SOHO/LASCO Halo CME  20251110
COMMENTS:  Near symetric HALO CME resulting from an X1.7 class X-ray flare of AR 14274
                          centered at location [N27, E03]. 
                          LASCO velocity:  988.2 km/sec at PA 122 degrees.  Acceleration:  75.75 m/sec^2.
                         
                          Solar energetic particle event detected by SOHO.  The flux of one or more of the >28.2 MeV proton channels exceeds 10^(-1) pfu/MeV
                          starting at 2025-11-10T15:04Z.
                          Solar energetic particle event detected by GOES.  The flux of > 100 MeV protons exceeds 1 pfu starting at 2025-11-11T10:20Z.
                        
                         

Halo Alert: halo-message.20251110



UCMEO 93001 51110 2230/
51110 60936 81136 3201/ 320// 323// 41102
51110 60855 80919 42314 14274 1112/
99999
 
PLAIN
 
 
SOHO/LASCO HALO CME November 10, 2025 
 
C2 Start Time:  09:36 UT
 
C3 Start Time: 09:42 – 12:42 UT  
 
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1:  320      pa2:  320       Total Width:  360 degrees
 
Velocity Measurements:
 
C2 2 points 966.4 km/sec @ PA 320
C3 5 points 1023.3 km/sec @ PA 320 
Average through both fields:  1102.0 km/sec  Acceleration: -78.25 m/sec^2.  
 
 
COMMENT: A frontside, full HALO event can be seen in LASCO C2/C3 in the
                      Northwest direction starting @ 09:36 UT and @ 09:23 in the Northeast
                      direction in COR2-A. NOAA reports an eruptive X1.2 class flare found
                      in  AR 14274 [N23W14] associated with a solar energetic particle event
                      (proton event).    Opening lines can be seen in SDO/AIA 193 commencing
                     @ 09:03, and the solar flare is best seen in GOES-19 SUVI Composite
                     131 @ 09:16.
 


Preliminary UCMEO velocity and position measurements are delivered first.
Images, movies, and time/height information for this event will be available at:
 
https://umbra.nascom.nasa.gov/lasco/observations/halo/2025/251110/
 
 
Best Regards,
 
--Taylor Lanier
 
BT

[Images from the original alert message are omitted here]


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SOHO/LASCO C2 Diff
 SOHO/LASCO C3 Diff
 SUVI GOES-19 195 A
20251110_094807_c2rdiff_1024.gif
 20251110_110610_c3rdiff_1024.gif or_suvi-l2-ci195_g19_s20251110T092000Z_e20251110T092400Z_v1-0-2.png
SUVI / GOES19 131A SDO AIA  195 angstrom  Diff STEREO/COR2 AHEAD Diff
or_suvi-l2-ci131_g19_s20251110T091600Z_e20251110T092000Z_v1-0-2.png 20251110_aia_193_rdiff_1024.gif 20251110_scc_cor2_ahead_rdiff.gif
SOHO/LASCO C2 SOHO/LASCO C3 SDO / AIA  211A
20251110_0948_c2.png 20251110_1106_c3.png ssw_cutout_20251110_080011_aia_211_N23W14_20251110_080009_context_0800.gif


SOHO/LASCO C2
20251110_0948_D2_combo.gif
SOHO/LASCO C3
20251110_1106_D3_combo.gif
SDO 211A/193A/171A
20251110_sdo_aia_211-193-171.png


Time/Height Velocities and Plots

C2/C3
20251110_c2_ht.png

Click on Links below for additional information.
     

ENUL Forecast Model(TO DO)

Courtesy of Community Coordianted Modeling Center (CCMC) and the Space Weather Research Center (SWRC)

ENUL-2.7 20251110 Time/Density
ENUL Time Density Plot


MPEG Movies


Additional Information

LASCO Software IDL Save Files (.mvi)




  • Please, send questions and comments to Kevin Schenk