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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-05-30T08:38Z ( STEREO A: SECCHI/COR2 )
All Detecting Spacecrafts:
STEREO A: SECCHI/COR2
SOHO: LASCO/C2
SOHO: LASCO/C3
GOES: CCOR-1
Activity ID: 2026-05-30T08:38:00-CME-001 (version 1)
Note Keyword:
HAL: Halo CME
Source Signature Keyword:
Morphology Keyword:
Note: This CME is visible as a northwest partial halo in STEREO A COR2 imagery, and a northeast halo in SOHO LASCO C2/C3 and GOES CCOR-1 imagery. Although no evidence of an eruption was visible on the Earth-facing disk, the Solar Orbiter STIX instrument, which was located at longitude -155 at the time of this event, observed the equivalent of a ~C9 flare peaking at 2026-05-30T08:01Z. Additionally, STEREO Ahead observed an increase in the 13-100 MeV protons starting around 2026-05-30T09:00Z, with a peak value of 0.02 pfu/MeV observed at 2026-05-30T10:15Z. It is possible the source is related to former Active Region 14436, located at N18E150 at the time of this event, based on prior activity from this region when it was on the Earth-facing disk. Additionally, the triangulated CME measurement places the CME in the vicinity of former Active Region 14436.
Version 1 submitted on 2026-05-30T15:49Z by Mattie Anastopulos
A Notification with ID
20260530-AL-001 was sent on 2026-05-30T17:04Z
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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
|
M2M_CATALOG |
LE
|
true |
SWPC_CAT |
-168.0 |
23.0 |
776.0 |
C |
51.0 |
2026-05-30T12:59Z |
Bulk measurement based on the best fit between SOHO LASCO C2/C3 and STEREO A COR2 imagery. Due to the far-sided and therefore unknown source location, the measured parameters may vary slightly. |
1: Result 1 (2.0 AU)
Solar Orbiter = 2026-06-01T05:11Z
BepiColombo = 2026-05-31T14:00Z
2: Result 2 (5.5 AU)
Solar Orbiter = 2026-06-01T05:02Z
BepiColombo = 2026-05-31T14:00Z
Juno = 2026-06-13T12:00Z
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Mattie Anastopulos on 2026-05-30T15:59Z |
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CME Analysis
|
M2M_CATALOG |
SH
|
true |
SWPC_CAT |
-146.0 |
10.0 |
857.0 |
C |
57.0 |
2026-05-30T12:38Z |
Shock measurement tracking the faint, outermost portion based on the best fit between SOHO LASCO C2/C3 and STEREO A COR2 imagery. |
1: Result 1 (2.0 AU)
BepiColombo = 2026-05-31T06:54Z
Solar Orbiter = 2026-06-01T02:31Z
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Mattie Anastopulos on 2026-05-30T15:59Z |
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