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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-04-17T02:30Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
Activity ID: 2026-04-17T02:30:00-CME-001 (version 3)
Source Location: S17E41
Note Keyword:
GAP: Data gap
OFL: Outflowing material at the back of the CME
OVR: Event partially overlaps with another CME
SB: Streamer Blowout following CME
CHP: CME - Coronal Hole Proximity
Source Signature Keyword:
DFLR: Double ribbon flare
OFL: Moving/Opening field lines
DIM: Dimming
Morphology Keyword:
Note: Slow, wide CME to the SE in GOES CCOR-1 and STEREO A COR2, not visible in SOHO LASCO C2/C3 due to a downlink gap. The source for this CME is likely a diffuse, very slow dimming, spanning a filament channel approximately ~S26E58 to ~S08E25 (center S17E41), observed starting around 2026-04-16T21:30Z and lasting 12+ hours in SDO AIA 171/193/304 as the dimming, field line movement, and double ribbon flare, but not observing the filament itself actually leaving the disk. A bright inner core follows the initial front likely from this same source, measuring ~210 km/s at S16E52 with a half-width 27 degrees. Partially overlaps with following CME: 2026-04-17T07:53Z.
Version 1 submitted on 2026-04-17T13:07Z by Tony Iampietro
Version 2 submitted on 2026-04-17T15:51Z by Tony Iampietro
Version 3 submitted on 2026-04-17T17:42Z by Tony Iampietro
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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 |
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CME Analysis
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M2M_CATALOG |
LE
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true |
SWPC_CAT |
-48.0 |
-17.0 |
260.0 |
S |
24.0 |
2026-04-17T14:40Z |
GOES CCOR-1 and STEREO A COR2 triangulation, tracking the front direction with a bit of discrepancy on the width between the two coronagraphs (COR2A's view is used for the width). |
1: Result 1 (2.0 AU)
Earth = 2026-04-20T18:00Z
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Tony Iampietro on 2026-04-17T13:09Z |
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