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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-28T12:23Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
GOES: CCOR-1
Activity ID: 2026-03-28T12:23:00-CME-001 (version 2)
Source Location: N15E55
Active Region Number: 14404
Note Keyword:
Source Signature Keyword:
FLR: Flare
OFL: Moving/Opening field lines
BR: Brightening
Morphology Keyword:
Note: CME visible to the NE in STEREO A COR2 and GOES CCOR-1. Not initially visible in SOHO LASCO C2/C3 imagery in real time due to a data gap. The potential source is a C4.1 flare starting at 2026-03-28T11:18Z from Active Region 14404 (approximately N15E55). The eruption can be best seen as brightening and opening field lines in GOES SUVI 195 imagery. Opening field lines are also visible in GOES SUVI 284 imagery. The eruption is visible beyond the NE limb in STEREO A EUV 195 imagery. 
Version 1 submitted on 2026-03-28T14:51Z by Mary Aronne
Version 2 submitted on 2026-03-28T18:44Z by Elizabeth Juelfs
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 -56.0 22.0 926.0 C 12.0 2026-03-28T15:51Z Measurement based on the best fit between SOHO LASCO C2/C3 and STEREO A COR2 imagery in SWPC_CAT. 1: Result 1 (2.0 AU)
Mary Aronne on 2026-03-28T15:35Z
CME Analysis M2M_CATALOG LE false SWPC_CAT -60.0 23.0 844.0 C 12.0 2026-03-28T16:08Z Preliminary measurement based on limited available STEREO A COR2 and GOES CCOR-1 imagery. Not modeled Mary Aronne on 2026-03-28T14:51Z



All directly linked activities:
2026-03-28T11:18:00-FLR-001
FLR Type: C4.1


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