CCMC CME Scoreboard

Prediction for CME (2026-03-30T03:24:00-CME-001)

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# HALO CME ALERTS from the SIDC (RWC-Belgium), generated by CACTUS   #
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  A halo or partial-halo CME was detected with the following characteristics:

            t0      | dt0| pa | da |  v  |  dv | minv| maxv|
2026-03-30T03:24:22.828 | 5.0 | 132 | 150 | 1024 | 318 | 385 | 1562


      t0: onset time, earliest indication of liftoff
     dt0: duration of liftoff (hours)
      pa: principal angle, counterclockwise from North (degrees)
      da: angular width of the CME (degrees),
       v: median velocity (km/s)
      dv: variation (1 sigma) of velocity over the width of the CME
   mindv: lowest velocity detected within the CME
   maxdv: highest velocity detected within the CME

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# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #

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# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
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SIDC URSIGRAM 60330
SIDC SOLAR BULLETIN 30 Mar 2026, 1248UT
SIDC FORECAST
SOLAR FLARES  : M-class flares expected (probability >=50%)
GEOMAGNETISM  : Major (ISES: Severe) magstorm expected (A>=100 or K>=7)
SOLAR PROTONS : Warning condition (activity levels expected to increase, but no numeric forecast given)
PREDICTIONS FOR 30 Mar 2026  10CM FLUX: 160 / AP: 007
PREDICTIONS FOR 31 Mar 2026  10CM FLUX: 160 / AP: 007
PREDICTIONS FOR 01 Apr 2026  10CM FLUX: 160 / AP: 007

Coronal mass ejections: A coronal mass ejection (SIDC CME 644) was detected
in SOHO/LASCO-C2  on 30 March at 03:24 UTC. Automated CACTus detection
reports a full halo CME (width 360 degrees) with a principal angle of 132
degrees and a projected speed of 1024 km/s. This CME is associated with the
X1.4 flare (SIDC Flare 7290), which peaked at 03:19 UTC from SIDC Sunspot
Group 836 (NOAA Active Region 4405). This event was also accompanied by a
Type II radio emission, indicating the presence of a shock wave propagating
through the solar corona, with an estimated velocity of 1872 km/s. Initial
3D analysis suggests a propagation direction towards (S15E30) with an
angular width of approximately 45 degrees and a speed of about 1835 km/s.
The source region is consistent with the flare location at approximately
(S27E42). Given its source location and propagation direction, this CME is
expected to impact Earth in about 25-35 hours.

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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.

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