:Issued: 2025 Nov 10 1617 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 greater than 10 MeV GOES proton flux rose promptly following the X1.2 flare from
SIDC Sunspot Group 687 (NOAA AR 4274) at 09:19 UTC. It exceeded the event threshold
at 11:30 UTC and has remained above it since. The X1.2 flare was also associated with
a Type IV radio emission, a signature often associated with major eruptions and fast
coronal mass ejections (CMEs), so an Earth-directed component remains plausible.
Further updates will follow as additional coronagraph data are assessed.
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