.0 S 40.0 2026-03-22T23:43Z PRELIMINARY MEASUREMENT USING FIRST FEW INITIAL FRAMES. Parameters based on best fit using three frames of SOHO LASCO C2 imagery and four frames of STEREO A COR2 and GOES CCOR-1 imagery. 1: Result 1 (2.0 AU)
Earth = 2026-03-25T16:00Z
Carina Alden on 2026-03-22T18:49Z



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