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DONKI: View SW Activity
Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-03-21T21:36Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
STEREO A: SECCHI/COR2
GOES: CCOR-1
Activity ID: 2026-03-21T21:36:00-CME-001 (version 1)
Note Keyword:
Faint: Faint event; may affect type assignment
OFL: Outflowing material at the back of the CME
Source Signature Keyword:
OFL: Moving/Opening field lines
BR: Brightening
DIM: Dimming
Morphology Keyword:
Note: Semi-faint CME visible to the S/SE in SOHO LASCO C2/C3, GOES CCOR-1 and to the SE in STEREO A COR2 imagery. The source of this CME appears to be a slow moving/opening of field lines and dimming/brightening in the SE quadrant of the Earth-facing disk starting around 2026-03-21T18:30Z as seen in GOES SUVI 195, 304, and 284 centered around S45E30. There is a second eruption visible near S60W50 which may contribute to overlapping features in the outflowing part at the back of the CME starting around 2026-03-22T00:30Z as seen in GOES SUVI 304 and 195.
Version 1 submitted on 2026-03-22T18:14Z by Carina Alden
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 |
SH
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true |
SWPC_CAT |
-15.0 |
-39.0 |
248.0 |
S |
36.0 |
2026-03-22T16:08Z |
Parameters based on best fit using SOHO LASCO C3 and STEREO A COR2 imagery of the possible shock front of this CME. It is unclear if this is a shock or a fainter CME following the same path ahead of the brighter leading edge measurement. |
1: Result 1 (2.0 AU)
Earth = 2026-03-27T00:00Z
OSIRIS-APEX = 2026-03-26T14:00Z
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Carina Alden on 2026-03-22T18:15Z |
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CME Analysis
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M2M_CATALOG |
LE
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true |
SWPC_CAT |
-15.0 |
-46.0 |
201.0 |
S |
33.0 |
2026-03-22T20:15Z |
Parameters based on best fit of brighter portion of CME as seen in SOHO LASCO C3 and STEREO A COR2 imagery. There is some uncertainty with this CME as to whether this is a separate event or associated with the same eruption. |
Not modeled
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Carina Alden on 2026-03-22T18:17Z |
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All directly linked activities: |
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