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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-04-30T12:38Z ( STEREO A: SECCHI/COR2 )

All Detecting Spacecrafts:

STEREO A: SECCHI/COR2

SOHO: LASCO/C2

SOHO: LASCO/C3

Activity ID: 2026-04-30T12:38:00-CME-001 (version 3)
Source Location: S30W01

Note Keyword:

Source Signature Keyword:

Morphology Keyword:

F: Flux Rope

Note: Faint, wide CME seen to the south-southwest in SOHO LASCO C2 and to the southeast more prominently in STEREO A COR2; the source is a likely instability below Active Regions 14427/14428 (~S30), with a slowly varying dimming signature starting after 2026-04-30T10:00Z best viewed in SDO composite imagery, particularly the 304/211/171 Angstrom imager.

Version 1 submitted on 2026-04-30T18:39Z by Chris Stubenrauch
Version 2 submitted on 2026-05-04T15:49Z by Mary Aronne
Version 3 submitted on 2026-05-04T15:49Z 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	7.0	-25.0	236.0	S	37.0	2026-05-01T03:12Z	Leading edge measurement using SOHO C2 before the CME's front disappears before reaching the field of view, the CME is still visible in COR2A until about 17:00Z, so the measurement is able to be taken out to about ten solar radii.	1: Result 1 (2.0 AU) Earth = 2026-05-05T06:00Z (PE: 25.8 h) 2: Result 2 (2.0 AU) Earth = 2026-05-05T04:00Z (PE: 23.8 h)	2026-04-30T18:35Z	Chris Stubenrauch on 2026-04-30T18:40Z

All directly linked activities:

2026-05-04T04:10:00-IPS-001
Location: Earth

2026-05-04T10:00:00-IPS-001
Location: STEREO A

2026-05-04T18:00:00-GST-001
NOAA Kp: 6.33 (2026-05-04T21:00Z)

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