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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-05-25T22:12Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
STEREO A: SECCHI/COR2
GOES: CCOR-1
Activity ID: 2026-05-25T22:12:00-CME-001 (version 2)
Note Keyword:
3P: 3-part structure CME
Ha: Bright emission (likely H-alpha emission)
HAL: Halo CME
OFL: Outflowing material at the back of the CME
PRM: Prominence material (filamentary structures)
SEP: Solar Energetic Particle event
Source Signature Keyword:
FIL: Filament eruption
OFL: Moving/Opening field lines
EUVW: EUV Wave
Morphology Keyword:
FS: Flux Rope and Shock Candidate
Note: Fast, halo CME first seen to the NW by SOHO LASCO C2 beginning at 2026-05-25T22:12Z, as well as by SOHO LASCO C3, STEREO A COR2 and GOES CCOR-1 in later frames. The source of this event is likely a far sided flare seen by the Solar orbiter STIX instrument peaking at approx. 2026-05-25T22:04Z with an estimated peak of M7.3 (potential range of [M4.0,X1.4]). Filament ejecta can also be seen in association with this eruption beyond the NW limb in SDO AIA and GOES SUVI 304 beginning at approx. 2026-05-25T21:57Z, along with wide opening field lines and EUV wave observed in SDO AIA 171, 193 and GOES SUVI 284. This event is also associated with solar energetic particle enhancements at SOHO, GOES and STEREO Ahead.
Version 1 submitted on 2026-05-25T23:19Z by Tony Iampietro
Version 2 submitted on 2026-05-26T15:19Z by Melissa Kane
A Notification with ID
20260526-AL-002 was sent on 2026-05-26T00:24Z
A Notification with ID
20260526-AL-006 was sent on 2026-05-26T13:31Z
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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 |
149.0 |
21.0 |
1174.0 |
O |
37.0 |
2026-05-26T01:27Z |
Updated BULK measurement based on SOHO LASCO C3 and GOES CCOR-1 imagery. Longitude and latitude were based on potential source signature in STEREO A EUVI 304 and 195 along the NW limb following the return of data around 2026-05-26T01:45Z. |
1: Result 1 (2.0 AU)
Mars = 2026-05-28T10:09Z
Parker Solar Probe = 2026-05-26T19:34Z
Psyche = 2026-05-28T09:01Z
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2026-05-26T12:28Z |
Carina Alden on 2026-05-26T12:32Z |
|
CME Analysis
|
M2M_CATALOG |
SH
|
true |
SWPC_CAT |
156.0 |
21.0 |
1786.0 |
O |
42.0 |
2026-05-25T23:57Z |
Updated SHOCK measurement using potential source location from STEREO A EUVI 304/195. There is a higher level of uncertainty with this analysis due to limited triangulation ability as well as the unique shape of the CME front. This analysis tracks the furthest out portion of the shock (the "nose") of the CME and includes most of the shock that is more in the ecliptic plane, however this measurement also includes unavoidable empty/dead space due to the overall shape of the shock front and the restrictions of the SWPC_CAT measuring tool. |
1: Result 1 (2.0 AU)
Mars = 2026-05-27T18:58Z
Psyche = 2026-05-27T18:01Z
Parker Solar Probe = 2026-05-26T14:00Z
|
2026-05-26T12:56Z |
Carina Alden on 2026-05-26T13:01Z |
|
CME Analysis
|
M2M_CATALOG |
LE
|
false |
SWPC_CAT |
145.0 |
28.0 |
1980.0 |
O |
31.0 |
2026-05-25T23:58Z |
Preliminary leading edge analysis, assuming former AR 14436 (~N18W145 at this time). STEREO A COR2 observations not available due to data gap, and not yet observed in LASCO C3. |
1: Result 1 (2.0 AU)
Mars = 2026-05-27T22:42Z
Psyche = 2026-05-27T21:38Z
Parker Solar Probe = 2026-05-26T16:00Z
Solar Orbiter = 2026-05-28T14:00Z
|
|
Tony Iampietro on 2026-05-26T01:53Z |
|
CME Analysis
|
M2M_CATALOG |
SH
|
false |
SWPC_CAT |
145.0 |
27.0 |
1671.0 |
O |
43.0 |
2026-05-26T00:16Z |
Shock front analysis with SOHO LASCO C2/C3 and GOES CCOR-1. STEREO A COR2 not available due to a data gap. The shock front is notably irregular shaped, with a northern lobe and southern feature observed as a wide partial halo. This fit tracks the majority of the observed shock front prioritizing the northern lobe in similarity to the bulk leading edge directionality. Longitude of W145 used as the approximate source of former AR 14436; the likely source for this CME without direct observation, and as such longitude could vary between W135-W155. |
1: Result 1 (2.0 AU)
Mars = 2026-05-27T20:46Z
Parker Solar Probe = 2026-05-26T13:22Z
Psyche = 2026-05-27T19:55Z
Solar Orbiter = 2026-05-28T06:00Z
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2026-05-26T01:44Z |
Tony Iampietro on 2026-05-26T01:53Z |
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