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Prediction for CME (2026-01-08T17:00:00-CME-001)

CME Observed Time: 2026-01-08T17:00Z
DONKI Link: https://kauai.ccmc.gsfc.nasa.gov/DONKI/view/CME/43839/-1
CME Note: Bright partial halo CME to the S and SE in SOHO LASCO and GOES CCOR-1 coronagraphs, fully covered by the daily data gap in STEREO A COR2. Its source is a massive, very complex filament eruption S and E of Active Region 14334 (S19E03), potentially involving two erupting filaments (one directly south of this active region and another more to the east. This eruption starts after ~2026-01-08T16Z to the SE of disk center and is associated with the long-duration C5.6 flare in this active region peaking at 2026-01-08T17:30Z. It is seen in SDO AIA 304/193 as bright, extensive post-eruptive arcades, a large-area dimming, faint EUV wave and erupting filaments seen in 304. Arrival at L1 (analyzed in discussion with LASSOS team): Significant shock signature characterized by a sudden jump in B total from 5 to 19nT, with Bz quickly reaching -18nT and then staying negative for four hours. Accompanied by a sharp increase in the solar wind speed from 450 to 620 km/s. There is also a sudden increase in ion density from 5 to 20 p/cc and a simultaneous, more gradual, increase in ion temperature from 35 K to over 500 K. After 2026-01-10T23:30Z the signature changes to what is likely an arrival of the flux rope, with smooth rotation of components and Bz turning northward for over four hours. B total increases from 7 to over 15 nT and density drops. It is possible that the initial shock signature incorporates a glancing blow from another CME.
CME Shock Arrival Time: 2026-01-10T19:36Z
Observed Geomagnetic Storm Parameters due to CME:
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Predicted Arrival Time: 2026-01-10T20:22Z (-7.0h, +7.0h)
Predicted geomagnetic storm max Kp range due to CME: 6.0 - 8.0
Prediction Method: WSA-ENLIL + Cone (NASA M2M)
Prediction Method Note:
## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Juno, OSIRIS-APEX, Solar Orbiter, STEREO A, Missions Near Earth)
##
## Message Issue Date: 2026-01-09T00:00:43Z
## Message ID: 20260109-AL-001
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.


## Summary:

C-type CME detected by GOES / SOHO. 

Start time of the event: 2026-01-08T17:00Z.

Estimated speed: ~878 km/s.

Estimated opening half-angle: 45 deg.

Direction (lon./lat.): -6/-27 in Heliocentric Earth Equatorial coordinates.

Activity ID: 2026-01-08T17:00:00-CME-001

Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that this CME may affect Juno (minor impact), OSIRIS-APEX, Solar Orbiter, and STEREO A (glancing blow).  The leading edge of the CME will reach Juno at 2026-01-22T20:00Z, Solar Orbiter at 2026-01-10T08:57Z, and its flank will reach OSIRIS-APEX at 2026-01-10T16:09Z and STEREO A at 2026-01-11T06:00Z (plus minus 7 hours). 

The simulation also indicates that the CME may impact NASA missions near Earth. Simulations indicate that the leading edge of the CME will reach NASA missions near Earth at about 2026-01-10T20:04Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 6-8 (moderate to severe).
   
  
Links to the movies of the modeled event (includes CME: 2026-01-08T17:00:00-CME-001):

(a) 2 AU outer boundary
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_anim.tim-den.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_anim.tim-vel.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_anim.tim-den-Stereo_A.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_anim.tim-vel-Stereo_A.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_ENLIL_CONE_timeline.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_ENLIL_CONE_STA_timeline.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_ENLIL_CONE_SolO_timeline.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_2.0_ENLIL_CONE_Osiris_timeline.gif

(b) 5.5 AU outer boundary
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_5.5_anim.tim-den.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_5.5_anim.tim-vel.gif
http://iswa.gsfc.nasa.gov/downloads/20260108_205100_5.5_ENLIL_CONE_Juno_timeline.gif


## Notes: 

This CME event (2026-01-08T17:00:00-CME-001) is associated with C5.6 flare with ID 2026-01-08T16:18:00-FLR-001 from Active Region 14334 (S19E03) which peaked at 2026-01-08T17:30Z.


SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s


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NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
Lead Time: 43.60 hour(s)
Difference: -0.77 hour(s)
Prediction submitted by Anna Chulaki (M2M SWAO) on 2026-01-09T00:00Z
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