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DONKI: View SW Activity
Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2025-12-18T11:00Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
STEREO A: SECCHI/COR2
GOES: CCOR-1
Activity ID: 2025-12-18T11:00:00-CME-001 (version 1)
Note Keyword:
COL: Possible collision with previous CME
FOV: Front Bright front; may be evidence of pileup
OFL: Outflowing material at the back of the CME
OVR: Event partially overlaps with another CME
Source Signature Keyword:
OFL: Moving/Opening field lines
Morphology Keyword:
F: Flux Rope
Note: Bright, slow CME observed to the SW in SOHO LASCO C2/C3, GOES CCOR-1, and STEREO A COR2, following CME 2025-12-18T03:36Z as the two overlap. The source is likely continued outflow following observed far-sided slow, wide field line loops rising and breaking over the SW limb in SDO AIA 171/193, starting as early as around 2025-12-17T23:00Z and lasting several hours as late as around 2025-12-18T07:00Z. This CME front is likely comprised of several initial CME fronts that appear to collide and travel together as evidenced best in SOHO LASCO C2 imagery.
Version 1 submitted on 2025-12-18T19:32Z 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 |
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CME Analysis
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M2M_CATALOG |
LE
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true |
SWPC_CAT |
135.0 |
-44.0 |
323.0 |
S |
26.0 |
2025-12-18T22:06Z |
Triangulation between SOHO LASCO C3, GOES CCOR-1, and STEREO A COR2, using mostly later frames due to the initial CME evolution being quite distorted in early frames and in LASCO C2, appearing much better developed further into the field-of-view. |
Not modeled
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Tony Iampietro on 2025-12-18T19:34Z |
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