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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-05-16T03:00Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
STEREO A: SECCHI/COR2
GOES: CCOR-1
Activity ID: 2026-05-16T03:00:00-CME-001 (version 2)
Note Keyword:
Faint: Faint event; may affect type assignment
OFL: Outflowing material at the back of the CME
OVR: Event partially overlaps with another CME
PRM: Prominence material (filamentary structures)
Source Signature Keyword:
FIL: Filament eruption
OFL: Moving/Opening field lines
Morphology Keyword:
O: Other
Note: Faint CME observed to the SE in SOHO LASCO C2/C3 and GOES CCOR-1, and SW in STEREO A COR2, quickly overlapping CME: 2026-05-16T01:48Z. This CME is comprised of numerous following fronts of similar structure that blend together in the field-of-view and may merge, this entry follows the leading edge of the eruptive activity and encompasses it all. The source is likely a far-sided weak filament eruption, observed over STEREO A's west limb starting when STEREO A EUVI 304 returns from a data gap at 2026-05-16T02:15Z, and lasting as late as 2026-05-16T07:15Z. Also observed as very faint GOES SUVI 284 field line movement over its S limb as early as 2026-05-15T20:00Z, which may or may not be related to this slow eruption.
Version 1 submitted on 2026-05-16T20:11Z by Tony Iampietro
Version 2 submitted on 2026-05-19T13:35Z by Mary Aronne
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 |
-166.0 |
-28.0 |
375.0 |
S |
40.0 |
2026-05-16T12:07Z |
Triangulation between SOHO LASCO C2 and STEREO A COR2, following the leadingmost edge of what is observed as numerous outflowing, similar fronts. |
1: Result 1 (2.0 AU)
BepiColombo = 2026-05-17T08:55Z
Solar Orbiter = 2026-05-19T10:00Z
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Tony Iampietro on 2026-05-16T20:12Z |
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