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CME Scoreboard: Prediction Detail

Prediction for CME (2024-07-28T02:24:00-CME-001)

CME Observed Time: 2024-07-28T02:24Z
iSWAS Layout URL: https://kauai.ccmc.gsfc.nasa.gov/DONKI/view/CME/32269/-1
CME Note: Full halo CME visible in SOHO LASCO C2/C3 and towards the east in STEREO A COR2. The source is likely the M9.9 flare peaking at 2024-07-28T01:57Z from AR 3766 and/or the M7.8 flare directly preceding it from the same region. Dimming and EUV wave visible in SDO AIA 193 and 335 and GOES SUVI 284, post-eruptive arcades visible in SDO AIA 131/171/193. The eruption is also visible in STEREO A EUV imagery. Arrival signature is characterized by an increase in magnetic field components from 9nT to approx. 16nT, preceded by a smaller increase from 6nT to 9nT starting at 2024-07-31T10:40Z and accompanied by a sharp increase in solar wind speed from approx. 400 km/s to over 470 km/s, as well as sharp increase in solar wind density to over 10p/cc. This is possibly a combined arrival of this CME and multiple other Earth-directed CMEs.
CME Shock Arrival Time: 2024-07-31T13:46Z
Observed Geomagnetic Storm Parameters due to CME:
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Predicted Arrival Time: 2024-07-31T03:00Z (-6.0h, +12.0h)
Confidence that the CME will arrive: 60.0%
Predicted geomagnetic storm max Kp range due to CME: 4.0 - 7.0
Prediction Method: WSA-ENLIL + Cone (Met Office)
Prediction Method Note:

Met Office ENLIL settings.
ENLIL version: 2.7
Resolution: medium-res (512x60x180) (X1=0.1-1.7/uniform X2=30.-150./uniform X3=0.-360./uniform)
Ambient settings: a3b2-sa1
WSA version: 4.5
GONG: mrzqs
Note that this arrival time forecast is based on the simulation but is then adjusted by a human-in-the-loop.

Please specify following CME input parameters.
Time at 21.5Rs boundary: 2024-07-28T08:08
Radial velocity (km/s): 598
Longitude (deg): 03W
Latitude (deg): 04S
Half-angular width (deg): 54

Notes: Updated analysis. M9.9, wide shock and complex structure, perhaps containing multiple CMEs, and updated analysis with further images available. Arrival time brought forward as this CME is likely picked up by a later CME (from 1250/1422 on 28th)
Space weather advisor: Alister McHardy/Kirk Waite

Lead Time: 21.77 hour(s)
Difference: 10.77 hour(s)
Prediction submitted by Met Office (Met Office) on 2024-07-30T16:00Z

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