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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-07-18T19:36Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
STEREO A: SECCHI/COR2
Activity ID: 2026-07-18T19:36:00-CME-001 (version 1)
Note Keyword:
Faint: Faint event; may affect type assignment
OVR: Event partially overlaps with another CME
Source Signature Keyword:
BR: Brightening
Morphology Keyword:
O: Other
Note: Faint CME observed to the W in SOHO LASCO C2 and STEREO A COR2, before being overtaken by brighter CME 2026-07-18T20:12Z. The source is not clearly seen separate from the eruption resulting in CME 2026-07-18T20:12Z, but may be a brief brightening in STEREO A EUVI 195/304 near former AR 14482 starting around 2026-07-18T18:45Z, located approximately around W105-W110. 
Version 1 submitted on 2026-07-18T22:32Z by Tony Iampietro
Version 2 submitted on 2026-07-21T20:30Z 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 121.0 -11.0 336.0 S 34.0 2026-07-19T06:18Z This measurement is based on triangulation between SOHO LASCO C2 and STEREO A COR2. 1: Result 1 (2.0 AU)
Mars = 2026-07-24T03:00Z
Psyche = 2026-07-23T18:00Z
2: Result 2 (2.0 AU)
Mars = 2026-07-23T10:00Z
Psyche = 2026-07-23T06:00Z
2026-07-18T22:13Z Mary Aronne on 2026-07-21T19:57Z



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