:Issued: 2024 Jan 29 0715 UTC
:Product: documentation at http://www.sidc.be/products/presto
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# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
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The 10 MeV proton flux has crossed the 10 pfu threshold level at 06:15 UTC January
29, it reached a peak value of 16.3 pfu before decreasing slightly but is currently
still above this threshold. The proton flux is expected to remain elevated over the
next 24 hours. This proton event was associated with the M6.8 flare near the
north-west limb from NOAA AR 3559, which peaked at 04:38 UTC January 29. Coronagraph
data is not yet available for this time and so an associated CME signature cannot yet
be confirmed.
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# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #
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:Issued: 2024 Jan 29 1157 UTC
:Product: documentation at http://www.sidc.be/products/presto
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# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
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A fast halo Coronal Mass Ejection (CME) was first observed in the LASCO/C2
coronagraph imagery at 04:24 UTC on January 29. The CME has an estimated projected
velocity of around 950 km/s and is related to the M6.8-flare from NOAA AR 3559, with
peak time 04:38 UTC. A Type II radio emission associated to this event was also
detected at 04:07 UTC. A preliminary analysis suggests that the bulk of the ejecta is
expected to miss Earth, however a glancing blow could possibly arrive at Earth on
January 31. Further analysis is ongoing.
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# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #
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# Website         http://www.sidc.be.                                #
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