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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-05-28T09:23Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2026-05-28T09:23:00-CME-001 (version 1)
Note Keyword:
FF: Event fails/disappears before exiting COR2
SB: Streamer Blowout following CME
Source Signature Keyword:
DIM: Dimming
Morphology Keyword:
O: Other
Note: Faint CME visible well to the E in STEREO A COR, and as a faint partial halo in SOHO LASCO C2/C3 and GOES CCOR-1 comprised of multiple overlapping features, clearly a complex structure. This front may be related to a slow, faint dimming in SDO AIA 193 as early as 2026-05-28T01:57Z centered around S33E28 south of AR 14436 (S16E29), which is more directly attributed to earlier CME: 2026-05-28T03:38Z but this front at T9:23Z resembles more of streamer blowout and could simply be outflow following from that first signature. No distinct eruptive activity is seen relating to this start time.
Version 1 submitted on 2026-05-28T16:52Z by Tony Iampietro
No Notification has been sent for this activity yet.
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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 |
|
CME Analysis
|
M2M_CATALOG |
LE
|
true |
SWPC_CAT |
-14.0 |
-16.0 |
342.0 |
S |
31.0 |
2026-05-28T19:11Z |
Triangulation between STEREO A COR2 with good confidence in fit and leading edge, and SOHO LASCO C2/C3 with less confidence due to the leading edge being difficult to follow and appearing much less wide than COR2. The COR2 perspective is used for the width. |
1: Result 1 (2.0 AU)
Earth = 2026-05-31T22:00Z
Europa Clipper = 2026-06-03T03:00Z
OSIRIS-APEX = 2026-06-01T22:00Z
2: Result 2 (2.0 AU)
Earth = 2026-05-31T12:00Z
Europa Clipper = 2026-06-02T23:00Z
OSIRIS-APEX = 2026-06-01T08:00Z
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2026-05-28T15:46Z |
Tony Iampietro on 2026-05-28T16:56Z |
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