DONKI Header

CCMC DONKI

DONKI: Menu Page

Go to:

 DONKI: View SW Activity
Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2026-08-31T05:24Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
STEREO A: SECCHI/COR2
GOES: CCOR-1
Activity ID: 2026-08-31T05:24:00-CME-001 (version 2)
Source Location: N16E75
Active Region Number: 14521
Note Keyword:
GAP: Data gap
Source Signature Keyword:
OFL: Moving/Opening field lines
BR: Brightening
Morphology Keyword:
O: Other
Note: CME observed to the E in SOHO LASCO C2/C3, STEREO A COR2, and in GOES CCOR-1 though somewhat obscured by earthshine. The source for this CME is not clear and could be related to AR 14521 as triangulation fits the front ~E70; potentially as faint loop brightening in SDO AIA 193 starting around 2026-08-31T04:58Z centered around N16E75 that could be sympathetic to the eruption at 2026-08-31T03:31Z associated to CME 2026-08-31T04:12Z. Some weak field line movement to the E is observed in SDO AIA 171 starting around 2026-08-31T04:00Z as another potential candidate. 
Version 1 submitted on 2026-08-31T15:48Z by Tony Iampietro
Version 2 submitted on 2026-08-31T15:56Z by Tony Iampietro
A Notification with ID 20260831-AL-004 was sent on 2026-08-31T16:51Z

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 -72.0 8.0 550.0 C 19.0 2026-08-31T11:48Z Triangulation between SOHO LASCO C2/C3 and STEREO A COR2. 1: Result 1 (2.0 AU)
Europa Clipper = 2026-09-04T00:00Z
OSIRIS-APEX = 2026-09-04T20:00Z
2026-08-31T12:45Z Tony Iampietro on 2026-08-31T15:52Z



All directly linked activities:
No Linked Activity Found.


Comments by users:
0 comment received.
Insert title here

The Moon to Mars Space Weather Analysis Office and other entities provide data to DONKI as a courtesy to the community.
By visiting this site, you acknowledge that you understand and agree to the Important Disclaimer Notice

If you are looking for the official U.S. Government forecast for space weather, please go to NOAA's Space Weather Prediction Center (https://swpc.noaa.gov). This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.

Curator: Chiu Wiegand | NASA Official: Dr. Masha Kuznetsova | Privacy and Security Notices | Accessibility | CCMC Data Policy