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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-07-21T06:23Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2026-07-21T06:23:00-CME-001 (version 1)
Note Keyword:
HAL: Halo CME
Source Signature Keyword:
OFL: Moving/Opening field lines
Morphology Keyword:
Note: CME first seen to the WNW in STEREO A COR2 starting at 2026-07-21T06:23Z. It is also seen to the NW in SOH0 LASCO C2/C3 and GOES CCOR-1 but is largely obscured by the pylon in SOHO LASCO C3 and GOES CCOR-1. There is a larger shock feature that appears as a halo in SOHO LASCO C2/C3 and GOES CCOR-1. The source of this CME is most likely wide opening field lines seen near the W limb in STEREO A EUVI 195 beginning around 2026-07-21T05:55Z.
Version 1 submitted on 2026-07-21T12:20Z by Elizabeth Juelfs
	
A Notification with ID 20260721-AL-003 was sent on 2026-07-21T15:35Z

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 148.0 22.0 658.0 C 25.0 2026-07-21T11:28Z Measurement of brightest, densest part of the leading edge based on best fit among SOHO LASCO C2, GOES CCOR-1, and STEREO A COR2. 1: Result 1 (2.0 AU)
Psyche = 2026-07-26T18:00Z
2: Result 2 (5.5 AU)
Psyche = 2026-07-26T18:00Z
Tony Iampietro on 2026-07-21T13:36Z
CME Analysis M2M_CATALOG SH true SWPC_CAT 177.0 9.0 881.0 C 49.0 2026-07-21T10:03Z Shock front triangulation between SOHO LASCO C2/C3 and STEREO A COR2. 1: Result 1 (2.0 AU)
Psyche = 2026-07-26T12:00Z
Solar Orbiter = 2026-07-23T07:00Z
2026-07-21T13:33Z Tony Iampietro on 2026-07-21T13:36Z



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